Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 9,776	$ 6,471	$ 28,417	$ 46,819
Other comprehensive income:
Foreign currency adjustments				4,904
Total other comprehensive income				4,904
Comprehensive income	$ 9,776	$ 6,471	$ 28,417	$ 51,723