Basic earnings per share is computed by dividing net income (loss) attributable to Superior, after adjusting for redeemable preferred stock dividend and accretion, European non-controlling redeemable equity dividends and, with respect to 2018, the preferred stock modification (consisting of the preferred stock reduction of $17.2 million, net of the increase in the embedded derivative liability of $1.9 million), by the weighted average number of common shares outstanding. For purposes of calculating diluted earnings per share, the weighted average shares outstanding includes the dilutive effect of outstanding stock options and time and performance based restricted stock units under the treasury stock method. The redeemable preferred shares discussed in Note 12, “Redeemable Preferred Stock” are not included in the diluted earnings per share because the conversion would be anti-dilutive.

Year Ended December 31,	2019			2018			2017
(Dollars in thousands, except per share amounts)
Basic Earnings Per Share:
Reported net income (loss) attributable to Superior	$	(96,460	)	$	25,961		$	(6,203	)
Less: Redeemable preferred stock dividends and accretion		(30,977	)		(32,462	)		(18,912	)
Add: Preferred stock modification		—			15,257			—
Less: European non-controlling redeemable equity dividend		(566	)		(1,512	)		—
Basic numerator	$	(128,003	)	$	7,244		$	(25,115	)
Basic earnings (loss) per share	$	(5.10	)	$	0.29		$	(1.01	)
Weighted average shares outstanding-Basic		25,099			24,994			24,929
Diluted Earnings Per Share:
Reported net income (loss) attributable to Superior	$	(96,460	)	$	25,961		$	(6,203	)
Less: Redeemable preferred stock dividends and accretion		(30,977	)		(32,462	)		(18,912	)
Add: Preferred stock modification		—			15,257			—
Less: European non-controlling redeemable equity dividend		(566	)		(1,512	)		—
Diluted numerator	$	(128,003	)	$	7,244		$	(25,115	)
Diluted earnings (loss) per share	$	(5.10	)	$	0.29		$	(1.01	)
Weighted average shares outstanding-Basic		25,099			24,994			24,929
Dilutive effect of common share equivalents		—			161			—
Weighted average shares outstanding-Diluted		25,099			25,155			24,929