Share-Based Compensation - Schedule Of Restricted Stock (Details) - Restricted Stock Units (RSUs) - $ / shares	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Shares
Beginning balance (in shares)	0	398,253	123,610
Granted (in shares)	174,572	338,788	336,980
Vested (in shares)	(50,962)	(121,786)	(59,954)
Forfeited (in shares)	0	(13,783)	(2,383)
Canceled (in shares)	0	0	0
Ending balance (in shares)	123,610	601,472	398,253
Weighted Average Grant Date Fair Value
Beginning balance (in dollars per share)	$ 0	$ 19.60	$ 15.61
Granted (in dollars per share)	15.41	22.03	19.37
Vested (in dollars per share)	14.90	18.57	10.18
Forfeited (in dollars per share)	0	20.44	16.88
Canceled (in dollars per share)	0	0	0
Ending balance (in dollars per share)	$ 15.61	$ 21.16	$ 19.60