Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss) attributable to Superior	$ (96,460)	$ 25,961	$ (6,203)
Other comprehensive income (loss), net of tax:
Foreign currency translation (loss) gain	(5,168)	(23,924)	29,822
Change in unrecognized gains on derivative instruments:
Change in fair value of derivatives	17,515	7,221	14,067
Tax provision	(4,359)	(1,928)	(6,464)
Change in unrecognized gains on derivative instruments, net of tax	13,156	5,293	7,603
Defined benefit pension plan:
Actuarial gains (losses) on pension obligation, net of curtailments and amortization	(4,086)	2,924	(1,931)
Tax (provision) benefit	1,515	(667)	310
Pension changes, net of tax	(2,571)	2,257	(1,621)
Other comprehensive income (loss), net of tax	5,417	(16,374)	35,804
Comprehensive income (loss) attributable to Superior	$ (91,043)	$ 9,587	$ 29,601