Equity-Based Compensation Plans - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Performance Based Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period			3 years
Weighted average share price	$ 0	$ 18.06	$ 17.90
Intrinsic value, outstanding	$ 5.8
Compensation cost share based awards	2.6	$ 0.1	$ 0.9
Unrecognized compensation expense	$ 2.9
Period of recognition	4 months 24 days
Restricted Stock and Stock Unit
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average share price	$ 9.16	$ 10.91	$ 11.91
Intrinsic value, outstanding	$ 2.5
Compensation cost share based awards	3.6	$ 6.2	$ 5.6
Unrecognized compensation expense	$ 1.8
Period of recognition	8 months 12 days
Restricted stock units vested but common shares not distributed (in shares)	500,000	660,000	528,000
Vested in Period, Fair Value	$ 7.1	$ 5.0	$ 3.6
2019 Long Term Incentive and Equity Award Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for issuance (in shares)	1,900,000
Equity award plan. vesting rights	According to the plan provisions, the stock units provide the holders the right to receive one share of our Common Stock upon vesting (and distribution) of one stock unit.
2019 Long Term Incentive and Equity Award Plan \| Key Management Personnel
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for issuance (in shares)	2,500,000
2011 and 2019 Long Term Incentive and Equity Award Plan \| Performance Based Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period	30 days
Weighted average share price	$ 11.75
Vesting percentage	100.00%
Remaining shares vesting period	12 months

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

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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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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Description of service or performance condition required to be met for earning right to award under share-based payment arrangement. Includes, but is not limited to, combination of market, performance or service condition.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Percentage of vesting of award under share-based payment arrangement.

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