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 (loss)	$ 38,523	$ (2,764)	$ (24,761)	$ 33,892
Other comprehensive income (loss), net of taxes:
Gross unrealized gains on derivative financial instruments	0	71	0	164
Currency translation adjustments	1,379	(2,401)	(184)	(2,895)
Other comprehensive income (loss)	1,379	(2,330)	(184)	(2,731)
Comprehensive income (loss)	39,902	(5,094)	(24,945)	31,161
Comprehensive income attributable to noncontrolling interests	(248)	(114)	(569)	(29)
Comprehensive income (loss) attributable to common unitholders	$ 39,654	$ (5,208)	$ (25,514)	$ 31,132