Other Real Estate Owned (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Other Real Estate Owned Rollforward
Balance at beginning of the period	$ 73,272	$ 113,940	$ 83,146	$ 122,072
Write-downs in value	(767)	(1,003)	(2,750)	(3,888)
Additions	19,088	1,508	44,003	19,877
Sales	(14,322)	(13,801)	(47,026)	(37,513)
Other adjustments	(443)	(52)	(545)	44
Ending balance	76,828	100,592	76,828	100,592
Mortgages
Other Real Estate Owned Rollforward
Balance at beginning of the period	58,691	97,458	69,932	105,113
Write-downs in value	(245)	(843)	(1,764)	(2,414)
Additions	17,395	1,467	36,335	17,716
Sales	(12,588)	(12,416)	(40,967)	(34,845)
Other adjustments	(660)	4	(943)	100
Ending balance	62,593	85,670	62,593	85,670
Commercial / Construction
Other Real Estate Owned Rollforward
Balance at beginning of the period	14,581	16,482	13,214	16,959
Write-downs in value	(522)	(160)	(986)	(1,474)
Additions	1,693	41	7,668	2,161
Sales	(1,734)	(1,385)	(6,059)	(2,668)
Other adjustments	217	(56)	398	(56)
Ending balance	$ 14,235	$ 14,922	$ 14,235	$ 14,922