Unaudited Condensed Consolidated Statement of Equity - 9 months ended Sep. 30, 2016 - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Non-controlling Interests
Beginning balance at Dec. 31, 2015	$ 294,009	$ 6	$ (17,869)	$ 273,451	$ (1,237)	$ 39,300	$ 358
Beginning balance (in shares) at Dec. 31, 2015		56,220,000	1,785,000
Increase (Decrease) in Equity [Roll Forward]
Net (loss) income	(35,211)					(35,211)
Foreign currency translation adjustment	256				256
Sale of common stock, net of issuance cost	$ 29,940			29,940
Issued in sale of common stock (in shares)	2,450,339	2,450,000
Stock issued under employee stock purchase plan	$ 670			670
Stock issued in payment of stock purchase plan (in shares)			(73,000)
Stock options exercised	$ 184			184
Stock options exercised (in shares)	114,112	114,000
Stock surrendered for exercise of stock options	$ (50)		$ (50)
Stock surrendered for exercise of stock options (in shares)			3,000
Restricted stock granted (in shares)	572,240	573,000
Restricted stock forfeited (in shares)			89,000
Treasury stock purchased	$ (925)		$ (925)
Treasury stock purchased (in shares)			90,000
Stock compensation expense	9,461			9,461
Reduction in tax benefit related to share-based awards	(883)			(883)
Stock issued in IPI acquisition	$ 3,268			3,268
Issued to purchase IPI (in shares)	247,764	248,000
Ending balance at Sep. 30, 2016	$ 300,719	$ 6	$ (18,844)	$ 316,091	$ (981)	$ 4,089	$ 358
Ending balance (in shares) at Sep. 30, 2016		59,605,000	1,894,000