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Fair Value Measurements (Schedule Of Estimates Of Fair Value Of Financial Instruments) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Assets:
Estimated Fair Value	$ 1,409,513	$ 1,408,165
Marketable equity securities	24,785	25,531
Net loans	3,542,625	3,525,648
Accrued interest receivable	16,101	15,627
Liabilities:
Deposits	4,998,845	4,925,336
Carrying Amount
Assets:
Cash and cash equivalents	598,048	634,631
Estimated Fair Value	1,409,513	1,408,165
Marketable equity securities	8,489	9,211
Net loans	3,542,625	3,525,648
Accrued interest receivable	16,101	15,627
Derivative assets	38,822	29,029
Liabilities:
Deposits	4,998,845	4,925,336
Short-term debt	288,483	312,458
Accrued interest payable	491	600
Derivative liabilities	27,238	24,283
Fair Value
Assets:
Cash and cash equivalents	598,048	634,631
Estimated Fair Value	1,409,513	1,408,165
Marketable equity securities	8,489	9,211
Net loans	3,461,145	3,456,539
Accrued interest receivable	16,101	15,627
Derivative assets	38,822	29,029
Liabilities:
Deposits	4,991,704	4,926,724
Short-term debt	288,483	312,458
Accrued interest payable	491	600
Derivative liabilities	27,238	24,283
Level 1
Assets:
Cash and cash equivalents	598,048	634,631
Estimated Fair Value	0	0
Marketable equity securities	4,074	4,134
Net loans	0	0
Accrued interest receivable	16,101	15,627
Derivative assets	0	0
Liabilities:
Deposits	3,974,286	3,856,421
Short-term debt	0	0
Accrued interest payable	491	600
Derivative liabilities	0	0
Level 2
Assets:
Cash and cash equivalents	0	0
Estimated Fair Value	1,406,318	1,404,704
Marketable equity securities	4,415	5,077
Net loans	0	0
Accrued interest receivable	0	0
Derivative assets	38,822	29,029
Liabilities:
Deposits	1,017,418	1,070,303
Short-term debt	288,483	312,458
Accrued interest payable	0	0
Derivative liabilities	27,238	24,283
Level 3
Assets:
Cash and cash equivalents	0	0
Estimated Fair Value	3,195	3,461
Marketable equity securities	0	0
Net loans	3,461,145	3,456,539
Accrued interest receivable	0	0
Derivative assets	0	0
Liabilities:
Deposits	0	0
Short-term debt	0	0
Accrued interest payable	0	0
Derivative liabilities	$ 0	$ 0

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