Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Consolidated Statements Of Comprehensive Income [Abstract]
Net income	$ 111,159	$ 56,607	$ 51,959
Other comprehensive income (loss):
Foreign currency translation adjustments	591	993	(6,903)
Unrealized gain on investments, net of tax	418	1,476	526
Other	433	445	(111)
Other comprehensive income (loss)	1,442	2,914	(6,488)
Comprehensive income	$ 112,601	$ 59,521	$ 45,471