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Retirement Savings Plans (Details) (USD $)
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12 Months Ended | ||
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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| Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] | |||
| Liability to participants under deferred compensation plan | $ 2,521,000 | $ 1,670,000 | |
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401(k) Profit-Sharing Plan
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| Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] | |||
| Company contributions to plan | 5,223,000 | 4,443,000 | 2,610,000 |
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Deferred Compensation Plan [Member]
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| Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] | |||
| Company contributions to plan | 245,000 | 155,000 | 108,000 |
| Fair value of mutual fund investments | $ 2,521,000 | $ 1,670,000 | |
| X | ||||||||||
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- Definition
The amount of payment into the fund established for purposes of making future disbursements to the individual in accordance with the terms and understanding of the deferred compensation arrangement. No definition available.
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- Details
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- Definition
Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable beyond one year (or the operating cycle, if longer). No definition available.
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- Definition
This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents investment securities as of the balance sheet date which may include marketable securities, derivative financial instruments, and investments accounted for under the equity method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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