Share Repurchase Plan (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Mar. 15, 2021
Equity, Class of Treasury Stock [Line Items]
Repurchased common shares (in shares)		411,430
Cost to repurchase common shares		$ 12,559,000
September 16, 2019 Plan
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount				$ 50,000,000
Stock repurchase program, remaining authorized repurchase amount	$ 37,400,000
Repurchased common shares (in shares)	0		411,430
Cost to repurchase common shares			$ 12,600,000
Cost to repurchase common shares (in dollars per share)			$ 30.52