Unaudited Condensed Consolidated Statement of Equity - 3 months ended Mar. 31, 2016 - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Noncontrolling Interests [Member]
Beginning balance at Dec. 31, 2015	$ 294,009	$ 6	$ (17,869)	$ 273,451	$ (1,237)	$ 39,300	$ 358
Beginning balance, shares at Dec. 31, 2015		56,220	1,785
Increase (Decrease) in Equity [Roll Forward]
Net loss	(30,185)					(30,185)
Foreign currency translation adjustment	318				318
Stock issued under employee stock purchase plan	212			212
Stock issued in payment of stock purchase plan, shares			(34)
Stock options exercised	134			134
Stock options exercised, shares		85
Restricted stock granted, shares		410
Restricted stock forfeited, shares			78
Treasury stock purchased	(154)		$ (154)
Treasury stock purchased, shares			21
Stock compensation expense	2,365			2,365
Reduction in tax benefit related to share-based awards	(365)			(365)
Ending balance at Mar. 31, 2016	$ 266,334	$ 6	$ (18,023)	$ 275,797	$ (919)	$ 9,115	$ 358
Ending balance, shares at Mar. 31, 2016		56,715	1,850