Consolidated Statements Of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Consolidated Statements Of Comprehensive Income (Loss) [Abstract]
Net income	$ 3,839	$ 5,925	$ 3,805	$ 22,886
Other comprehensive income, net of tax
Foreign currency translation adjustments	(2,257)	(1,136)	(3,577)	(156)
Net change in unrealized gains (losses) on securities	63	(47)	175	(14)
Other comprehensive loss, net of tax	(2,194)	(1,183)	(3,402)	(170)
Total comprehensive income	$ 1,645	$ 4,742	$ 403	$ 22,716