Earnings Per Share - Schedule of Earnings Per share, Basic and Diluted (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 25, 2017	Jun. 30, 2018	Jun. 25, 2017
Basic Earnings Per Share:
Reported net income (loss) attributable to Superior	$ 8,135	$ (7,272)	$ 18,452	$ (4,170)
Less: Redeemable preferred stock dividends and accretion	(8,135)	(2,882)	(16,204)	(2,882)
Less: European non-controlling redeemable equity dividend	(511)		(1,084)
Add: European non-controlling redeemable equity translation adjustment	2,851		2,851
Basic numerator	$ 2,340	$ (10,154)	$ 4,015	$ (7,052)
Basic earnings (loss) per share	$ 0.09	$ (0.41)	$ 0.16	$ (0.28)
Weighted average shares outstanding-Basic	25,001	24,908	24,969	24,961
Diluted Earnings Per Share:
Reported net income (loss) attributable to Superior	$ 8,135	$ (7,272)	$ 18,452	$ (4,170)
Less: Redeemable preferred stock dividends and accretion	(8,135)	(2,882)	(16,204)	(2,882)
Less: European non-controlling redeemable equity dividend	(511)		(1,084)
Add: European non-controlling redeemable equity translation adjustment	2,851		2,851
Diluted numerator	$ 2,340	$ (10,154)	$ 4,015	$ (7,052)
Diluted earnings (loss) per share	$ 0.09	$ (0.41)	$ 0.16	$ (0.28)
Weighted average shares outstanding-Basic	25,001	24,908	24,969	24,961
Weighted average dilutive stock options and restricted stock units	52		39
Weighted average shares outstanding-Diluted	25,053	24,908	25,008	24,961