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Fair Value (Carrying Amounts and Estimated Fair Values of Company's Financial Instruments) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Financial Assets:
Interest Bearing Time Deposits with Banks	$ 500	$ 500
Financial Liabilities:
Demand, Savings, and Money Market Deposits	(5,252,963)	(5,350,051)
Time Deposits	(767,042)	(428,469)
Long-term Debt	(89,545)
Carrying Value
Financial Assets:
Cash and Short-term Investments	115,330	117,381
Interest Bearing Time Deposits with Banks	500	500
Loans, Net	3,918,184	3,724,804
Accrued Interest Receivable	30,595	27,741
Financial Liabilities:
Demand, Savings, and Money Market Deposits	(4,485,921)	(4,921,582)
Time Deposits	(767,042)	(428,469)
Short-term Borrowings	(65,968)	(101,161)
Long-term Debt	(127,969)	(102,645)
Accrued Interest Payable	(7,073)	(1,513)
Fair Value
Financial Assets:
Cash and Short-term Investments	115,330	117,381
Interest Bearing Time Deposits with Banks	500	500
Loans, Net	3,801,738	3,688,903
Accrued Interest Receivable	30,595	27,741
Financial Liabilities:
Demand, Savings, and Money Market Deposits	(4,485,921)	(4,921,582)
Time Deposits	(759,217)	(426,184)
Short-term Borrowings	(65,968)	(101,161)
Long-term Debt	(127,084)	(99,102)
Accrued Interest Payable	(7,073)	(1,513)
Fair Value | Level 1
Financial Assets:
Cash and Short-term Investments	78,805	75,476
Interest Bearing Time Deposits with Banks	0	0
Loans, Net	0	0
Accrued Interest Receivable	0	38
Financial Liabilities:
Demand, Savings, and Money Market Deposits	(4,485,921)	(4,921,582)
Time Deposits	0	0
Short-term Borrowings	(25,000)	(36,200)
Long-term Debt	0	0
Accrued Interest Payable	0	0
Fair Value | Level 2
Financial Assets:
Cash and Short-term Investments	36,525	41,905
Interest Bearing Time Deposits with Banks	500	500
Loans, Net	0	0
Accrued Interest Receivable	10,014	10,863
Financial Liabilities:
Demand, Savings, and Money Market Deposits	0	0
Time Deposits	(759,217)	(426,184)
Short-term Borrowings	(40,968)	(64,961)
Long-term Debt	(52,522)	(26,830)
Accrued Interest Payable	(6,701)	(1,205)
Fair Value | Level 3
Financial Assets:
Cash and Short-term Investments	0	0
Interest Bearing Time Deposits with Banks	0	0
Loans, Net	3,801,738	3,688,903
Accrued Interest Receivable	20,581	16,840
Financial Liabilities:
Demand, Savings, and Money Market Deposits	0	0
Time Deposits	0	0
Short-term Borrowings	0	0
Long-term Debt	(74,562)	(72,272)
Accrued Interest Payable	$ (372)	$ (308)

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