Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Non- Controlling Interests	Restricted Stock Units Common Stock
Balance at Dec. 31, 2014	$ 645,085	$ 374	$ 217,289	$ 433,641	$ (24,669)	$ 18,450
Balance (in Shares) at Dec. 31, 2014		37,360,515
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,372			1,359		13
Issuance of common stock upon stock option exercises	1,114	$ 1	1,113
Issuance of common stock upon stock option exercises (in Shares)		100,191
Restricted shares issued (in Shares)							10,856
Issuance of shares pursuant to deferred stock unit awards (in Shares)		3,257
Forfeitures of restricted shares	0	$ 0
Forfeitures of restricted shares (in Shares)		(18,195)
Shares repurchased and retired	(7,622)	$ (5)	(7,617)
Shares repurchased and retired (in Shares)		(437,669)
Equity-based compensation expense	1,663		1,663
Currency translation adjustment and derivative transactions, net	(15,666)				(14,659)	(1,007)
Balance at Mar. 31, 2015	625,946	$ 370	212,448	435,000	(39,328)	17,456
Balance (in Shares) at Mar. 31, 2015		37,018,955
Balance at Dec. 31, 2015	$ 594,556	$ 361	199,951	425,574	(47,861)	16,531
Balance (in Shares) at Dec. 31, 2015	36,053,499	36,053,499
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ (3,949)			(3,792)		(157)
Issuance of common stock upon stock option exercises	$ 38	$ 0	38
Issuance of common stock upon stock option exercises (in Shares)	18,193	18,193
Restricted shares issued (in Shares)							9,733
Forfeitures of restricted shares	$ 0	$ 0
Forfeitures of restricted shares (in Shares)		(14,528)
Shares repurchased and retired	(16,325)	$ (9)	(16,316)
Shares repurchased and retired (in Shares)		(910,656)
Equity-based compensation expense	2,363		2,363
Sale of non-controlling interest	(7,278)					(7,278)
Currency translation adjustment and derivative transactions, net	(4,252)				(4,494)	242
Balance at Mar. 31, 2016	$ 565,153	$ 352	$ 186,036	$ 421,782	$ (52,355)	$ 9,338
Balance (in Shares) at Mar. 31, 2016	35,156,241	35,156,241