Fair Value Measurements (Schedule Of Estimates Of Fair Value Of Financial Instruments) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Assets:
Securities available-for-sale	$ 470,098	$ 450,083
Securities held-to-maturity	72,308	75,169
Other securities	10,240	14,352
Accrued interest receivable	8,644	8,408
Liabilities:
Deposits	3,392,758	3,231,653
Carrying Amount [Member]
Assets:
Cash and cash equivalents	190,812	88,139
Securities available-for-sale	470,098	450,083
Securities held-to-maturity	72,308	75,169
Other securities	10,240	14,352
Net loans	3,054,964	3,026,496
Accrued interest receivable	8,644	8,408
Derivative assets	15,564	15,463
Liabilities:
Deposits	3,392,758	3,231,653
Short-term debt	186,686	248,305
Long-term debt	16,495	16,495
Derivative liabilities	15,509	15,483
Fair Value [Member]
Assets:
Cash and cash equivalents	190,812	88,139
Securities available-for-sale	470,098	450,083
Securities held-to-maturity	73,656	76,445
Other securities	10,240	14,352
Net loans	3,040,822	3,014,425
Accrued interest receivable	8,644	8,408
Derivative assets	15,564	15,463
Liabilities:
Deposits	2,606,844	3,232,970
Short-term debt	186,686	248,305
Long-term debt	16,453	16,455
Derivative liabilities	15,509	15,483
Level 1 [Member]
Assets:
Cash and cash equivalents	190,812	88,139
Securities available-for-sale	6,087	5,720
Securities held-to-maturity	0	0
Other securities	0	0
Net loans	0	0
Accrued interest receivable	8,644	8,408
Derivative assets	0	0
Liabilities:
Deposits	1,545,468	2,190,234
Short-term debt	0	0
Long-term debt	0	0
Derivative liabilities	0	0
Level 2 [Member]
Assets:
Cash and cash equivalents	0	0
Securities available-for-sale	463,753	441,828
Securities held-to-maturity	73,656	76,445
Other securities	10,240	14,352
Net loans	0	0
Accrued interest receivable	0	0
Derivative assets	15,564	15,463
Liabilities:
Deposits	1,061,376	1,042,736
Short-term debt	186,686	248,305
Long-term debt	16,453	16,455
Derivative liabilities	15,509	15,483
Level 3 [Member]
Assets:
Cash and cash equivalents	0	0
Securities available-for-sale	258	2,535
Securities held-to-maturity	0	0
Other securities	0	0
Net loans	3,040,822	3,014,425
Accrued interest receivable	0	0
Derivative assets	0	0
Liabilities:
Deposits	0	0
Short-term debt	0	0
Long-term debt	0	0
Derivative liabilities	$ 0	$ 0