Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities (Details Textuals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities (Textuals) [Line Items]
Allowances and Reserve Balance	$ 39,776	$ 47,776
Expense Related to Qualified Affordable Housing Projects	33,000	23,000	$ 19,000
Remaining Investment in Qualified Affordable Housing Projects	262,000	268,000
Unfunded Equity Contributions Obligation Amount	80,000	118,000
Loans repurchased under make whole requests	8,000	10,000
Loans Sold To Outside Investors Loss Reimbursement Settlement Paid	114
Loans sold to outside investors original amount	16,100,000
Loans sold to outside investors remaining outstanding amount	6,500,000
Mortgage Repurchase Reserve	1,000	2,000
Residential mortgage loans sold with recourse risk	10,000	36,000
Residential mortgage loans sold with credit recourse risk	24,000	33,000
Community Reinvestment, Obtaining Tax Credits, and Other Tax Benefits [Member]
Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities (Textuals) [Line Items]
Carrying value of investments	268,000	272,000
Tax Credit and Other Investments
Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities (Textuals) [Line Items]
Carrying value of investments	$ 25,000	$ 25,000