Loans Part 3 (Details) (USD $) In Thousands	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Jun. 30, 2010
Recorded Investment [Abstract]
Financing Receivable Internally Graded	$ 8,914,658		$ 8,889,752
Financing Receivable Non - Graded	1,822,886		1,753,284
Total	10,737,544		10,643,036	10,882,717
Related Allowance [Abstract]
Allowance For Financing Receivable Internally Graded	212,930		211,205
Allowance For Financing Receivable Non- Graded	46,556		55,030
Allowance For Financing Receivable Total	286,611	289,549	292,971	299,489
Commercial Services Financing Receivable [Member] | Commercial Loan [Member]
Recorded Investment [Abstract]
Total	1,713,057		1,580,921
Commercial Services Financing Receivable [Member] | Commercial Loan [Member] | Performing Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	1,663,313		1,531,239
Commercial Services Financing Receivable [Member] | Commercial Loan [Member] | Potential Problem Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	33,490		30,420
Commercial Services Financing Receivable [Member] | Commercial Loan [Member] | Nonaccrual Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	16,254		19,262
Commercial Energy Financing Receivable [Member] | Commercial Loan [Member]
Recorded Investment [Abstract]
Total	1,682,842		1,711,409
Commercial Energy Financing Receivable [Member] | Commercial Loan [Member] | Performing Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	1,677,809		1,704,401
Commercial Energy Financing Receivable [Member] | Commercial Loan [Member] | Potential Problem Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	4,688		6,543
Commercial Energy Financing Receivable [Member] | Commercial Loan [Member] | Nonaccrual Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	345		465
Commercial Wholesale Retail Financing Receivables [Member] | Commercial Loan [Member]
Recorded Investment [Abstract]
Total	1,068,186		1,010,246
Commercial Wholesale Retail Financing Receivables [Member] | Commercial Loan [Member] | Performing Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	1,002,113		956,397
Commercial Wholesale Retail Financing Receivables [Member] | Commercial Loan [Member] | Potential Problem Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	40,935		45,363
Commercial Wholesale Retail Financing Receivables [Member] | Commercial Loan [Member] | Nonaccrual Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded			8,486
Commercial Healthcare Financing Receivable [Member] | Commercial Loan [Member]
Recorded Investment [Abstract]
Total	869,308		809,625
Commercial Healthcare Financing Receivable [Member] | Commercial Loan [Member] | Performing Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	860,354		801,525
Commercial Healthcare Financing Receivable [Member] | Commercial Loan [Member] | Potential Problem Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	2,992		4,566
Commercial Healthcare Financing Receivable [Member] | Commercial Loan [Member] | Nonaccrual Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	5,962		3,534
Commercial Manufacturing Financing Receivable [Member] | Commercial Loan [Member]
Recorded Investment [Abstract]
Total	367,151		325,191
Commercial Manufacturing Financing Receivable [Member] | Commercial Loan [Member] | Performing Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	359,958		319,075
Commercial Manufacturing Financing Receivable [Member] | Commercial Loan [Member] | Potential Problem Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	2,827		4,000
Commercial Manufacturing Financing Receivable [Member] | Commercial Loan [Member] | Nonaccrual Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	4,366		2,116
Commercial Other Commercial and Industrial [Member] | Commercial Loan [Member]
Recorded Investment [Abstract]
Total	282,278		292,321
Commercial Other Commercial and Industrial [Member] | Commercial Loan [Member] | Performing Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	258,910		267,949
Financing Receivable Non - Graded	18,658		19,685
Commercial Other Commercial and Industrial [Member] | Commercial Loan [Member] | Potential Problem Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	3,410		108
Commercial Other Commercial and Industrial [Member] | Commercial Loan [Member] | Nonaccrual Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	1,097		4,446
Financing Receivable Non - Graded	203		133
Commercial Integrated Food Services Financing Receivables [Member] | Commercial Loan [Member]
Recorded Investment [Abstract]
Total	195,774		204,283
Commercial Integrated Food Services Financing Receivables [Member] | Commercial Loan [Member] | Performing Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	194,514		202,885
Commercial Integrated Food Services Financing Receivables [Member] | Commercial Loan [Member] | Potential Problem Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	1,260		1,385
Commercial Integrated Food Services Financing Receivables [Member] | Commercial Loan [Member] | Nonaccrual Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded			13
Commercial Loan [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	6,159,735		5,914,178
Financing Receivable Non - Graded	18,861		19,818
Total	6,178,596		5,933,996
Related Allowance [Abstract]
Allowance For Financing Receivable Internally Graded	111,392		102,259
Allowance For Financing Receivable Non- Graded	2,179		2,372
Allowance For Financing Receivable Total	113,571		104,631
Commercial Loan [Member] | Performing Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	6,016,971		5,783,471
Financing Receivable Non - Graded	18,658		19,685
Commercial Loan [Member] | Potential Problem Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	89,602		92,385
Financing Receivable Non - Graded			133
Commercial Loan [Member] | Nonaccrual Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	53,162		38,322
Financing Receivable Non - Graded	203
Commercial Wholesale Retail Financing Receivables [Member] | Commercial Real Estate [Member] | Nonaccrual Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	25,138
Commercial Real Estate Office Financing Receivables [Member] | Commercial Real Estate [Member]
Recorded Investment [Abstract]
Total	482,505		457,450
Commercial Real Estate Office Financing Receivables [Member] | Commercial Real Estate [Member] | Performing Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	456,281		420,899
Commercial Real Estate Office Financing Receivables [Member] | Commercial Real Estate [Member] | Potential Problem Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	14,751		16,897
Commercial Real Estate Office Financing Receivables [Member] | Commercial Real Estate [Member] | Nonaccrual Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	11,473		19,654
Commercial Real Estate Retail Financing Receivables [Member] | Commercial Real Estate [Member]
Recorded Investment [Abstract]
Total	438,494		405,540
Commercial Real Estate Retail Financing Receivables [Member] | Commercial Real Estate [Member] | Performing Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	426,839		395,094
Commercial Real Estate Retail Financing Receivables [Member] | Commercial Real Estate [Member] | Potential Problem Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	7,013		5,468
Commercial Real Estate Retail Financing Receivables [Member] | Commercial Real Estate [Member] | Nonaccrual Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	4,642		4,978
Commercial Real Estate Other Real Estate Loans Financing Receivables [Member] | Commercial Real Estate [Member]
Recorded Investment [Abstract]
Total	397,795		415,161
Commercial Real Estate Other Real Estate Loans Financing Receivables [Member] | Commercial Real Estate [Member] | Performing Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	363,491		390,969
Commercial Real Estate Other Real Estate Loans Financing Receivables [Member] | Commercial Real Estate [Member] | Potential Problem Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	21,038		8,849
Commercial Real Estate Other Real Estate Loans Financing Receivables [Member] | Commercial Real Estate [Member] | Nonaccrual Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	13,266		15,343
Commercial Real Estate Construction Financing Receivable [Member] | Commercial Real Estate [Member]
Recorded Investment [Abstract]
Total	367,092		447,864
Commercial Real Estate Construction Financing Receivable [Member] | Commercial Real Estate [Member] | Performing Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	275,077		326,769
Commercial Real Estate Construction Financing Receivable [Member] | Commercial Real Estate [Member] | Potential Problem Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	15,750		21,516
Commercial Real Estate Construction Financing Receivable [Member] | Commercial Real Estate [Member] | Nonaccrual Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	76,265		99,579
Commercial Real Estate Multifamily Financing Receivables [Member] | Commercial Real Estate [Member]
Recorded Investment [Abstract]
Total	335,662		369,242
Commercial Real Estate Multifamily Financing Receivables [Member] | Commercial Real Estate [Member] | Performing Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	325,085		355,733
Commercial Real Estate Multifamily Financing Receivables [Member] | Commercial Real Estate [Member] | Potential Problem Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	5,860		6,784
Commercial Real Estate Multifamily Financing Receivables [Member] | Commercial Real Estate [Member] | Nonaccrual Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	4,717		6,725
Commercial Real Estate Industrial [Member] | Commercial Real Estate [Member]
Recorded Investment [Abstract]
Total	162,167		182,093
Commercial Real Estate Industrial [Member] | Commercial Real Estate [Member] | Performing Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	161,879		177,712
Commercial Real Estate Industrial [Member] | Commercial Real Estate [Member] | Potential Problem Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	288		294
Commercial Real Estate Industrial [Member] | Commercial Real Estate [Member] | Nonaccrual Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded			4,087
Commercial Real Estate [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	2,183,715		2,277,350
Total	2,183,715		2,277,350
Related Allowance [Abstract]
Allowance For Financing Receivable Internally Graded	91,750		98,709
Allowance For Financing Receivable Total	91,750		98,709
Commercial Real Estate [Member] | Performing Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	2,008,652		2,067,176
Commercial Real Estate [Member] | Potential Problem Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	64,700		59,808
Commercial Real Estate [Member] | Nonaccrual Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	110,363		150,366
Residential Mortgage [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	350,986		451,874
Financing Receivable Non - Graded	1,517,011		1,376,374
Total	1,867,997		1,828,248
Related Allowance [Abstract]
Allowance For Financing Receivable Internally Graded	7,911		8,356
Allowance For Financing Receivable Non- Graded	37,332		41,925
Allowance For Financing Receivable Total	45,243		50,281
Residential Mortgage [Member] | Residential Mortgage Permanent Mortgage Financing Receivables [Member]
Recorded Investment [Abstract]
Total	1,151,176		1,202,559
Residential Mortgage [Member] | Residential Mortgage Permanent Mortgage Financing Receivables [Member] | Performing Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	326,349		420,407
Financing Receivable Non - Graded	783,084		730,638
Residential Mortgage [Member] | Residential Mortgage Permanent Mortgage Financing Receivables [Member] | Potential Problem Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	13,752		19,403
Residential Mortgage [Member] | Residential Mortgage Permanent Mortgage Financing Receivables [Member] | Nonaccrual Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	10,885		12,064
Financing Receivable Non - Graded	17,106		20,047
Residential Mortgage [Member] | Residential Mortgage Permanent Mortgage Us Government Agency Guaranteed Financing Receivables [Member]
Recorded Investment [Abstract]
Total	134,458		72,385
Residential Mortgage [Member] | Residential Mortgage Permanent Mortgage Us Government Agency Guaranteed Financing Receivables [Member] | Performing Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Non - Graded	134,458		72,385
Residential Mortgage [Member] | Home Equity [Member]
Recorded Investment [Abstract]
Total	582,363		553,304
Residential Mortgage [Member] | Home Equity [Member] | Performing Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Non - Graded	578,661		547,989
Residential Mortgage [Member] | Home Equity [Member] | Nonaccrual Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Non - Graded	3,702		5,315
Residential Mortgage [Member] | Performing Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	326,349		420,407
Financing Receivable Non - Graded	1,496,203		1,351,012
Residential Mortgage [Member] | Potential Problem Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	13,752		19,403
Residential Mortgage [Member] | Nonaccrual Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	10,885		12,064
Financing Receivable Non - Graded	20,808		25,362
Consumer Loan [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	220,222		246,350
Financing Receivable Non - Graded	287,014		357,092
Total	507,236		603,442
Related Allowance [Abstract]
Allowance For Financing Receivable Internally Graded	1,877		1,881
Allowance For Financing Receivable Non- Graded	7,045		10,733
Allowance For Financing Receivable Total	8,922		12,614
Consumer Loan [Member] | Consumer Loans Auto Financing Receivable [Member]
Recorded Investment [Abstract]
Total	162,500		239,576
Consumer Loan [Member] | Consumer Loans Auto Financing Receivable [Member] | Performing Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Non - Graded	159,771		237,050
Consumer Loan [Member] | Consumer Loans Auto Financing Receivable [Member] | Nonaccrual Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Non - Graded	2,729		2,526
Consumer Loan [Member] | Consumer Other Financing Receivable [Member]
Recorded Investment [Abstract]
Total	344,736		363,866
Consumer Loan [Member] | Consumer Other Financing Receivable [Member] | Performing Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	215,056		240,243
Financing Receivable Non - Graded	124,415		117,226
Consumer Loan [Member] | Consumer Other Financing Receivable [Member] | Potential Problem Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	3,245		4,356
Financing Receivable Non - Graded	3,245
Consumer Loan [Member] | Consumer Other Financing Receivable [Member] | Nonaccrual Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	1,921		1,751
Financing Receivable Non - Graded	99		290
Consumer Loan [Member] | Performing Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	215,056		240,243
Financing Receivable Non - Graded	284,186		354,276
Consumer Loan [Member] | Potential Problem Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	3,245		4,356
Consumer Loan [Member] | Nonaccrual Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	1,921		1,751
Financing Receivable Non - Graded	2,828		2,816
Allocated Class of Receivables [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	8,914,658		8,889,752
Financing Receivable Non - Graded	1,822,886		1,753,284
Total	10,737,544		10,643,036
Related Allowance [Abstract]
Allowance For Financing Receivable Internally Graded	212,930		211,205
Allowance For Financing Receivable Non- Graded	46,556		55,030
Allowance For Financing Receivable Total	259,486		266,235
Unallocated Financing Receivables [Member]
Related Allowance [Abstract]
Allowance For Financing Receivable Total	27,125		26,736
Performing Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	8,567,028		8,511,297
Financing Receivable Non - Graded	1,799,047		1,724,973
Potential Problem Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	171,299		175,952
Nonaccrual Financing Receivable [Member]
Recorded Investment [Abstract]
Financing Receivable Internally Graded	176,331		202,503
Financing Receivable Non - Graded	$ 23,839		$ 28,311