Fair Value Measurements (Schedule Of Estimates Of Fair Value Of Financial Instruments) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Assets:
Securities available-for-sale	$ 798,930	$ 721,796
Securities held-to-maturity	51,211	60,827
Other Investment Securities	28,070	30,268
Accrued interest receivable	12,929	12,424
Liabilities:
Deposits	4,029,578	3,975,559
Carrying Amount
Assets:
Cash and cash equivalents	116,194	122,991
Securities available-for-sale	798,930	721,796
Securities held-to-maturity	51,211	60,827
Other Investment Securities	11,719	11,771
Net loans	3,569,385	3,571,642
Accrued interest receivable	12,929	12,424
Derivative assets	24,835	17,100
Liabilities:
Deposits	4,029,578	3,975,559
Short-term debt	202,622	261,911
Long-term debt	4,055	4,053
Interest Payable	2,908	2,117
Derivative liabilities	24,954	16,905
Fair Value
Assets:
Cash and cash equivalents	116,194	122,991
Securities available-for-sale	798,930	721,796
Securities held-to-maturity	52,845	60,706
Other Investment Securities	11,719	11,771
Net loans	3,570,586	3,516,557
Accrued interest receivable	12,929	12,424
Derivative assets	24,835	17,100
Liabilities:
Deposits	4,049,150	3,985,534
Short-term debt	202,622	261,911
Long-term debt	4,117	4,115
Interest Payable	2,908	2,117
Derivative liabilities	24,954	16,905
Level 1
Assets:
Cash and cash equivalents	116,194	122,991
Securities available-for-sale	0	0
Securities held-to-maturity	0	0
Other Investment Securities	7,108	7,365
Net loans	0	0
Accrued interest receivable	12,929	12,424
Derivative assets	0	0
Liabilities:
Deposits	2,674,791	2,622,905
Short-term debt	0	0
Long-term debt	0	0
Interest Payable	2,908	2,117
Derivative liabilities	0	0
Level 2
Assets:
Cash and cash equivalents	0	0
Securities available-for-sale	798,669	721,535
Securities held-to-maturity	52,845	60,706
Other Investment Securities	4,611	4,406
Net loans	0	0
Accrued interest receivable	0	0
Derivative assets	24,835	17,100
Liabilities:
Deposits	1,374,359	1,362,629
Short-term debt	202,622	261,911
Long-term debt	4,117	4,115
Interest Payable	0	0
Derivative liabilities	24,954	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	3,570,586	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