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Stock Based Compensation - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	9 Months Ended	12 Months Ended
	Jun. 30, 2019	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued (in shares)			30,900,000	15,890,000
Non-cash compensation expense			$ 2.2	$ 1.3	$ 1.8
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding, unvested restricted stock (in shares)			837,123	507,536	422,928	319,058
Forfeitures (in shares)			1,575	5,120	0
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding, unvested restricted stock (in shares)			2,018,518	842,792	0
Award vesting period			3 years
Fair value assumptions, expected term		3 years
2017 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional shares authorized (In shares)	7,600,000
Maximum shares issuable (in shares)			13,170,000
Common shares reserved for issuance (in shares)				3,865,174
2017 Plan | Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued (in shares)			228,750	131,975
2017 Plan | Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued (in shares)			827,126
2017 Plan | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding, unvested restricted stock (in shares)			755,286	290,373
Stock issued (in shares)				292,459
Unrecognized compensation expense			$ 3.1	$ 1.9
Weighted average period to recognize the unrecognized compensation expense			1 year 329 days
Fair value of shares vested			$ 1.3	$ 1.1	$ 1.5
Requisite service period			3 years
2017 Plan | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for issuance (in shares)			3,060,958	1,280,392
Non-cash compensation expense			$ 2.9	$ 0.9
Unrecognized compensation expense			$ 4.5	$ 2.6
Weighted average period to recognize the unrecognized compensation expense			1 year 8 months 12 days
Requisite service period			3 years
Award vesting period			3 years
Fair value assumptions, expected term			3 years	3 years
2017 Plan | Performance Shares | Relative TSR performance Is Less than the 30th percentile
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights (as a percent)			0.00%
2017 Plan | Performance Shares | Relative TSR performance Is equal to the 50th percentile
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights (as a percent)			100.00%
2010 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for issuance (in shares)			9,053,166
2010 Stock Incentive Plan | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding, unvested restricted stock (in shares)			81,837
Unrecognized compensation expense			$ 3.1	$ 1.9
Weighted average period to recognize the unrecognized compensation expense			1 year 10 months 24 days
Fair value of shares vested			$ 1.3	$ 1.1	$ 1.5
Requisite service period			3 years
Award vesting period			3 years

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