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Earnings (Loss) Per Share (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Computation of Earnings (Loss) Per Common Share

A summary of the information used in the computation of earnings (loss) per common share follows.

		Years Ended December 31,
($ in thousands, except per share data)		2020					2019					2018
Numerator:
Net income (loss)		$		(45,174	)		$		327,380			$		323,770
Net income or dividends allocated to participating securities - basic and diluted				1,756					5,546					5,930
Net income (loss) allocated to common shareholders - basic and diluted		$		(46,930	)		$		321,834			$		317,840
Denominator:
Weighted-average common shares - basic				86,533					86,488					85,355
Dilutive potential common shares				—					111					166
Weighted average common shares - diluted				86,533					86,599					85,521
Earnings (loss) per common share:
Basic		$		(0.54	)		$		3.72			$		3.72
Diluted		$		(0.54	)		$		3.72			$		3.72

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- References

No definition available.

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- Definition

Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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