Stock-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense (in USD)	$ 5.5	$ 4.0
Stock-based compensation amortization expense unrecognized (in USD)	$ 32.9
Average remaining vesting period (in years)	2 years 1 month 28 days
Time-Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted during the period (in shares)	1,100,000	1,000,000.0
Award vesting period (in years)	3 years
Average grant date fair value (usd per share)	$ 11.75	$ 10.79
Performance-Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted during the period (in shares)	604,000	589,000
Award vesting period (in years)	3 years
Average grant date fair value (usd per share)	$ 11.75	$ 10.82
2021 Plan \| Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	9,000,000
2016 Plan \| Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reduction of shares available to issue for shares granted after 2020 year end (in shares)	1

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

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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