Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 55,870	$ 79,879	$ (37,091)
Other comprehensive income (loss), net of tax:
Foreign currency translation	0	3	(6)
Total other comprehensive income (loss), net of tax	0	3	(6)
Comprehensive income (loss)	55,870	79,882	(37,097)
Net Income (Loss) Attributable to Noncontrolling Interest	31,239	37,060	23,791
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 24,631	$ 42,822	$ (60,888)