Loans Part 5 (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010
Financing receivable, recorded investment, aging [Abstract]
Current	$ 10,364,210	$ 10,287,554
Past due 30 to 89 days	48,519	59,110
Past due 90 days or more	124,645	65,558
Nonaccrual	200,170	230,814
Total	10,737,544	10,643,036	10,882,717
Commercial Services Financing Receivable [Member] | Commercial Loan [Member]
Financing receivable, recorded investment, aging [Abstract]
Current	1,691,451	1,558,120
Past due 30 to 89 days	3,759	3,196
Past due 90 days or more	1,593	343
Nonaccrual	16,254	19,262
Total	1,713,057	1,580,921
Commercial Energy Financing Receivable [Member] | Commercial Loan [Member]
Financing receivable, recorded investment, aging [Abstract]
Current	1,682,344	1,707,466
Past due 30 to 89 days	153	507
Past due 90 days or more		2,971
Nonaccrual	345	465
Total	1,682,842	1,711,409
Commercial Wholesale Retail Financing Receivables [Member] | Commercial Loan [Member]
Financing receivable, recorded investment, aging [Abstract]
Current	1,041,864	1,001,422
Past due 30 to 89 days	697	315
Past due 90 days or more	487	23
Nonaccrual	25,138	8,486
Total	1,068,186	1,010,246
Commercial Healthcare Financing Receivable [Member] | Commercial Loan [Member]
Financing receivable, recorded investment, aging [Abstract]
Current	863,169	805,124
Past due 30 to 89 days	177	75
Past due 90 days or more		892
Nonaccrual	5,962	3,534
Total	869,308	809,625
Commercial Manufacturing Financing Receivable [Member] | Commercial Loan [Member]
Financing receivable, recorded investment, aging [Abstract]
Current	362,785	321,102
Past due 30 to 89 days		168
Past due 90 days or more		1,805
Nonaccrual	4,366	2,116
Total	367,151	325,191
Commercial Other Commercial and Industrial [Member] | Commercial Loan [Member]
Financing receivable, recorded investment, aging [Abstract]
Current	280,729	287,357
Past due 30 to 89 days	192	111
Past due 90 days or more	57	274
Nonaccrual	1,300	4,579
Total	282,278	292,321
Commercial Integrated Food Services Financing Receivables [Member] | Commercial Loan [Member]
Financing receivable, recorded investment, aging [Abstract]
Current	195,774	204,199
Past due 30 to 89 days		71
Nonaccrual		13
Total	195,774	204,283
Commercial Loan [Member]
Financing receivable, recorded investment, aging [Abstract]
Current	6,118,116	5,884,790
Past due 30 to 89 days	4,978	4,443
Past due 90 days or more	2,137	6,308
Nonaccrual	53,365	38,455
Total	6,178,596	5,933,996
Commercial Real Estate Office Financing Receivables [Member] | Commercial Real Estate [Member]
Financing receivable, recorded investment, aging [Abstract]
Current	468,712	437,496
Past due 30 to 89 days	2,320	300
Nonaccrual	11,473	19,654
Total	482,505	457,450
Commercial Real Estate Retail Financing Receivables [Member] | Commercial Real Estate [Member]
Financing receivable, recorded investment, aging [Abstract]
Current	430,941	394,445
Past due 30 to 89 days	2,911	6,117
Nonaccrual	4,642	4,978
Total	438,494	405,540
Commercial Real Estate Other Real Estate Loans Financing Receivables [Member] | Commercial Real Estate [Member]
Financing receivable, recorded investment, aging [Abstract]
Current	381,961	395,320
Past due 30 to 89 days	2,393	4,301
Past due 90 days or more	175	197
Nonaccrual	13,266	15,343
Total	397,795	415,161
Commercial Real Estate Construction Financing Receivable [Member] | Commercial Real Estate [Member]
Financing receivable, recorded investment, aging [Abstract]
Current	288,494	344,016
Past due 30 to 89 days	2,333	3,170
Past due 90 days or more		1,099
Nonaccrual	76,265	99,579
Total	367,092	447,864
Commercial Real Estate Multifamily Financing Receivables [Member] | Commercial Real Estate [Member]
Financing receivable, recorded investment, aging [Abstract]
Current	330,945	362,517
Nonaccrual	4,717	6,725
Total	335,662	369,242
Commercial Real Estate Industrial [Member] | Commercial Real Estate [Member]
Financing receivable, recorded investment, aging [Abstract]
Current	161,783	177,660
Past due 30 to 89 days	384	346
Nonaccrual		4,087
Total	162,167	182,093
Commercial Real Estate [Member]
Financing receivable, recorded investment, aging [Abstract]
Current	2,062,836	2,111,454
Past due 30 to 89 days	10,341	14,234
Past due 90 days or more	175	1,296
Nonaccrual	110,363	150,366
Total	2,183,715	2,277,350
Residential Mortgage [Member]
Financing receivable, recorded investment, aging [Abstract]
Current	1,689,079	1,705,106
Past due 30 to 89 days	24,913	28,124
Past due 90 days or more	122,312	57,592
Nonaccrual	31,693	37,426
Total	1,867,997	1,828,248
Residential Mortgage [Member] | Residential Mortgage Permanent Mortgage Financing Receivables [Member]
Financing receivable, recorded investment, aging [Abstract]
Current	1,104,450	1,148,271
Past due 30 to 89 days	18,735	22,177
Nonaccrual	27,991	32,111
Total	1,151,176	1,202,559
Residential Mortgage [Member] | Residential Mortgage Permanent Mortgage Us Government Agency Guaranteed Financing Receivables [Member]
Financing receivable, recorded investment, aging [Abstract]
Current	8,426	10,451
Past due 30 to 89 days	3,728	4,342
Past due 90 days or more	122,304	57,592
Total	134,458	72,385
Residential Mortgage [Member] | Home Equity [Member]
Financing receivable, recorded investment, aging [Abstract]
Current	576,203	546,384
Past due 30 to 89 days	2,450	1,605
Past due 90 days or more	8
Nonaccrual	3,702	5,315
Total	582,363	553,304
Consumer Loan [Member]
Financing receivable, recorded investment, aging [Abstract]
Current	494,179	586,204
Past due 30 to 89 days	8,287	12,309
Past due 90 days or more	21	362
Nonaccrual	4,749	4,567
Total	507,236	603,442
Consumer Loan [Member] | Consumer Loans Auto Financing Receivable [Member]
Financing receivable, recorded investment, aging [Abstract]
Current	152,496	225,601
Past due 30 to 89 days	7,256	11,382
Past due 90 days or more	19	67
Nonaccrual	2,729	2,526
Total	162,500	239,576
Consumer Loan [Member] | Consumer Other Financing Receivable [Member]
Financing receivable, recorded investment, aging [Abstract]
Current	341,683	360,603
Past due 30 to 89 days	1,031	927
Past due 90 days or more	2	295
Nonaccrual	2,020	2,041
Total	$ 344,736	$ 363,866