Unaudited Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Net income	$ 32,289		$ 13,006		$ 45,016		$ 24,161
Comprehensive income:
Gain on cash flow hedge(1)	0	[1]	149	[1]	0	[1]	1,375	[1]
Foreign currency gain (loss)	29,599		15,382		(14,890)		17,562
Total comprehensive income	$ 61,888		$ 28,537		$ 30,126		$ 43,098

[1] Net of income tax expense of $0.1 million for the three months ended September 30,2012, and $1.6 million for the nine months ended 2012.