Condensed Consolidated Statements of Comprehensive (Loss) Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Consolidated net (loss) income	$ (1,718)	$ 19,186
Other comprehensive income (loss), before income tax:
Unrealized foreign currency translation gain (loss)	34	(7)
Other comprehensive income (loss), net of tax	34	(7)
Comprehensive (loss) income	(1,684)	19,179
Less: Net income attributable to noncontrolling interest in subsidiary	292	164
Comprehensive (loss) income attributable to common shareholders	$ (1,976)	$ 19,015