Fair Value Measurements (Schedule Of Estimates Of Fair Value Of Financial Instruments) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Assets:
Securities available-for-sale	$ 362,282	$ 369,466
Securities held-to-maturity	86,518	88,937
Other securities	9,960	12,915
Accrued interest receivable	8,517	7,432
Liabilities:
Deposits	3,187,271	3,083,975
Carrying Amount [Member]
Assets:
Cash and cash equivalents	175,165	70,113
Securities available-for-sale	362,282	369,466
Securities held-to-maturity	86,518	88,937
Other securities	9,960	12,915
Net loans	2,857,802	2,843,283
Accrued interest receivable	8,517	7,432
Derivative assets	22,332	10,811
Liabilities:
Deposits	3,187,271	3,083,975
Short-term debt	156,714	154,869
Long-term debt	16,495	16,495
Derivative liabilities	22,754	10,933
Fair Value [Member]
Assets:
Cash and cash equivalents	175,165	70,113
Securities available-for-sale	362,282	369,466
Securities held-to-maturity	89,600	90,810
Other securities	9,960	12,915
Net loans	2,866,063	2,843,973
Accrued interest receivable	8,517	7,432
Derivative assets	22,332	10,811
Liabilities:
Deposits	3,194,839	3,085,908
Short-term debt	156,719	154,872
Long-term debt	16,460	16,457
Derivative liabilities	22,754	10,933
Level 1 [Member]
Assets:
Cash and cash equivalents	175,165	70,113
Securities available-for-sale	4,805	4,785
Securities held-to-maturity	0	0
Other securities	0	0
Net loans	0	0
Accrued interest receivable	8,517	7,432
Derivative assets	0	0
Liabilities:
Deposits	2,158,871	2,066,419
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	355,363	362,585
Securities held-to-maturity	89,600	90,810
Other securities	9,960	12,915
Net loans	0	0
Accrued interest receivable	0	0
Derivative assets	22,332	10,811
Liabilities:
Deposits	1,035,968	1,019,489
Short-term debt	156,719	154,872
Long-term debt	16,460	16,457
Derivative liabilities	22,754	10,933
Level 3 [Member]
Assets:
Cash and cash equivalents	0	0
Securities available-for-sale	2,114	2,096
Securities held-to-maturity	0	0
Other securities	0	0
Net loans	2,866,063	2,843,973
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