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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount, after tax, of expense for award under share-based payment arrangement.

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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Number of non-option equity instruments exercised by participants.

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Number of shares under non-option equity instrument agreements that were either cancelled or expired.

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Net number of non-option equity instruments granted to participants.

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Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Number of share options (or share units) exercised during the current period.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Equity and Cash Incentive Programs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Stock-based compensation expense [Abstract]
Stock-based compensation expense	$ 5,071	$ 5,914	$ 9,799	$ 12,356
Tax benefit	(1,065)	(1,242)	(2,058)	(2,595)
Stock-based compensation expense, net of tax	$ 4,006	$ 4,672	$ 7,741	$ 9,761
Stock-Settled Appreciation Rights
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding, beginning balance (in shares)			393,523
Granted (in shares)			0
Forfeited / expired (in shares)			(1,758)
Exercised / vested (in shares)			0
Outstanding, ending balance (in shares)	391,765		391,765
Performance Share Awards
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding, beginning balance (in shares)			505,509
Granted (in shares)			347,920
Forfeited / expired (in shares)			0
Exercised / vested (in shares)			(72,410)
Outstanding, ending balance (in shares)	781,019		781,019
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding, beginning balance (in shares)			2,342,107
Granted (in shares)			932,588
Forfeited / expired (in shares)			(159,365)
Exercised / vested (in shares)			(437,275)
Outstanding, ending balance (in shares)	2,678,055		2,678,055
Non-Qualified Stock Options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, beginning balance (in shares)			5,488,653
Granted (in shares)			0
Forfeited / expired (in shares)			(2,859)
Exercised / vested (in shares)			(499,562)
Outstanding, ending balance (in shares)	4,986,232		4,986,232