Investment Securities (Summary Of Amortized Cost And Fair Value Of Investment Securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Investment [Line Items]
Securities available for sale, Amortized Cost	$ 774,090	$ 619,293
Securities available for sale, Unrealized Gains	7,457	9,016
Securities available for sale, Unrealized Losses	8,908	5,815
Securities available for sale	772,639	622,494
Securities held to maturity, Amortized Cost	320,820	294,438
Securities held to maturity, Unrealized Gains	4,801	4,377
Securities held to maturity, Unrealized Losses	748	120
Securities held to maturity, fair value	324,873	298,695
U.S. Government Agencies And Government Sponsored Enterprises [Member]
Investment [Line Items]
Securities available for sale, Amortized Cost	271,774	160,334
Securities available for sale, Unrealized Gains	777	1,116
Securities available for sale, Unrealized Losses	2,474	975
Securities available for sale	270,077	160,475
State And Political Subdivisions [Member]
Investment [Line Items]
Securities held to maturity, Amortized Cost	289,713	277,273
Securities held to maturity, Unrealized Gains	4,790	4,231
Securities held to maturity, Unrealized Losses	451	120
Securities held to maturity, fair value	294,052	281,384
Mortgage-Backed Securities [Member]
Investment [Line Items]
Securities available for sale, Amortized Cost	502,316	458,959
Securities available for sale, Unrealized Gains	6,455	7,669
Securities available for sale, Unrealized Losses	6,434	4,840
Securities available for sale	502,337	461,788
Securities held to maturity, Amortized Cost	31,107	17,165
Securities held to maturity, Unrealized Gains	11	146
Securities held to maturity, Unrealized Losses	297
Securities held to maturity, fair value	30,821	17,311
Mortgage-Backed Securities [Member] \| Federal National Mortgage Association [Member]
Investment [Line Items]
Securities available for sale, Amortized Cost	227,129	184,857
Securities available for sale, Unrealized Gains	1,933	2,344
Securities available for sale, Unrealized Losses	2,307	1,264
Securities available for sale	226,755	185,937
Securities held to maturity, Amortized Cost	9,280	3,279
Securities held to maturity, Unrealized Gains	6	24
Securities held to maturity, Unrealized Losses	86
Securities held to maturity, fair value	9,200	3,303
Mortgage-Backed Securities [Member] \| Federal Home Loan Mortgage Corporation [Member]
Investment [Line Items]
Securities available for sale, Amortized Cost	28,840	29,478
Securities available for sale, Unrealized Gains	501	799
Securities available for sale, Unrealized Losses	204	7
Securities available for sale	29,137	30,270
Mortgage-Backed Securities [Member] \| Government National Mortgage Association [Member]
Investment [Line Items]
Securities available for sale, Amortized Cost	43,804	48,800
Securities available for sale, Unrealized Gains	1,728	2,022
Securities available for sale	45,532	50,822
Securities held to maturity, Amortized Cost	21,827	13,886
Securities held to maturity, Unrealized Gains	5	122
Securities held to maturity, Unrealized Losses	211
Securities held to maturity, fair value	21,621	14,008
Collateralized Mortgage Obligations [Member]
Investment [Line Items]
Securities available for sale, Amortized Cost	202,543	195,824
Securities available for sale, Unrealized Gains	2,293	2,504
Securities available for sale, Unrealized Losses	3,923	3,569
Securities available for sale	200,913	194,759
Collateralized Mortgage Obligations [Member] \| Federal National Mortgage Association [Member]
Investment [Line Items]
Securities available for sale, Amortized Cost	83,447	76,247
Securities available for sale, Unrealized Gains	514	489
Securities available for sale, Unrealized Losses	1,132	944
Securities available for sale	82,829	75,792
Collateralized Mortgage Obligations [Member] \| Federal Home Loan Mortgage Corporation [Member]
Investment [Line Items]
Securities available for sale, Amortized Cost	95,268	89,623
Securities available for sale, Unrealized Gains	186	199
Securities available for sale, Unrealized Losses	2,752	2,585
Securities available for sale	92,702	87,237
Collateralized Mortgage Obligations [Member] \| Government National Mortgage Association [Member]
Investment [Line Items]
Securities available for sale, Amortized Cost	23,828	29,954
Securities available for sale, Unrealized Gains	470	598
Securities available for sale, Unrealized Losses	39	40
Securities available for sale	24,259	30,512
Collateralized Mortgage Obligations [Member] \| Privately Issued [Member]
Investment [Line Items]
Securities available for sale, Unrealized Gains	1,123	1,218
Securities available for sale	1,123	1,218
Asset-Backed Securities [Member]
Investment [Line Items]
Securities available for sale, Unrealized Gains	225	231
Securities available for sale	$ 225	$ 231

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

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