Share-Based Compensation Plans - Additional information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	$ 545,000	$ 351,000
Additional share based compensation expense	$ 232,000
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Price	$ 21.63
Incentive Plan 2015 [Member] | Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Extension of expiration period of stock options	2 years
Incentive Plan 2016 [Member] | Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Extension of expiration period of stock options	1 year