Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Consolidated net income (loss)	$ 5,220	$ (17,095)	$ 3,502	$ 2,091
Other comprehensive income (loss), before income tax:
Unrealized foreign currency translation gain (loss)	24	(20)	58	(27)
Other comprehensive income (loss), net of tax	24	(20)	58	(27)
Comprehensive income (loss)	5,244	(17,115)	3,560	2,064
Less: Net income attributable to noncontrolling interest in subsidiary	370	142	662	306
Comprehensive income (loss) attributable to common shareholders	$ 4,874	$ (17,257)	$ 2,898	$ 1,758