Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss) attributable to Superior	$ (190,082)	$ 1,950
Other comprehensive income (loss), net of tax:
Foreign currency translation loss	(35,533)	(7,349)
Change in unrecognized gains (losses) on derivative instruments:
Change in fair value of derivatives	(58,426)	6,414
Tax benefit (provision)	13,129	(1,488)
Change in unrecognized gains (losses) on derivative instruments, net of tax	(45,297)	4,926
Defined benefit pension plan:
Actuarial gains on pension obligations, net of curtailments and amortization	72	52
Tax (provision)	(17)	(11)
Pension changes, net of tax	55	41
Other comprehensive loss, net of tax	(80,775)	(2,382)
Comprehensive loss attributable to Superior	$ (270,857)	$ (432)