Other Real Estate Owned and Bank Premises Held for Sale (Details)	9 Months Ended
	Sep. 30, 2021 USD ($) property	Sep. 30, 2020 USD ($)	Dec. 31, 2020 property
OREO and Bank Premises
Balance at the beginning of the period	$ 47,920,000	$ 11,964,000
Measurement period adjustment pertaining to CSFL acquisition	(1,226,000)	28,311,000
Additions	5,045,000	6,711,000
Write-downs	(1,741,000)	(770,000)
Sold	(31,235,000)	(8,232,000)
Balance at the end of the period	18,763,000	37,984,000
Other Real Estate Owned	3,687,000	13,480,000
Bank Premises Held for Sale	$ 15,076,000	$ 24,504,000
Number of properties held | property	23		42
Number of properties premises held for sale | property	15		33
Residential real estate consumer mortgage loans in foreclosure, carrying value	$ 3,500,000
Residential real estate
OREO and Bank Premises
Other Real Estate In Foreclosure	$ 446,000