Loans and Allowance for Loan Losses (Schedule Of Current, Accruing Past Due And Nonaccrual Loans) (Details) (USD $)	Jun. 30, 2012		Dec. 31, 2011		Jun. 30, 2011
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	$ 18,846,322,000	[1]	$ 19,059,336,000	[1]
Accruing 30-89 Days Past Due	86,099,000	[1]	134,922,000	[1]
Accruing 90 Days or Greater Past Due	5,863,000	[1]	14,520,000	[1]
Total Accruing Past Due	91,962,000	[1]	149,442,000	[1]
Non-accrual	755,161,000	[1]	883,021,000	[1]
Total loans	19,693,445,000	[1],[2]	20,091,799,000	[1],[3]	20,513,597,000	[4]
Deferred fees and costs, net	13,300,000		12,000,000		8,800,000
Home Equity Lines [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	1,570,844,000	[1]	1,581,469,000	[1]
Accruing 30-89 Days Past Due	8,787,000	[1]	12,893,000	[1]
Accruing 90 Days or Greater Past Due	97,000	[1]	664,000	[1]
Total Accruing Past Due	8,884,000	[1]	13,557,000	[1]
Non-accrual	24,177,000	[1]	24,559,000	[1]
Total loans	1,603,905,000	[1]	1,619,585,000	[1]
Consumer Mortgages [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	1,313,575,000	[1]	1,326,411,000	[1]
Accruing 30-89 Days Past Due	16,908,000	[1]	23,213,000	[1]
Accruing 90 Days or Greater Past Due	1,649,000	[1]	5,130,000	[1]
Total Accruing Past Due	18,557,000	[1]	28,343,000	[1]
Non-accrual	51,783,000	[1]	56,995,000	[1]
Total loans	1,383,915,000	[1]	1,411,749,000	[1]
Credit Cards [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	258,289,000	[1]	267,511,000	[1]
Accruing 30-89 Days Past Due	2,288,000	[1]	3,113,000	[1]
Accruing 90 Days or Greater Past Due	1,825,000	[1]	2,474,000	[1]
Total Accruing Past Due	4,113,000	[1]	5,587,000	[1]
Non-accrual	0	[1]	0	[1]
Total loans	262,402,000	[1]	273,098,000	[1]
Other Retail Loans [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	661,771,000	[1]	562,706,000	[1]
Accruing 30-89 Days Past Due	4,958,000	[1]	6,232,000	[1]
Accruing 90 Days or Greater Past Due	147,000	[1]	171,000	[1]
Total Accruing Past Due	5,105,000	[1]	6,403,000	[1]
Non-accrual	7,437,000	[1]	6,366,000	[1]
Total loans	674,313,000	[1]	575,475,000	[1]
Investment Properties [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	4,320,314,000	[1]	4,450,627,000	[1]
Accruing 30-89 Days Past Due	8,990,000	[1]	10,866,000	[1]
Accruing 90 Days or Greater Past Due	98,000	[1]	54,000	[1]
Total Accruing Past Due	9,088,000	[1]	10,920,000	[1]
Non-accrual	87,208,000	[1]	95,766,000	[1]
Total loans	4,416,610,000	[1]	4,557,313,000	[1]
1-4 Family Properties [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	1,319,628,000	[1]	1,396,778,000	[1]
Accruing 30-89 Days Past Due	11,174,000	[1]	23,480,000	[1]
Accruing 90 Days or Greater Past Due	324,000	[1]	642,000	[1]
Total Accruing Past Due	11,498,000	[1]	24,122,000	[1]
Non-accrual	152,698,000	[1]	197,584,000	[1]
Total loans	1,483,824,000	[1]	1,618,484,000	[1]
Land Acquisition [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	766,057,000	[1]	855,021,000	[1]
Accruing 30-89 Days Past Due	4,149,000	[1]	5,299,000	[1]
Accruing 90 Days or Greater Past Due	116,000	[1]	350,000	[1]
Total Accruing Past Due	4,265,000	[1]	5,649,000	[1]
Non-accrual	213,521,000	[1]	234,151,000	[1]
Total loans	983,843,000	[1]	1,094,821,000	[1]
Commercial Real Estate [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	6,405,999,000	[1]	6,702,426,000	[1]
Accruing 30-89 Days Past Due	24,313,000	[1]	39,645,000	[1]
Accruing 90 Days or Greater Past Due	538,000	[1]	1,046,000	[1]
Total Accruing Past Due	24,851,000	[1]	40,691,000	[1]
Non-accrual	453,427,000	[1]	527,501,000	[1]
Total loans	6,884,277,000	[1]	7,270,618,000	[1]
Commercial and Industrial [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	8,635,844,000	[1]	8,618,813,000	[1]
Accruing 30-89 Days Past Due	28,845,000	[1]	49,826,000	[1]
Accruing 90 Days or Greater Past Due	1,607,000	[1]	5,035,000	[1]
Total Accruing Past Due	30,452,000	[1]	54,861,000	[1]
Non-accrual	218,337,000	[1]	267,600,000	[1]
Total loans	8,884,633,000	[1]	8,941,274,000	[1]
Retail [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Current	3,804,479,000	[1]	3,738,097,000	[1]
Accruing 30-89 Days Past Due	32,941,000	[1]	45,451,000	[1]
Accruing 90 Days or Greater Past Due	3,718,000	[1]	8,439,000	[1]
Total Accruing Past Due	36,659,000	[1]	53,890,000	[1]
Non-accrual	83,397,000	[1]	87,920,000	[1]
Total loans	$ 3,924,535,000	[1]	$ 3,879,907,000	[1]

[1] Loan balances in each category expressed as a component of total loans, excluding deferred fees and costs.

[2] Total excludes $13.3 million in net deferred fees and costs

[3] Total excludes $12.0 million in net deferred fees and costs

[4] Total excludes $8.8 million in net deferred fees and costs