Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Condensed Consolidated Statements Of Comprehensive Income (Loss) [Abstract]
Net income	$ 23,277	$ 35,356	$ 32,401	$ 64,317
Other comprehensive income (loss):
Foreign currency translation	221	(6,250)	(759)	(10,567)
Reclassification of cumulative foreign exchange translation adjustments to net income, net of tax of $0, $0, $0 and $(3), respectively				299
Total comprehensive income	$ 23,498	$ 29,106	$ 31,642	$ 54,049