Share Repurchase Plan (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Sep. 16, 2019
Equity, Class of Treasury Stock [Line Items]
Repurchased common shares (in shares)		71,936	411,430	385,840
Cost to repurchase common shares		$ 2,835,000	$ 12,559,000	$ 15,122,000
September 16, 2019 Plan
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount					$ 50,000,000
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