Condensed Consolidated Statements of Comprehensive Income (Loss) (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 1,687	$ 2,955	$ 31,475	$ 40,535
Other comprehensive income (loss):
Foreign currency translation adjustments	506	(3,524)	(8,293)	(2,671)
Other comprehensive income (loss)	506	(3,524)	(8,293)	(2,671)
Comprehensive income (loss)	2,193	(569)	23,182	37,864
Comprehensive (income) loss attributable to non-controlling interest	(80)	105	171	167
Comprehensive income (loss) attributable to controlling interest	$ 2,113	$ (464)	$ 23,353	$ 38,031