Fair Value Measurements (Schedule Of Estimates Of Fair Value Of Financial Instruments) (Details) - USD ($)	Jun. 30, 2023	Dec. 31, 2022
Assets:
Estimated Fair Value	$ 1,419,933,000	$ 1,505,520,000
Marketable equity securities	29,262,000	23,807,000
Net loans	3,899,391,000	3,629,150,000
Accrued interest receivable	17,973,000	18,287,000
Derivative assets	2,050,000
Liabilities:
Deposits	5,015,063,000	4,869,866,000
Carrying Amount
Assets:
Cash and cash equivalents	231,281,000	200,000,000
Estimated Fair Value	1,419,933,000	1,505,520,000
Marketable equity securities	7,637,000	7,569,000
Net loans	3,899,391,000	3,629,150,000
Accrued interest receivable	17,973,000	18,287,000
Derivative assets	77,148,000	81,838,000
Liabilities:
Deposits	5,015,063,000	4,869,866,000
Customer repurchase agreements	271,714,000	290,964,000
Accrued interest payable	2,781,000	953,000
Derivative liabilities	59,270,000	65,057,000
Fair Value
Assets:
Cash and cash equivalents	231,281,000	200,000,000
Estimated Fair Value	1,419,933,000	1,505,520,000
Marketable equity securities	7,637,000	7,569,000
Net loans	3,754,410,000	3,491,318,000
Accrued interest receivable	17,973,000	18,287,000
Derivative assets	77,148,000	81,838,000
Liabilities:
Deposits	4,577,560,000	4,867,883,000
Customer repurchase agreements	271,714,000	290,964,000
Accrued interest payable	2,781,000	953,000
Derivative liabilities	59,270,000	65,057,000
Level 1
Assets:
Cash and cash equivalents	231,281,000	200,000,000
Estimated Fair Value	0	0
Marketable equity securities	3,551,000	3,851,000
Net loans	0	0
Accrued interest receivable	17,973,000	18,287,000
Derivative assets	0	0
Liabilities:
Deposits	3,641,957,000	3,981,766,000
Customer repurchase agreements	0	0
Accrued interest payable	2,781,000	953,000
Derivative liabilities	0	0
Level 2
Assets:
Cash and cash equivalents	0	0
Estimated Fair Value	1,417,855,000	1,503,061,000
Marketable equity securities	4,086,000	3,718,000
Net loans	0	0
Accrued interest receivable	0	0
Derivative assets	77,148,000	81,838,000
Liabilities:
Deposits	935,603,000	886,117,000
Customer repurchase agreements	271,714,000	290,964,000
Accrued interest payable	0	0
Derivative liabilities	59,270,000	65,057,000
Level 3
Assets:
Cash and cash equivalents	0	0
Estimated Fair Value	2,078,000	2,459,000
Marketable equity securities	0	0
Net loans	3,754,410,000	3,491,318,000
Accrued interest receivable	0	0
Derivative assets	0	0
Liabilities:
Deposits	0	0
Customer repurchase agreements	0	0
Accrued interest payable	0	0
Derivative liabilities	$ 0	$ 0