Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Income (Details)

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Accumulated Other Comprehensive Income (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Accumulated other comprehensive income at beginning of period $ 35,360 $ 46,663
Other comprehensive income (loss) before reclassifications (4,675) (10,495)
Amounts reclassified from other comprehensive income (476) (723)
Net other comprehensive income (loss) during the period (5,151) (11,218)
Accumulated other comprehensive income at end of period 30,209 35,445
Unrealized Holding Gains (Losses) on Available-For-Sale Securities [Member]
   
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Accumulated other comprehensive income at beginning of period (6) (9)
Other comprehensive income (loss) before reclassifications 1 9
Amounts reclassified from other comprehensive income 0 0
Net other comprehensive income (loss) during the period 1 9
Accumulated other comprehensive income at end of period (5) 0
Unrealized Holding Gains (Losses) on Derivative Transactions [Member]
   
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Accumulated other comprehensive income at beginning of period 1,244 2,505
Other comprehensive income (loss) before reclassifications 704 2,153
Amounts reclassified from other comprehensive income (476) (723)
Net other comprehensive income (loss) during the period 228 1,430
Accumulated other comprehensive income at end of period 1,472 3,935
Foreign Currency Translation Adjustment [Member]
   
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Accumulated other comprehensive income at beginning of period 34,122 44,167
Other comprehensive income (loss) before reclassifications (5,380) (12,657)
Amounts reclassified from other comprehensive income 0 0
Net other comprehensive income (loss) during the period (5,380) (12,657)
Accumulated other comprehensive income at end of period $ 28,742 $ 31,510