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Fair Value (Carrying Amounts and Estimated Fair Values of Company's Financial Instruments) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financial Assets:
Interest Bearing Time Deposits with Banks	$ 745	$ 1,241
Financial Liabilities:
Time Deposits	(347,099)	(494,452)
Short-term Borrowings	(68,328)	(52,905)
Long-term Debt	(83,855)	(141,624)
Level 1
Financial Assets:
Loans, Net	0	0
Level 2
Financial Assets:
Loans, Net	0	0
Level 3
Financial Assets:
Loans, Net	2,980,555	3,032,690
Reported Value Measurement
Financial Assets:
Cash and Short-term Investments	396,890	345,748
Interest Bearing Time Deposits with Banks	745	1,241
Loans, Net	2,960,728	3,026,340
Accrued Interest Receivable	20,229	20,278
Financial Liabilities:
Demand, Savings, and Money Market Deposits	4,397,217	3,612,078
Time Deposits	(347,099)	(494,452)
Short-term Borrowings	(68,328)	(52,905)
Long-term Debt	(83,855)	(141,624)
Accrued Interest Payable	(613)	(1,084)
Estimate of Fair Value Measurement
Financial Assets:
Cash and Short-term Investments	396,890	345,748
Interest Bearing Time Deposits with Banks	745	1,241
Loans, Net	2,980,555	3,032,690
Accrued Interest Receivable	20,229	20,278
Financial Liabilities:
Demand, Savings, and Money Market Deposits	4,397,217	3,612,078
Time Deposits	(347,876)	(495,171)
Short-term Borrowings	(68,328)	(52,905)
Long-term Debt	(86,623)	(143,302)
Accrued Interest Payable	(613)	(1,084)
Estimate of Fair Value Measurement | Level 1
Financial Assets:
Cash and Short-term Investments	47,173	57,972
Interest Bearing Time Deposits with Banks	0	0
Accrued Interest Receivable	0	0
Financial Liabilities:
Demand, Savings, and Money Market Deposits	4,397,217	3,612,078
Time Deposits	0	0
Short-term Borrowings	0	0
Long-term Debt	0	0
Accrued Interest Payable	0	0
Estimate of Fair Value Measurement | Level 2
Financial Assets:
Cash and Short-term Investments	349,717	287,776
Interest Bearing Time Deposits with Banks	745	1,241
Accrued Interest Receivable	9,213	6,137
Financial Liabilities:
Demand, Savings, and Money Market Deposits	0	0
Time Deposits	(347,876)	(495,171)
Short-term Borrowings	(68,328)	(52,905)
Long-term Debt	(28,320)	(88,342)
Accrued Interest Payable	(579)	(1,049)
Estimate of Fair Value Measurement | Level 3
Financial Assets:
Cash and Short-term Investments	0	0
Interest Bearing Time Deposits with Banks	0	0
Accrued Interest Receivable	11,016	14,141
Financial Liabilities:
Demand, Savings, and Money Market Deposits	0	0
Time Deposits	0	0
Short-term Borrowings	0	0
Long-term Debt	(58,303)	(54,960)
Accrued Interest Payable	$ (34)	$ (35)

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