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Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

Share-based Payment Arrangement [Abstract]

Share-based compensation expense

Share-based compensation expense and cash flow amounts were as follows:

			Year Ended December 31,
			2022						2021						2020
			(Dollars in millions)
Share-based compensation expense			$	8.4					$	10.0					$	13.5
Tax benefit			—						—						—
Share-based compensation expense, net of tax benefit			$	8.4					$	10.0					$	13.5
Cash received upon the exercise of stock options			—						—						—
Write-off tax benefits related to share-based compensation			—						—						—

Schedule of Share-based Compensation, Restricted Stock Units Activity

A summary of restricted stock unit activity is as follows:

			Year Ended December 31, 2022						Weighted Average Grant-Date Fair Value
Nonvested at December 31, 2021			1,103,828						$	8.99
Granted			325,040						11.87
Vested			(550,468)						10.60
Forfeited			(100,087)						8.38
Nonvested at December 31, 2022			778,313						$	9.13

Schedule of Performance Units Activity

A summary of performance unit activity is as follows:

			Year Ended December 31, 2022						Weighted Average Remaining Contractual Life
Nonvested at December 31, 2021			650,906						0.7
Granted			—
Vested			(109,709)
Forfeited			(91,176)
Nonvested at December 31, 2022			450,021						—

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- References

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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901

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Tabular disclosure of the changes in outstanding nonvested performance-based units.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)
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Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

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