Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income/(loss)	$ 12,722	$ (126)	$ 25,223	$ 1,894
Foreign currency translation adjustment	16	425	1,123	(1,138)
Gain on derivatives qualifying as cash flow hedges, net of tax	336	405	161	498
Other comprehensive income/(loss)	352	830	1,284	(640)
Comprehensive income	$ 13,074	$ 704	$ 26,507	$ 1,254