Other Comprehensive Income (Loss) (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss)
Accumulated other comprehensive income (loss), balance at beginning of period, net	$ 173,872
Other comprehensive income (loss) before reclassifications	6,334
Amounts reclassified from accumulated other comprehensive income (loss)	4,191
Accumulated other comprehensive income (loss), balance at end of period, net	184,397
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss)
Accumulated other comprehensive income (loss), balance at beginning of period, net	(3,878)
Amounts reclassified from accumulated other comprehensive income (loss)	3,878
Unrealized/Recognized Gains (Losses)
Accumulated Other Comprehensive Income (Loss)
Accumulated other comprehensive income (loss), balance at beginning of period, net	177,750
Other comprehensive income (loss) before reclassifications	6,334
Amounts reclassified from accumulated other comprehensive income (loss)	313
Accumulated other comprehensive income (loss), balance at end of period, net	$ 184,397