CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY Statement - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]
Common stock, shares issued at Dec. 31, 2012		71,047,000
Stockholders' Equity Attributable to Parent at Dec. 31, 2012	$ (190,638)	$ (710)	$ (294,747)	$ (112,111)	$ (16,586)	$ (9,294)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	16,246				16,246
Other comprehensive income (loss)	3,180					3,180
Stock based compensation	8,131		8,131
Excess tax benefit over book expense from stock options exercised	2,868		2,868
Restricted stock issued, Shares		1,116,000
Restricted stock issued, Value	$ 11	$ 11
Restricted stock forfeited or withheld to satisfy tax obligations, Shares	(438,000)
Restricted stock forfeited or withheld to satisfy tax obligations, Value	$ (1,204)	$ (4)		(1,200)
Purchased of treasury stock under stock repurchase plan	$ (55,416)			(55,416)
Exercise of common stock options, Shares	1,688,079	1,689,000
Exercise of common stock options, Value	$ 3,358	$ 17	3,341
Common stock, shares issued at Dec. 31, 2013		73,414,000
Stockholders' Equity Attributable to Parent at Dec. 31, 2013	(167,812)	$ (734)	(309,087)	(168,727)	(32,832)	(6,114)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	27,612				27,612
Other comprehensive income (loss)	(7,792)					(7,792)
Stock based compensation	7,498		7,498
Excess tax benefit over book expense from stock options exercised	2,318		2,318
Restricted stock issued, Shares		1,114,000
Restricted stock issued, Value	11	$ 11
Restricted stock forfeited or withheld to satisfy tax obligations, Shares		(288,000)
Restricted stock forfeited or withheld to satisfy tax obligations, Value	(1,319)	$ (2)		(1,317)
Purchased of treasury stock under stock repurchase plan	$ (32,455)			(32,455)
Exercise of common stock options, Shares	3,126,522	3,126,000
Exercise of common stock options, Value	$ 14,113	$ 31	14,082
Common stock, shares issued at Dec. 31, 2014	77,366,000	77,366,000
Stockholders' Equity Attributable to Parent at Dec. 31, 2014	$ (177,798)	$ (774)	(332,985)	(202,499)	(60,444)	(13,906)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(10,968)
Other comprehensive income (loss)	(6,562)
Stock based compensation	10,185		10,185
Excess tax benefit over book expense from stock options exercised	2,050		2,050
Restricted stock issued, Shares		1,262,000
Restricted stock issued, Value	12	$ 12
Restricted stock forfeited or withheld to satisfy tax obligations, Shares		(245,000)
Restricted stock forfeited or withheld to satisfy tax obligations, Value	(1,838)	$ (2)		(1,836)
Purchased of treasury stock under stock repurchase plan	$ (39,075)			(39,075)
Exercise of common stock options, Shares	1,802,913	1,836,000
Exercise of common stock options, Value	$ 7,006	$ 18	6,988
Performance-Based Restricted Stock Units eligible to vest, Shares		498,000
Performance-Based Restricted Stock Units eligible to vest, Value	$ 5	$ 5
Common stock, shares issued at Dec. 31, 2015	80,717,000	80,717,000
Stockholders' Equity Attributable to Parent at Dec. 31, 2015	$ (138,613)	$ (807)	$ (352,208)	$ (243,410)	$ (49,476)	$ (20,468)