Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

(Dollars and shares in thousands, except per share amounts)	Three Months Ended						Six Months Ended
	June 30, 2018			June 25, 2017			June 30, 2018			June 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