Unaudited Condensed Consolidated Statement of Equity - 6 months ended Jun. 30, 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	(32,465)					(32,465)
Foreign currency translation adjustment	324				324
Stock issued under employee stock purchase plan	446			446
Stock issued in payment of stock purchase plan (shares)			(55)
Stock options exercised	134			134
Stock options exercised (shares)		86
Restricted stock granted (shares)		534
Restricted stock forfeited (shares)			83
Treasury stock purchased	(609)		$ (609)
Treasury stock purchased (shares)			68
Stock compensation expense	5,763			5,763
Reduction in tax benefit related to share-based awards	(954)			(954)
Ending balance at Jun. 30, 2016	$ 266,648	$ 6	$ (18,478)	$ 278,840	$ (913)	$ 6,835	$ 358
Ending balance (shares) at Jun. 30, 2016		56,840	1,881