Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) [Abstract]
Net income	$ 13,925	$ 10,629	$ 18,772	$ 39,754
Other comprehensive income (loss):
Foreign currency translation	3,915	(7,095)	4,055	(1,893)
Total comprehensive income	$ 17,840	$ 3,534	$ 22,827	$ 37,861