Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income/(Loss)	Treasury Stock	Non - Controlling Interest
Beginning balance at Dec. 31, 2012	$ 344,517	$ 33	$ 195,248	$ 188,882	$ (36,647)	$ (3,024)	$ 25
Beginning balance (in shares) at Dec. 31, 2012		32,540,082				(336,262)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued on exercise/vesting of equity awards	5,489		5,489
Stock issued on exercise/vesting of equity awards (in shares)		802,230
Stock based compensation	11,832		11,832
Excess tax benefit from stock based compensation	1,953		1,953
Acquisition of treasury stock	(21,618)					$ (21,618)
Acquisition of treasury stock (in shares)						(833,867)
Non controlling interest	(25)						(25)
Other comprehensive income	(24,071)				(24,071)
Net income	48,097			48,097
Ending balance at Dec. 31, 2013	366,174	$ 33	214,522	236,979	(60,718)	$ (24,642)	0
Ending balance (shares) at Dec. 31, 2013		33,342,312				(1,170,129)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued on exercise/vesting of equity awards	6,460	$ 1	6,459
Stock issued on exercise/vesting of equity awards (in shares)		861,040
Stock based compensation	11,011		11,011
Excess tax benefit from stock based compensation	1,181		1,181
Acquisition of treasury stock	(3,322)					$ (3,322)
Acquisition of treasury stock (in shares)						(127,756)
Non controlling interest	0						0
Other comprehensive income	5,209				5,209
Net income	32,445			32,445
Ending balance at Dec. 31, 2014	$ 419,158	$ 34	233,173	269,424	(55,509)	$ (27,964)
Ending balance (shares) at Dec. 31, 2014	32,905,467	34,203,352				(1,297,885)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued on exercise/vesting of equity awards	$ 3,375	$ 1	3,374
Stock issued on exercise/vesting of equity awards (in shares)		577,849
Stock based compensation	16,047		16,047
Excess tax benefit from stock based compensation	1,458		1,458
Acquisition of treasury stock	(14,195)					$ (14,195)
Acquisition of treasury stock (in shares)						(392,093)
Non controlling interest	179						179
Other comprehensive income	(11,816)				(11,816)
Net income	51,565			51,565
Ending balance at Dec. 31, 2015	$ 465,771	$ 35	$ 254,052	$ 320,989	$ (67,325)	$ (42,159)	$ 179
Ending balance (shares) at Dec. 31, 2015	33,091,223	34,781,201				(1,689,978)