Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Consolidated net income	$ 14,289	$ 5,151	$ 16,380	$ 10,881
Other comprehensive income (loss), before income tax:
Unrealized foreign currency translation gain (loss)	15	(54)	(12)	(72)
Other comprehensive income (loss), before income taxes	15	(54)	(12)	(72)
Income tax (benefit) expense related to items of other comprehensive loss	0	0	0	0
Other comprehensive income (loss), net of tax	15	(54)	(12)	(72)
Comprehensive income	14,304	5,097	16,368	10,809
Less: Net income attributable to noncontrolling interest in subsidiary	223	142	529	365
Comprehensive income attributable to common shareholders	$ 14,081	$ 4,955	$ 15,839	$ 10,444