Fair Value Impaired financing receivables (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Impaired [Line Items]
Book Value Of Impaired Loans Carried At Fair Value	$ 1,291,000	$ 8,256,000
Partial Charge-Offs On Impaired Loans carried at Fair Value	240,000	269,000
Impaired Financing Receivable, Related Allowance	2,240,000	5,434,000
Impaired loans carried at fair value	1,103,000	6,924,000
Impaired Financing Receivable, loans not held at Fair Value, Recorded Investment	73,211,000	100,199,000
Partial Charge-offs on Impaired Loans carried at Cost	384,000	386,000
impaired Financing Receivable, loans not held at Fair Value, Carrying Amount	71,783,000	96,097,000
Impaired Financing Receivable, Recorded Investment	74,502,000	108,455,000	$ 77,491,000
Partial charge-offs on impaired loans	624,000	655,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	1,616,000	5,434,000
Impaired Financing Receivable, Carrying Value	72,886,000	103,021,000
Impaired Financing Receivable, carried at fair value, related expense	500,000	(4,700,000)	(200,000)
expense related to other repossessed assets	414,000	435,000	$ 0
Commercial Receivables, excluding Commercial, Financial, and Agricultural [Domain]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance	188,000	1,332,000
Financing Receivable, not collateral dependent [Domain]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Related Allowance	$ 1,428,000	$ 4,102,000