Loans and Allowance for Loan Losses (Schedule Of Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended		12 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 967,452	$ 967,452	$ 1,062,520
Unpaid Principal Balance	1,109,545	1,109,545	1,243,401
Related Allowance	76,011	76,011	84,775
Average Recorded Investment	991,086	1,012,405		1,193,641
Interest Income Recognized	5,356	10,819		22,865
Home Equity Lines [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,021	3,021	8,747
Unpaid Principal Balance	3,021	3,021	8,747
Related Allowance	185	185	195
Average Recorded Investment	4,436	6,575		9,882
Interest Income Recognized	34	112		237
Consumer Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	51,240	51,240	51,508
Unpaid Principal Balance	52,794	52,794	52,524
Related Allowance	947	947	880
Average Recorded Investment	53,267	53,807		42,618
Interest Income Recognized	492	945		1,300
Credit Card Receivable [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0	0
Unpaid Principal Balance	0	0	0
Related Allowance	0	0	0
Average Recorded Investment	0	0		0
Interest Income Recognized	0	0		0
Small Business [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,842	3,842	3,333
Unpaid Principal Balance	3,842	3,842	3,333
Related Allowance	223	223	184
Average Recorded Investment	3,486	3,494		1,950
Interest Income Recognized	37	58		76
Other Retail Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	4,230	4,230	3,311
Unpaid Principal Balance	4,238	4,238	3,319
Related Allowance	65	65	74
Average Recorded Investment	3,891	3,911		2,670
Interest Income Recognized	65	128		167
Investment Properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	254,061	254,061	264,790
Unpaid Principal Balance	268,242	268,242	268,469
Related Allowance	13,214	13,214	20,209
Average Recorded Investment	268,686	265,607		273,795
Interest Income Recognized	1,291	2,748		6,144
1-4 Family Properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	136,499	136,499	155,000
Unpaid Principal Balance	168,271	168,271	235,374
Related Allowance	14,837	14,837	11,414
Average Recorded Investment	144,754	148,948		238,963
Interest Income Recognized	821	1,664		4,347
Land Acquisition [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	233,842	233,842	265,288
Unpaid Principal Balance	305,836	305,836	330,624
Related Allowance	18,988	18,988	27,325
Average Recorded Investment	232,398	244,142		255,188
Interest Income Recognized	757	1,494		2,018
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	624,402	624,402	685,078
Unpaid Principal Balance	742,349	742,349	834,467
Related Allowance	47,039	47,039	58,948
Average Recorded Investment	645,838	658,697		767,946
Interest Income Recognized	2,869	5,906		12,509
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	280,717	280,717	310,543
Unpaid Principal Balance	303,301	303,301	341,011
Related Allowance	27,552	27,552	24,494
Average Recorded Investment	280,168	285,921		368,575
Interest Income Recognized	1,859	3,670		8,576
Retail [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	62,333	62,333	66,899
Unpaid Principal Balance	63,895	63,895	67,923
Related Allowance	1,420	1,420	1,333
Average Recorded Investment	65,080	67,787		57,120
Interest Income Recognized	628	1,243		1,780
With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	118,508	118,508	143,915
Unpaid Principal Balance	218,959	218,959	310,784
Related Allowance	0	0	0
Average Recorded Investment	133,888	139,808		373,750
Interest Income Recognized	0	0	0	0
With No Related Allowance Recorded [Member] | Home Equity Lines [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	49	49	51
Unpaid Principal Balance	49	49	51
Related Allowance	0	0	0
Average Recorded Investment	49	50		2,811
Interest Income Recognized	0	0		0
With No Related Allowance Recorded [Member] | Consumer Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,197	1,197	1,247
Unpaid Principal Balance	2,751	2,751	2,263
Related Allowance	0	0	0
Average Recorded Investment	2,040	1,765		3,706
Interest Income Recognized	0	0		0
With No Related Allowance Recorded [Member] | Credit Card Receivable [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0	0
Unpaid Principal Balance	0	0	0
Related Allowance	0	0	0
Average Recorded Investment	0	0		0
Interest Income Recognized	0	0		0
With No Related Allowance Recorded [Member] | Small Business [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0	0
Unpaid Principal Balance	0	0	0
Related Allowance	0	0	0
Average Recorded Investment	0	0		0
Interest Income Recognized	0	0		0
With No Related Allowance Recorded [Member] | Other Retail Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	2	2	7
Unpaid Principal Balance	10	10	15
Related Allowance	0	0	0
Average Recorded Investment	5	6		127
Interest Income Recognized	0	0		0
With No Related Allowance Recorded [Member] | Investment Properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	23,905	23,905	10,939
Unpaid Principal Balance	29,533	29,533	14,130
Related Allowance	0	0	0
Average Recorded Investment	22,649	18,707		42,947
Interest Income Recognized	0	0		0
With No Related Allowance Recorded [Member] | 1-4 Family Properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	17,827	17,827	40,793
Unpaid Principal Balance	40,947	40,947	117,869
Related Allowance	0	0	0
Average Recorded Investment	26,567	32,385		97,434
Interest Income Recognized	0	0		0
With No Related Allowance Recorded [Member] | Land Acquisition [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	36,253	36,253	59,697
Unpaid Principal Balance	89,284	89,284	125,023
Related Allowance	0	0	0
Average Recorded Investment	41,369	49,123		158,015
Interest Income Recognized	0	0		0
With No Related Allowance Recorded [Member] | Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	77,985	77,985	111,429
Unpaid Principal Balance	159,764	159,764	257,022
Related Allowance	0	0	0
Average Recorded Investment	90,585	100,215		298,396
Interest Income Recognized	0	0		0
With No Related Allowance Recorded [Member] | Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	39,275	39,275	31,181
Unpaid Principal Balance	56,385	56,385	51,433
Related Allowance	0	0	0
Average Recorded Investment	41,209	37,772		68,710
Interest Income Recognized	0	0		0
With No Related Allowance Recorded [Member] | Retail [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,248	1,248	1,305
Unpaid Principal Balance	2,810	2,810	2,329
Related Allowance	0	0	0
Average Recorded Investment	2,094	1,821		6,644
Interest Income Recognized	0	0		0
With Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	848,944	848,944	918,605
Unpaid Principal Balance	890,586	890,586	932,617
Related Allowance	76,011	76,011	84,775
Average Recorded Investment	857,198	872,597		819,891
Interest Income Recognized	5,356	10,819		22,865
With Allowance Recorded [Member] | Home Equity Lines [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,972	2,972	8,696
Unpaid Principal Balance	2,972	2,972	8,696
Related Allowance	185	185	195
Average Recorded Investment	4,387	6,525		7,071
Interest Income Recognized	34	112		237
With Allowance Recorded [Member] | Consumer Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	50,043	50,043	50,261
Unpaid Principal Balance	50,043	50,043	50,261
Related Allowance	947	947	880
Average Recorded Investment	51,227	52,042		38,912
Interest Income Recognized	492	945		1,300
With Allowance Recorded [Member] | Credit Card Receivable [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0	0
Unpaid Principal Balance	0	0	0
Related Allowance	0	0	0
Average Recorded Investment	0	0		0
Interest Income Recognized	0	0		0
With Allowance Recorded [Member] | Small Business [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,842	3,842	3,333
Unpaid Principal Balance	3,842	3,842	3,333
Related Allowance	223	223	184
Average Recorded Investment	3,486	3,494		1,950
Interest Income Recognized	37	58		76
With Allowance Recorded [Member] | Other Retail Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	4,228	4,228	3,304
Unpaid Principal Balance	4,228	4,228	3,304
Related Allowance	65	65	74
Average Recorded Investment	3,886	3,905		2,543
Interest Income Recognized	65	128		167
With Allowance Recorded [Member] | Investment Properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	230,156	230,156	253,851
Unpaid Principal Balance	238,709	238,709	254,339
Related Allowance	13,214	13,214	20,209
Average Recorded Investment	246,037	246,900		230,848
Interest Income Recognized	1,291	2,748		6,144
With Allowance Recorded [Member] | 1-4 Family Properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	118,672	118,672	114,207
Unpaid Principal Balance	127,324	127,324	117,505
Related Allowance	14,837	14,837	11,414
Average Recorded Investment	118,187	116,563		141,529
Interest Income Recognized	821	1,664		4,347
With Allowance Recorded [Member] | Land Acquisition [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	197,589	197,589	205,591
Unpaid Principal Balance	216,552	216,552	205,601
Related Allowance	18,988	18,988	27,325
Average Recorded Investment	191,029	195,019		97,173
Interest Income Recognized	757	1,494		2,018
With Allowance Recorded [Member] | Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	546,417	546,417	573,649
Unpaid Principal Balance	582,585	582,585	577,445
Related Allowance	47,039	47,039	58,948
Average Recorded Investment	555,253	558,482		469,550
Interest Income Recognized	2,869	5,906		12,509
With Allowance Recorded [Member] | Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	241,442	241,442	279,362
Unpaid Principal Balance	246,916	246,916	289,578
Related Allowance			24,494
Average Recorded Investment	238,959	248,149		299,865
Interest Income Recognized	1,859	3,670		8,576
With Allowance Recorded [Member] | Retail [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	61,085	61,085	65,594
Unpaid Principal Balance	61,085	61,085	65,594
Related Allowance	1,420	1,420	1,333
Average Recorded Investment	62,986	65,966		50,476
Interest Income Recognized	$ 628	$ 1,243		$ 1,780