Common Stock Incentive Plan - Restricted Stock (Details) - Restricted Stock - USD ($) $ in Millions	1 Months Ended	3 Months Ended
May 31, 2019	Mar. 31, 2020
Common Stock Incentive Plan
Shares granted in period (in shares)		62,873
Vesting period (in years)		4 years
Unamortized share-based compensation expense		$ 12.4
Former CEO \| Vest immediately
Common Stock Incentive Plan
Shares granted in period (in shares)	4,541

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

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