UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 186	$ (21,546)	$ 7,286	$ (19,301)
Foreign currency translation gain (loss)	348	(638)	105	(425)
Total comprehensive income (loss)	534	(22,184)	7,391	(19,726)
Less: comprehensive income attributable to noncontrolling interest	295	1,862	4,128	3,555
Comprehensive income (loss) attributable to the Corporation	$ 239	$ (24,046)	$ 3,263	$ (23,281)