Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Shares [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance, Amount at Dec. 31, 2012	$ 356,439	$ 1,934	$ 246,306	$ 102,709	$ 5,490
Balance, Shares at Dec. 31, 2012		19,339,329
Net loss	(28,812)			(28,812)
Unrealized gain (loss) on derivative instrument net of tax expense/benefit	(279)				(279)
Currency translation adjustment	(1,708)				(1,708)
Share-based compensation expense	6,267		6,267
Common shares issued	3,450	$ 20	3,430
Common shares issued, Shares		200,584
Retirement of repurchased common stock	(39,494)	$ (144)	(39,350)
Retirement of repurchased common stock, Shares		(1,437,578)
Balance, Amount at Dec. 31, 2013	295,863	$ 1,810	216,653	73,897	3,503
Balance, Shares at Dec. 31, 2013		18,102,335
Net loss	(8,537)			(8,537)
Unrealized gain (loss) on derivative instrument net of tax expense/benefit	248				248
Currency translation adjustment	(4,133)				(4,133)
Share-based compensation expense	5,724		5,724
Common shares issued	10,462	$ 51	10,411
Common shares issued, Shares		509,160
Balance, Amount at Dec. 31, 2014	$ 299,627	$ 1,861	232,788	65,360	(382)
Balance, Shares at Dec. 31, 2014	18,611,495	18,611,495
Net loss	$ (2,809)			(2,809)
Unrealized gain (loss) on derivative instrument net of tax expense/benefit	128				128
Currency translation adjustment	(3,907)				(3,907)
Share-based compensation expense	7,214		7,214
Common shares issued	3,704	$ 34	3,670
Common shares issued, Shares		342,192
Retirement of repurchased common stock	(11,575)	$ (29)	(11,546)
Retirement of repurchased common stock, Shares		(293,991)
Balance, Amount at Dec. 31, 2015	$ 290,311	$ 1,866	$ 232,126	$ 62,551	(6,232)
Balance, Shares at Dec. 31, 2015	18,659,696	18,659,696
Unrealized gain (loss) on debt securities net of tax expense/benefit	$ (2,071)				$ (2,071)