|
Fair Value Measures Fair Value Measures (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) (USD $)
In Thousands, unless otherwise specified
|
Dec. 31, 2013
|
Dec. 31, 2012
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
$ 367,420
|
$ 184,139
|
| Liabilities, Fair Value Disclosure |
1,247
|
1,322
|
|
Fair Value, Inputs, Level 1 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
220,930
|
99,972
|
| Liabilities, Fair Value Disclosure |
0
|
0
|
|
Fair Value, Inputs, Level 2 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
146,490
|
84,167
|
| Liabilities, Fair Value Disclosure |
1,247
|
1,322
|
|
Fair Value, Inputs, Level 3 [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Assets, Fair Value Disclosure |
0
|
0
|
| Liabilities, Fair Value Disclosure |
0
|
0
|
|
Money Market Funds [Member] | Cash Equivalents [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
175,624
|
70,857
|
|
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Cash Equivalents [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
175,624
|
70,857
|
|
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member] | Cash Equivalents [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
0
|
0
|
|
Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member] | Cash Equivalents [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
0
|
0
|
|
Bank Time Deposits [Member] | Cash Equivalents [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
34,637
|
25,035
|
|
Bank Time Deposits [Member] | Fair Value, Inputs, Level 1 [Member] | Cash Equivalents [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
25,111
|
25,035
|
|
Bank Time Deposits [Member] | Fair Value, Inputs, Level 2 [Member] | Cash Equivalents [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
9,526
|
0
|
|
Bank Time Deposits [Member] | Fair Value, Inputs, Level 3 [Member] | Cash Equivalents [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Assets, Fair Value Disclosure |
0
|
0
|
|
Certificates of Deposit [Member] | Cash Equivalents [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Assets, Fair Value Disclosure |
735
|
2,450
|
|
Certificates of Deposit [Member] | Available-for-sale Securities [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
9,546
|
7,596
|
|
Certificates of Deposit [Member] | Fair Value, Inputs, Level 1 [Member] | Cash Equivalents [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
0
|
0
|
|
Certificates of Deposit [Member] | Fair Value, Inputs, Level 1 [Member] | Available-for-sale Securities [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
0
|
0
|
|
Certificates of Deposit [Member] | Fair Value, Inputs, Level 2 [Member] | Cash Equivalents [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
735
|
2,450
|
|
Certificates of Deposit [Member] | Fair Value, Inputs, Level 2 [Member] | Available-for-sale Securities [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
9,546
|
7,596
|
|
Certificates of Deposit [Member] | Fair Value, Inputs, Level 3 [Member] | Cash Equivalents [Member]
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Assets, Fair Value Disclosure |
0
|
0
|
|
Certificates of Deposit [Member] | Fair Value, Inputs, Level 3 [Member] | Available-for-sale Securities [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Assets, Fair Value Disclosure |
0
|
0
|
|
Repurchase Agreements [Member] | Cash Equivalents [Member]
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Assets, Fair Value Disclosure |
45,000
|
25,000
|
|
Repurchase Agreements [Member] | Fair Value, Inputs, Level 1 [Member] | Cash Equivalents [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Assets, Fair Value Disclosure |
0
|
0
|
|
Repurchase Agreements [Member] | Fair Value, Inputs, Level 2 [Member] | Cash Equivalents [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Assets, Fair Value Disclosure |
45,000
|
25,000
|
|
Repurchase Agreements [Member] | Fair Value, Inputs, Level 3 [Member] | Cash Equivalents [Member]
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Assets, Fair Value Disclosure |
0
|
0
|
|
U.S. Government-Backed Municipal Bonds [Member] | Cash Equivalents [Member]
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Assets, Fair Value Disclosure |
9,898
|
5,348
|
|
U.S. Government-Backed Municipal Bonds [Member] | Available-for-sale Securities [Member]
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Assets, Fair Value Disclosure |
14,764
|
14,425
|
|
U.S. Government-Backed Municipal Bonds [Member] | Fair Value, Inputs, Level 1 [Member] | Cash Equivalents [Member]
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Assets, Fair Value Disclosure |
0
|
0
|
|
U.S. Government-Backed Municipal Bonds [Member] | Fair Value, Inputs, Level 1 [Member] | Available-for-sale Securities [Member]
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Assets, Fair Value Disclosure |
0
|
0
|
|
U.S. Government-Backed Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member] | Cash Equivalents [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Assets, Fair Value Disclosure |
9,898
|
5,348
|
|
U.S. Government-Backed Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member] | Available-for-sale Securities [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
14,764
|
14,425
|
|
U.S. Government-Backed Municipal Bonds [Member] | Fair Value, Inputs, Level 3 [Member] | Cash Equivalents [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
0
|
0
|
|
U.S. Government-Backed Municipal Bonds [Member] | Fair Value, Inputs, Level 3 [Member] | Available-for-sale Securities [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Assets, Fair Value Disclosure |
0
|
0
|
|
Short-term municipal bond fund [Member] | Available-for-sale Securities [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Assets, Fair Value Disclosure |
15,004
|
|
|
Short-term municipal bond fund [Member] | Fair Value, Inputs, Level 1 [Member] | Available-for-sale Securities [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Assets, Fair Value Disclosure |
15,004
|
|
|
Short-term municipal bond fund [Member] | Fair Value, Inputs, Level 2 [Member] | Available-for-sale Securities [Member]
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Assets, Fair Value Disclosure |
0
|
|
|
Short-term municipal bond fund [Member] | Fair Value, Inputs, Level 3 [Member] | Available-for-sale Securities [Member]
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Assets, Fair Value Disclosure |
0
|
|
|
Variable Rate Demand Obligation [Member] | Available-for-sale Securities [Member]
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Assets, Fair Value Disclosure |
52,105
|
22,640
|
|
Variable Rate Demand Obligation [Member] | Fair Value, Inputs, Level 1 [Member] | Available-for-sale Securities [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Assets, Fair Value Disclosure |
0
|
0
|
|
Variable Rate Demand Obligation [Member] | Fair Value, Inputs, Level 2 [Member] | Available-for-sale Securities [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
52,105
|
22,640
|
|
Variable Rate Demand Obligation [Member] | Fair Value, Inputs, Level 3 [Member] | Available-for-sale Securities [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Assets, Fair Value Disclosure |
0
|
0
|
|
Derivative Financial Instruments, Assets [Member] | Other Current Assets [Member]
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Assets, Fair Value Disclosure |
4,892
|
6,219
|
|
Derivative Financial Instruments, Assets [Member] | Non Current Assets [Member]
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Assets, Fair Value Disclosure |
24
|
489
|
|
Derivative Financial Instruments, Assets [Member] | Fair Value, Inputs, Level 1 [Member] | Other Current Assets [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Assets, Fair Value Disclosure |
0
|
0
|
|
Derivative Financial Instruments, Assets [Member] | Fair Value, Inputs, Level 1 [Member] | Non Current Assets [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
0
|
0
|
|
Derivative Financial Instruments, Assets [Member] | Fair Value, Inputs, Level 2 [Member] | Other Current Assets [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
4,892
|
6,219
|
|
Derivative Financial Instruments, Assets [Member] | Fair Value, Inputs, Level 2 [Member] | Non Current Assets [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
24
|
489
|
|
Derivative Financial Instruments, Assets [Member] | Fair Value, Inputs, Level 3 [Member] | Other Current Assets [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
0
|
0
|
|
Derivative Financial Instruments, Assets [Member] | Fair Value, Inputs, Level 3 [Member] | Non Current Assets [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
0
|
0
|
|
Mutual Fund Shares [Member] | Trading Securities [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
336
|
|
|
Mutual Fund Shares [Member] | Non Current Assets [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
4,855
|
4,080
|
|
Mutual Fund Shares [Member] | Fair Value, Inputs, Level 1 [Member] | Trading Securities [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
336
|
|
|
Mutual Fund Shares [Member] | Fair Value, Inputs, Level 1 [Member] | Non Current Assets [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
4,855
|
4,080
|
|
Mutual Fund Shares [Member] | Fair Value, Inputs, Level 2 [Member] | Trading Securities [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
0
|
|
|
Mutual Fund Shares [Member] | Fair Value, Inputs, Level 2 [Member] | Non Current Assets [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
0
|
0
|
|
Mutual Fund Shares [Member] | Fair Value, Inputs, Level 3 [Member] | Trading Securities [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
0
|
|
|
Mutual Fund Shares [Member] | Fair Value, Inputs, Level 3 [Member] | Non Current Assets [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Assets, Fair Value Disclosure |
0
|
0
|
|
Derivative Financial Instruments, Liabilities [Member] | Accrued Liabilities [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Liabilities, Fair Value Disclosure |
1,152
|
1,322
|
|
Derivative Financial Instruments, Liabilities [Member] | Other Long Term Liabilities [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Liabilities, Fair Value Disclosure |
95
|
|
|
Derivative Financial Instruments, Liabilities [Member] | Fair Value, Inputs, Level 1 [Member] | Accrued Liabilities [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Liabilities, Fair Value Disclosure |
0
|
0
|
|
Derivative Financial Instruments, Liabilities [Member] | Fair Value, Inputs, Level 1 [Member] | Other Long Term Liabilities [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Liabilities, Fair Value Disclosure |
0
|
|
|
Derivative Financial Instruments, Liabilities [Member] | Fair Value, Inputs, Level 2 [Member] | Accrued Liabilities [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Liabilities, Fair Value Disclosure |
1,152
|
1,322
|
|
Derivative Financial Instruments, Liabilities [Member] | Fair Value, Inputs, Level 2 [Member] | Other Long Term Liabilities [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Liabilities, Fair Value Disclosure |
95
|
|
|
Derivative Financial Instruments, Liabilities [Member] | Fair Value, Inputs, Level 3 [Member] | Accrued Liabilities [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Liabilities, Fair Value Disclosure |
0
|
0
|
|
Derivative Financial Instruments, Liabilities [Member] | Fair Value, Inputs, Level 3 [Member] | Other Long Term Liabilities [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Liabilities, Fair Value Disclosure |
$ 0
|
|