Condensed Consolidated Statements of Equity (unaudited) - USD ($) $ in Thousands	Total	Common Stock	Common Stock - Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock	Noncontrolling Interest
Beginning Balance (in shares) at Dec. 31, 2015		43,837,714
Beginning Balance at Dec. 31, 2015	$ 614,010	$ 4	$ 474,367	$ 169,680	$ (4,009)	$ (28,762)	$ 2,730
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)		33,973
Issuance of common stock	316		316
Issuance of common stock in acquisition (in shares)		500,000
Issuance of common stock in acquisition	4,050	$ 1	4,049
Treasury stock purchases (in shares)		(647,794)
Treasury stock purchases	(5,817)					(5,817)
Acquisition of noncontrolling interest	(179)						(179)
Stock compensation expense	1,076		1,076
Other comprehensive loss	1,664				1,579		85
Net income (loss)	(6,888)			(6,918)			30
Ending Balance (in shares) at Mar. 31, 2016		43,723,893
Ending Balance at Mar. 31, 2016	608,232	$ 5	479,808	162,762	(2,430)	(34,579)	2,666
Beginning Balance (in shares) at Dec. 31, 2016		38,553,413
Beginning Balance at Dec. 31, 2016	610,174	$ 5	480,906	214,007	(5,751)	$ (81,824)	2,831
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury stock purchases (in shares)						(24,494)
Conversion of restricted stock units to common stock (net of shares of treasury stock purchased) (in shares)		40,853
Conversion of restricted stock units to common stock (net of shares of treasury stock purchased)	(383)					$ (383)
Acquisition of noncontrolling interest	(3,102)		(271)				(2,831)
Stock compensation expense	1,308		1,308
Other comprehensive loss	551				551
Net income (loss)	(15,914)			(15,914)
Ending Balance (in shares) at Mar. 31, 2017		38,594,266
Ending Balance at Mar. 31, 2017	$ 592,634	$ 5	$ 481,943	$ 198,093	$ (5,200)	$ (82,207)	$ 0