Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Number of nonvested restricted common shares outstanding at beginning of period (in shares)			461,371	321,134
Weighted average grant date fair value of nonvested restricted common shares outstanding at beginning of period (in usd per share)			$ 18.75	$ 18.04
Number of restricted common shares granted during period under equity incentive plan (in shares)			367,489	277,107
Weighted average grant date fair value of restricted common shares granted during period under equity incentive plan (in usd per share)			$ 15.92	$ 19.31
Number of restricted common shares vested during period (in shares)			(221,616)	(136,870)
Weighted average grant date fair value of restricted common shares vested during period (in usd per share)			$ (18.75)	$ (18.20)
Number of restricted common shares forfeited during period (in shares)			(15,612)	0
Weighted average grant date fair value of restricted common shares forfeited during period (in usd per share)			$ (18.68)	$ 0
Number of nonvested restricted common shares outstanding at end of period (in shares)	591,632	461,371	591,632	461,371
Weighted average grant date fair value of nonvested restricted common shares outstanding at end of period (in usd per share)	$ 16.99	$ 18.75	$ 16.99	$ 18.75
Equity based compensation	$ 1.3	$ 1.3	$ 2.7	$ 2.4

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

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