Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 25, 2017	Jun. 30, 2018	Jun. 25, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss) attributable to Superior	$ 8,135	$ (7,272)	$ 18,452	$ (4,170)
Other comprehensive income (loss), net of tax:
Foreign currency translation (loss) gain, net of tax	(38,084)	14,295	(17,180)	23,345
Change in unrecognized gains (losses) on derivative instruments:
Change in fair value of derivatives	(22,566)	10,568	(4,894)	27,962
Tax benefit (provision)	4,577		815	(335)
Change in unrecognized (losses) gains on derivative instruments, net of tax	(17,989)	10,568	(4,079)	27,627
Defined benefit pension plan:
Actuarial gains on pension obligation, net of curtailments and amortization	68	93	177	185
Tax provision	(24)	(25)	(46)	(49)
Pension changes, net of tax	44	68	131	136
Other comprehensive (loss) income, net of tax	(56,029)	24,931	(21,128)	51,108
Comprehensive (loss) income attributable to Superior	$ (47,894)	$ 17,659	$ (2,676)	$ 46,938