Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Allowance for credit loss	$ 15,474	$ 12,781
Common shares, shares authorized (shares)	63,000,000	63,000,000
Common shares, shares issued (shares)	33,599,000	33,550,000
Preferred shares, shares authorized (shares)	1,000,000	1,000,000
Preferred shares, shares issued (shares)	0	0
Treasury shares, at cost (shares)	45,000	207,000