Consolidated Statement of Shareholders' Equity Statement - 9 months ended Sep. 30, 2016 - USD ($) $ in Thousands	Total	Common Stock [Member]	Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income [Member]
Balances at Dec. 31, 2015	$ 547,190	$ 450	$ 812,160	$ (254,120)	$ (11,300)
Net income	27,560			27,560
Other comprehensive income (loss)	(11,510)				(11,510)
Shares surrendered upon vesting of options and restricted stock awards to cover tax obligations	(1,500)		(1,500)
Stock option exercises and restricted stock vesting	120	10	110
Tax effect from stock based compensation	(90)		(90)
Non-cash compensation expense	5,240		5,240
Balances at Sep. 30, 2016	$ 567,010	$ 460	$ 815,920	$ (226,560)	$ (22,810)