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

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of stock repurchase plan authorized.

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Amount remaining of a stock repurchase plan authorized.

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Capital Stock and Equity Compensation (Additional Information) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program				$ 100,000,000
Stock repurchase program remaining	$ 49,000,000
Share repurchases (in shares)	0	0	0
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock award program, measurement period (years)	3 years
Expected dividend yield (percent)	0.00%
Compensation expense	$ 7,700,000	$ 5,800,000	$ 5,000,000
Nonvested awards, total compensation cost not yet recognized	$ 7,400,000
Weighted-average remaining contractual life in years, options outstanding	10 months 24 days
Performance Shares \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock award program, awarded shares as a percentage of the original award amount (percent)	0.00%
Performance Shares \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock award program, awarded shares as a percentage of the original award amount (percent)	200.00%
Time Based Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 7,600,000	6,000,000	5,800,000
Nonvested awards, total compensation cost not yet recognized	$ 7,800,000
Weighted-average remaining contractual life in years, options outstanding	10 months 24 days
Conversion ratio	1
Deferred Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 1,200,000	$ 1,100,000	$ 1,100,000
Anniversary period from grant date	13 months
Conversion ratio	1