Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net income	$ 119,209	$ 95,267	$ 102,226
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	4,613	(9,126)	(1,191)
Total comprehensive income	$ 123,822	$ 86,141	$ 101,035