Investment Securities - Cost and Equity Method Investments (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investment [Line Items]
Federal home loan bank stock	$ 13,413,000	$ 22,090,000
Federal reserve bank stock	14,653,000	14,653,000
Equity Securities, FV-NI	2,129,000	2,511,000
Equity Securities without Readily Determinable Fair Value, Amount	4,689,000	4,689,000
Alternative Investment	26,384,000	21,522,000
Other Investments and Securities, at Cost	$ 61,268,000	$ 65,465,000
equity investment shares sold	86,770	79,697	133,281
Proceeds from Sale of Federal Home Loan Bank Stock	$ 8,700,000	$ 8,000,000	$ 13,300,000
equity investment purchased, shares		0	128,553
Gain on equity securities, net	5,011,000	$ 2,182,000	$ 5,118,000
Payments to Acquire Federal Reserve Bank Stock			6,400,000
Alternative Investment, income recognized	4,500,000	2,400,000	4,800,000
Investments [Member]
Investment [Line Items]
Gain on equity securities, net	$ 552,000		$ 345,000
Common Stock [Member]
Investment [Line Items]
Gain on equity securities, net		$ 239,000