Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 26, 2017
Statement of Comprehensive Income [Abstract]
Net income attributable to Superior	$ 10,317	$ 3,102
Other comprehensive income, net of tax:
Foreign currency translation gain, net of tax	20,904	9,050
Change in unrecognized gains (losses) on derivative instruments:
Change in fair value of derivatives	17,672	17,394
Tax provision	(3,762)	(335)
Change in unrecognized gains (losses) on derivative instruments, net of tax	13,910	17,059
Defined benefit pension plan:
Amortization of actuarial loss	109	92
Tax provision	(22)	(24)
Pension changes, net of tax	87	68
Other comprehensive income, net of tax	34,901	26,177
Comprehensive income	$ 45,218	$ 29,279