Fair Value Measurements (Schedule Of Estimates Of Fair Value Of Financial Instruments) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Assets:
Securities available-for-sale	$ 796,237	$ 721,796
Securities held-to-maturity	53,362	60,827
Other Investment Securities	28,014	30,268
Accrued interest receivable	12,719	12,424
Liabilities:
Deposits	4,031,636	3,975,559
Carrying Amount
Assets:
Cash and cash equivalents	168,719	122,991
Securities available-for-sale	796,237	721,796
Securities held-to-maturity	53,362	60,827
Other Investment Securities	12,021	11,771
Net loans	3,505,572	3,571,642
Accrued interest receivable	12,719	12,424
Derivative assets	18,115	17,100
Liabilities:
Deposits	4,031,636	3,975,559
Short-term debt	207,033	261,911
Long-term debt	4,054	4,053
Interest Payable	2,941	2,117
Derivative liabilities	18,173	16,905
Fair Value
Assets:
Cash and cash equivalents	168,719	122,991
Securities available-for-sale	796,237	721,796
Securities held-to-maturity	54,677	60,706
Other Investment Securities	12,021	11,771
Net loans	3,494,652	3,516,557
Accrued interest receivable	12,719	12,424
Derivative assets	18,115	17,100
Liabilities:
Deposits	4,052,058	3,985,534
Short-term debt	207,033	261,911
Long-term debt	4,117	4,115
Interest Payable	2,941	2,117
Derivative liabilities	18,173	16,905
Level 1
Assets:
Cash and cash equivalents	168,719	122,991
Securities available-for-sale	0	0
Securities held-to-maturity	0	0
Other Investment Securities	7,618	7,365
Net loans	0	0
Accrued interest receivable	12,719	12,424
Derivative assets	0	0
Liabilities:
Deposits	2,664,645	2,622,905
Short-term debt	0	0
Long-term debt	0	0
Interest Payable	2,941	2,117
Derivative liabilities	0	0
Level 2
Assets:
Cash and cash equivalents	0	0
Securities available-for-sale	795,976	721,535
Securities held-to-maturity	54,677	60,706
Other Investment Securities	4,403	4,406
Net loans	0	0
Accrued interest receivable	0	0
Derivative assets	18,115	17,100
Liabilities:
Deposits	1,387,413	1,362,629
Short-term debt	207,033	261,911
Long-term debt	4,117	4,115
Interest Payable	0	0
Derivative liabilities	18,173	16,905
Level 3
Assets:
Cash and cash equivalents	0	0
Securities available-for-sale	261	261
Securities held-to-maturity	0	0
Other Investment Securities	0	0
Net loans	3,494,652	3,516,557
Accrued interest receivable	0	0
Derivative assets	0	0
Liabilities:
Deposits	0	0
Short-term debt	0	0
Long-term debt	0	0
Interest Payable	0	0
Derivative liabilities	$ 0	$ 0