Loans And Allowance For Loan Losses (Schedule Of Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	$ 94,001	$ 143,915
Unpaid Principal Balance, With no related allowance recorded	181,809	310,784
Related Allowance, With no related allowance recorded	0	0
Average Recorded Investment, With no related allowance recorded	122,367	373,750
Interest Income Recognized, With no related allowance recorded	0	0
Recorded Investment, With allowance recorded	742,553	918,605
Unpaid Principal Balance, With allowance recorded	782,252	932,617
Related Allowance, With allowance recorded	67,997	84,775
Average Recorded Investment, With allowance recorded	829,865	819,891
Interest Income Recognized, With allowance recorded	21,114	22,865
Recorded Investment	836,554	1,062,520
Unpaid Principal Balance	964,061	1,243,401
Related Allowance	67,997	84,775
Average Recorded Investment in Impaired Loans	952,232	1,193,641	1,210,000
Interest Income Recognized	21,114	22,865
Home Equity Lines [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	0	51
Unpaid Principal Balance, With no related allowance recorded	0	51
Related Allowance, With no related allowance recorded	0	0
Average Recorded Investment, With no related allowance recorded	33	2,811
Interest Income Recognized, With no related allowance recorded	0	0
Recorded Investment, With allowance recorded	2,750	8,696
Unpaid Principal Balance, With allowance recorded	2,750	8,696
Related Allowance, With allowance recorded	116	195
Average Recorded Investment, With allowance recorded	4,668	7,071
Interest Income Recognized, With allowance recorded	176	237
Recorded Investment	2,750	8,747
Unpaid Principal Balance	2,750	8,747
Related Allowance	116	195
Average Recorded Investment in Impaired Loans	4,701	9,882
Interest Income Recognized	176	237
Consumer Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	1,180	1,247
Unpaid Principal Balance, With no related allowance recorded	2,840	2,263
Related Allowance, With no related allowance recorded	0	0
Average Recorded Investment, With no related allowance recorded	1,487	3,706
Interest Income Recognized, With no related allowance recorded	0	0
Recorded Investment, With allowance recorded	44,019	50,261
Unpaid Principal Balance, With allowance recorded	44,019	50,261
Related Allowance, With allowance recorded	967	880
Average Recorded Investment, With allowance recorded	48,674	38,912
Interest Income Recognized, With allowance recorded	1,910	1,300
Recorded Investment	45,199	51,508
Unpaid Principal Balance	46,859	52,524
Related Allowance	967	880
Average Recorded Investment in Impaired Loans	50,161	42,618
Interest Income Recognized	1,910	1,300
Credit Cards [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	0	0
Unpaid Principal Balance, With no related allowance recorded	0	0
Related Allowance, With no related allowance recorded	0	0
Average Recorded Investment, With no related allowance recorded	0	0
Interest Income Recognized, With no related allowance recorded	0	0
Recorded Investment, With allowance recorded	0	0
Unpaid Principal Balance, With allowance recorded	0	0
Related Allowance, With allowance recorded	0	0
Average Recorded Investment, With allowance recorded	0	0
Interest Income Recognized, With allowance recorded	0	0
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment in Impaired Loans	0	0
Interest Income Recognized	0	0
Other Retail Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	0	7
Unpaid Principal Balance, With no related allowance recorded	0	15
Related Allowance, With no related allowance recorded	0	0
Average Recorded Investment, With no related allowance recorded	4	127
Interest Income Recognized, With no related allowance recorded	0	0
Recorded Investment, With allowance recorded	7,013	3,304
Unpaid Principal Balance, With allowance recorded	7,013	3,304
Related Allowance, With allowance recorded	109	74
Average Recorded Investment, With allowance recorded	5,555	2,543
Interest Income Recognized, With allowance recorded	285	167
Recorded Investment	7,013	3,311
Unpaid Principal Balance	7,013	3,319
Related Allowance	109	74
Average Recorded Investment in Impaired Loans	5,559	2,670
Interest Income Recognized	285	167
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	54,492	111,429
Unpaid Principal Balance, With no related allowance recorded	124,031	257,022
Related Allowance, With no related allowance recorded	0	0
Average Recorded Investment, With no related allowance recorded	82,932	298,396
Interest Income Recognized, With no related allowance recorded	0	0
Recorded Investment, With allowance recorded	483,244	573,649
Unpaid Principal Balance, With allowance recorded	512,317	577,445
Related Allowance, With allowance recorded	46,737	58,948
Average Recorded Investment, With allowance recorded	533,729	469,550
Interest Income Recognized, With allowance recorded	11,438	12,509
Recorded Investment	537,736	685,078
Unpaid Principal Balance	636,348	834,467
Related Allowance	46,737	58,948
Average Recorded Investment in Impaired Loans	616,661	767,946
Interest Income Recognized	11,438	12,509
Investment Properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	14,218	10,939
Unpaid Principal Balance, With no related allowance recorded	15,820	14,130
Related Allowance, With no related allowance recorded	0	0
Average Recorded Investment, With no related allowance recorded	18,046	42,947
Interest Income Recognized, With no related allowance recorded	0	0
Recorded Investment, With allowance recorded	185,152	253,851
Unpaid Principal Balance, With allowance recorded	192,859	254,339
Related Allowance, With allowance recorded	8,822	20,209
Average Recorded Investment, With allowance recorded	226,308	230,848
Interest Income Recognized, With allowance recorded	5,043	6,144
Recorded Investment	199,370	264,790
Unpaid Principal Balance	208,679	268,469
Related Allowance	8,822	20,209
Average Recorded Investment in Impaired Loans	244,354	273,795
Interest Income Recognized	5,043	6,144
1-4 Family Properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	9,679	40,793
Unpaid Principal Balance, With no related allowance recorded	29,741	117,869
Related Allowance, With no related allowance recorded	0	0
Average Recorded Investment, With no related allowance recorded	23,879	97,434
Interest Income Recognized, With no related allowance recorded	0	0
Recorded Investment, With allowance recorded	115,063	114,207
Unpaid Principal Balance, With allowance recorded	117,410	117,505
Related Allowance, With allowance recorded	11,126	11,414
Average Recorded Investment, With allowance recorded	115,614	141,529
Interest Income Recognized, With allowance recorded	3,464	4,347
Recorded Investment	124,742	155,000
Unpaid Principal Balance	147,151	235,374
Related Allowance	11,126	11,414
Average Recorded Investment in Impaired Loans	139,493	238,963
Interest Income Recognized	3,464	4,347
Land Acquisition [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	30,595	59,697
Unpaid Principal Balance, With no related allowance recorded	78,470	125,023
Related Allowance, With no related allowance recorded	0	0
Average Recorded Investment, With no related allowance recorded	41,007	158,015
Interest Income Recognized, With no related allowance recorded	0	0
Recorded Investment, With allowance recorded	183,029	205,591
Unpaid Principal Balance, With allowance recorded	202,048	205,601
Related Allowance, With allowance recorded	26,789	27,325
Average Recorded Investment, With allowance recorded	191,807	97,173
Interest Income Recognized, With allowance recorded	2,931	2,018
Recorded Investment	213,624	265,288
Unpaid Principal Balance	280,518	330,624
Related Allowance	26,789	27,325
Average Recorded Investment in Impaired Loans	232,814	255,188
Interest Income Recognized	2,931	2,018
Commercial And Industrial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	38,329	31,181
Unpaid Principal Balance, With no related allowance recorded	54,938	51,433
Related Allowance, With no related allowance recorded	0	0
Average Recorded Investment, With no related allowance recorded	37,911	68,710
Interest Income Recognized, With no related allowance recorded	0	0
Recorded Investment, With allowance recorded	205,527	282,695
Unpaid Principal Balance, With allowance recorded	216,153	292,911
Related Allowance, With allowance recorded	20,068	24,678
Average Recorded Investment, With allowance recorded	237,239	301,815
Interest Income Recognized, With allowance recorded	7,305	8,652
Recorded Investment	243,856	313,876
Unpaid Principal Balance	271,091	344,344
Related Allowance	20,068	24,678
Average Recorded Investment in Impaired Loans	275,150	370,525
Interest Income Recognized	7,305	8,652
Commercial, Financial and Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	13,490	18,618
Unpaid Principal Balance, With no related allowance recorded	22,312	34,753
Related Allowance, With no related allowance recorded	0	0
Average Recorded Investment, With no related allowance recorded	15,355	40,947
Interest Income Recognized, With no related allowance recorded	0	0
Recorded Investment, With allowance recorded	112,291	161,711
Unpaid Principal Balance, With allowance recorded	117,049	163,472
Related Allowance, With allowance recorded	15,364	17,186
Average Recorded Investment, With allowance recorded	126,242	164,905
Interest Income Recognized, With allowance recorded	3,534	3,974
Recorded Investment	125,781	180,329
Unpaid Principal Balance	139,361	198,225
Related Allowance	15,364	17,186
Average Recorded Investment in Impaired Loans	141,597	205,852
Interest Income Recognized	3,534	3,974
Owner-Occupied [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	24,839	12,563
Unpaid Principal Balance, With no related allowance recorded	32,626	16,680
Related Allowance, With no related allowance recorded	0	0
Average Recorded Investment, With no related allowance recorded	22,556	27,763
Interest Income Recognized, With no related allowance recorded	0	0
Recorded Investment, With allowance recorded	87,567	117,651
Unpaid Principal Balance, With allowance recorded	93,435	126,106
Related Allowance, With allowance recorded	4,368	7,308
Average Recorded Investment, With allowance recorded	106,865	134,960
Interest Income Recognized, With allowance recorded	3,609	4,602
Recorded Investment	112,406	130,214
Unpaid Principal Balance	126,061	142,786
Related Allowance	4,368	7,308
Average Recorded Investment in Impaired Loans	129,421	162,723
Interest Income Recognized	3,609	4,602
Small Business [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	0	0
Unpaid Principal Balance, With no related allowance recorded	0	0
Related Allowance, With no related allowance recorded	0	0
Average Recorded Investment, With no related allowance recorded	0	0
Interest Income Recognized, With no related allowance recorded	0	0
Recorded Investment, With allowance recorded	5,669	3,333
Unpaid Principal Balance, With allowance recorded	5,669	3,333
Related Allowance, With allowance recorded	336	184
Average Recorded Investment, With allowance recorded	4,132	1,950
Interest Income Recognized, With allowance recorded	162	76
Recorded Investment	5,669	3,333
Unpaid Principal Balance	5,669	3,333
Related Allowance	336	184
Average Recorded Investment in Impaired Loans	4,132	1,950
Interest Income Recognized	162	76
Retail [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	1,180	1,305
Unpaid Principal Balance, With no related allowance recorded	2,840	2,329
Related Allowance, With no related allowance recorded	0	0
Average Recorded Investment, With no related allowance recorded	1,524	6,644
Interest Income Recognized, With no related allowance recorded	0	0
Recorded Investment, With allowance recorded	53,782	62,261
Unpaid Principal Balance, With allowance recorded	53,782	62,261
Related Allowance, With allowance recorded	1,192	1,149
Average Recorded Investment, With allowance recorded	58,897	48,526
Interest Income Recognized, With allowance recorded	2,371	1,704
Recorded Investment	54,962	63,566
Unpaid Principal Balance	56,622	64,590
Related Allowance	1,192	1,149
Average Recorded Investment in Impaired Loans	60,421	55,170
Interest Income Recognized	$ 2,371	$ 1,704