Loans And Allowance For Loan Losses (Schedule Of Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 1,062,520	$ 1,307,572
Unpaid Principal Balance	1,243,401	1,677,119
Related Allowance	84,775	109,484
Average Recorded Investment in Impaired Loans	1,193,641	1,208,618	999,200
Interest income recognized	22,865	18,364
Home Equity Lines [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	8,747	10,943
Unpaid Principal Balance	8,747	12,389
Related Allowance	195	93
Average Recorded Investment in Impaired Loans	9,882	6,562
Interest income recognized	237	17
Consumer Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	50,239	39,736
Unpaid Principal Balance	51,255	38,748
Related Allowance	880	2,306
Average Recorded Investment in Impaired Loans	41,910	24,238
Interest income recognized	1,300	660
Credit Cards [Member]
Financing Receivable, Impaired [Line Items]
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
Small Business [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,333	156
Unpaid Principal Balance	3,333	156
Related Allowance	184	4
Average Recorded Investment in Impaired Loans	1,950	132
Interest income recognized	76	4
Other Retail Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	4,580	2,281
Unpaid Principal Balance	4,588	2,283
Related Allowance	74	38
Average Recorded Investment in Impaired Loans	3,378	6,335
Interest income recognized	167	27
Investment Properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	264,790	286,975
Unpaid Principal Balance	268,469	323,748
Related Allowance	20,209	23,384
Average Recorded Investment in Impaired Loans	273,795	300,041
Interest income recognized	6,144	6,773
1-4 Family Properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	155,000	283,512
Unpaid Principal Balance	235,374	443,274
Related Allowance	11,414	23,499
Average Recorded Investment in Impaired Loans	238,963	279,870
Interest income recognized	4,347	2,859
Land Acquisition [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	265,288	299,670
Unpaid Principal Balance	330,624	414,430
Related Allowance	27,325	17,564
Average Recorded Investment in Impaired Loans	255,188	271,644
Interest income recognized	2,018	2,136
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	685,078	870,157
Unpaid Principal Balance	834,467	1,181,452
Related Allowance	58,948	64,447
Average Recorded Investment in Impaired Loans	767,946	851,555
Interest income recognized	12,509	11,768
Commercial And Industrial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	310,543	384,299
Unpaid Principal Balance	341,011	442,091
Related Allowance	24,494	42,596
Average Recorded Investment in Impaired Loans	368,575	319,796
Interest income recognized	8,576	5,888
Retail [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	66,899	53,116
Unpaid Principal Balance	67,923	53,576
Related Allowance	1,333	2,441
Average Recorded Investment in Impaired Loans	57,120	37,267
Interest income recognized	1,780	704
With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	143,915	450,520
Unpaid Principal Balance	310,784	796,652
Related Allowance	0	0
Average Recorded Investment in Impaired Loans	373,750	484,097
Interest income recognized	0	0	0
With No Related Allowance Recorded [Member] | Home Equity Lines [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	51	3,948
Unpaid Principal Balance	51	5,394
Related Allowance	0	0
Average Recorded Investment in Impaired Loans	2,811	4,450
Interest income recognized	0	0
With No Related Allowance Recorded [Member] | Consumer Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,247	4,970
Unpaid Principal Balance	2,263	6,293
Related Allowance	0	0
Average Recorded Investment in Impaired Loans	3,706	3,907
Interest income recognized	0	0
With No Related Allowance Recorded [Member] | Credit Cards [Member]
Financing Receivable, Impaired [Line Items]
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
With No Related Allowance Recorded [Member] | Small Business [Member]
Financing Receivable, Impaired [Line Items]
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
With No Related Allowance Recorded [Member] | Other Retail Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	7	736
Unpaid Principal Balance	15	738
Related Allowance	0	0
Average Recorded Investment in Impaired Loans	127	68
Interest income recognized	0	0
With No Related Allowance Recorded [Member] | Investment Properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	10,939	59,930
Unpaid Principal Balance	14,130	96,238
Related Allowance	0	0
Average Recorded Investment in Impaired Loans	42,947	67,324
Interest income recognized	0	0
With No Related Allowance Recorded [Member] | 1-4 Family Properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	40,793	118,756
Unpaid Principal Balance	117,869	274,959
Related Allowance	0	0
Average Recorded Investment in Impaired Loans	97,434	158,763
Interest income recognized	0	0
With No Related Allowance Recorded [Member] | Land Acquisition [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	59,697	196,823
Unpaid Principal Balance	125,023	295,562
Related Allowance	0	0
Average Recorded Investment in Impaired Loans	158,015	174,590
Interest income recognized	0	0
With No Related Allowance Recorded [Member] | Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	111,429	375,509
Unpaid Principal Balance	257,022	666,759
Related Allowance	0	0
Average Recorded Investment in Impaired Loans	298,396	400,677
Interest income recognized	0	0
With No Related Allowance Recorded [Member] | Commercial And Industrial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	31,181	65,357
Unpaid Principal Balance	51,433	117,468
Related Allowance	0	0
Average Recorded Investment in Impaired Loans	68,710	74,995
Interest income recognized	0	0
With No Related Allowance Recorded [Member] | Retail [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,305	9,654
Unpaid Principal Balance	2,329	12,425
Related Allowance	0	0
Average Recorded Investment in Impaired Loans	6,644	8,425
Interest income recognized	0	0
With Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	918,605	857,052
Unpaid Principal Balance	932,617	880,467
Related Allowance	84,775	109,484
Average Recorded Investment in Impaired Loans	819,891	724,521
Interest income recognized	22,865	18,364
With Allowance Recorded [Member] | Home Equity Lines [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	8,696	6,995
Unpaid Principal Balance	8,696	6,995
Related Allowance	195	93
Average Recorded Investment in Impaired Loans	7,071	2,112
Interest income recognized	237	17
With Allowance Recorded [Member] | Consumer Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	48,992	34,766
Unpaid Principal Balance	48,992	32,455
Related Allowance	880	2,306
Average Recorded Investment in Impaired Loans	38,204	20,331
Interest income recognized	1,300	660
With Allowance Recorded [Member] | Credit Cards [Member]
Financing Receivable, Impaired [Line Items]
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
With Allowance Recorded [Member] | Small Business [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,333	156
Unpaid Principal Balance	3,333	156
Related Allowance	184	4
Average Recorded Investment in Impaired Loans	1,950	132
Interest income recognized	76	4
With Allowance Recorded [Member] | Other Retail Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	4,573	1,545
Unpaid Principal Balance	4,573	1,545
Related Allowance	74	38
Average Recorded Investment in Impaired Loans	3,251	6,267
Interest income recognized	167	27
With Allowance Recorded [Member] | Investment Properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	253,851	227,045
Unpaid Principal Balance	254,339	227,510
Related Allowance	20,209	23,384
Average Recorded Investment in Impaired Loans	230,848	232,717
Interest income recognized	6,144	6,773
With Allowance Recorded [Member] | 1-4 Family Properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	114,207	164,756
Unpaid Principal Balance	117,505	168,315
Related Allowance	11,414	23,499
Average Recorded Investment in Impaired Loans	141,529	121,107
Interest income recognized	4,347	2,859
With Allowance Recorded [Member] | Land Acquisition [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	205,591	102,847
Unpaid Principal Balance	205,601	118,868
Related Allowance	27,325	17,564
Average Recorded Investment in Impaired Loans	97,173	97,054
Interest income recognized	2,018	2,136
With Allowance Recorded [Member] | Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	573,649	494,648
Unpaid Principal Balance	577,445	514,693
Related Allowance	58,948	64,447
Average Recorded Investment in Impaired Loans	469,550	450,878
Interest income recognized	12,509	11,768
With Allowance Recorded [Member] | Commercial And Industrial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	279,362	318,942
Unpaid Principal Balance	289,578	324,623
Related Allowance	24,494	42,596
Average Recorded Investment in Impaired Loans	299,865	244,801
Interest income recognized	8,576	5,888
With Allowance Recorded [Member] | Retail [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	65,594	43,462
Unpaid Principal Balance	65,594	41,151
Related Allowance	1,333	2,441
Average Recorded Investment in Impaired Loans	50,476	28,842
Interest income recognized	$ 1,780	$ 708