Loans, Allowance for Loan Losses, and Credit Quality Impaired Loans Recorded Investment, Unpaid Principal Balance, Related Allowance, Average Recorded Investment, and Interest Income Recognized (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	$ 309,413	$ 373,955
Unpaid Principal Balance	361,694	455,097
Related Allowance	51,875	69,291
Average Recorded Investment	328,022	399,793
Interest Income Recognized	10,137	11,726
Loans With Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	250,263	301,669
Unpaid Principal Balance	283,066	351,382
Related Allowance	51,875	69,291
Average Recorded Investment	264,784	318,019
Interest Income Recognized	9,186	10,903
Loans With No Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	59,150	72,286
Unpaid Principal Balance	78,628	103,715
Related Allowance	0	0
Average Recorded Investment	63,238	81,774
Interest Income Recognized	951	823
Commercial And Industrial Financing Receivable [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	70,236	67,322
Unpaid Principal Balance	84,999	81,860
Related Allowance	11,917	13,741
Average Recorded Investment	75,291	67,391
Interest Income Recognized	2,047	2,416
Commercial And Industrial Financing Receivable [Member] | Loans With Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	57,857	57,985
Unpaid Principal Balance	65,443	65,521
Related Allowance	11,917	13,741
Average Recorded Investment	61,000	56,508
Interest Income Recognized	1,741	2,187
Commercial And Industrial Financing Receivable [Member] | Loans With No Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	12,379	9,337
Unpaid Principal Balance	19,556	16,339
Related Allowance	0	0
Average Recorded Investment	14,291	10,883
Interest Income Recognized	306	229
Commercial Real Estate Owner Occupied Portfolio [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	42,673	38,106
Unpaid Principal Balance	47,903	44,282
Related Allowance	2,955	3,811
Average Recorded Investment	45,151	40,956
Interest Income Recognized	1,310	1,111
Commercial Real Estate Owner Occupied Portfolio [Member] | Loans With Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	22,651	24,600
Unpaid Principal Balance	25,072	27,700
Related Allowance	2,955	3,811
Average Recorded Investment	24,549	26,531
Interest Income Recognized	995	1,043
Commercial Real Estate Owner Occupied Portfolio [Member] | Loans With No Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	20,022	13,506
Unpaid Principal Balance	22,831	16,582
Related Allowance	0	0
Average Recorded Investment	20,602	14,425
Interest Income Recognized	315	68
Finance Leases Financing Receivable [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	69	3,031
Unpaid Principal Balance	69	3,031
Related Allowance	29	0
Average Recorded Investment	76	4,016
Interest Income Recognized	0	0
Finance Leases Financing Receivable [Member] | Loans With Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	69	7
Unpaid Principal Balance	69	7
Related Allowance	29	0
Average Recorded Investment	76	120
Interest Income Recognized	0	0
Finance Leases Financing Receivable [Member] | Loans With No Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	0	3,024
Unpaid Principal Balance	0	3,024
Related Allowance	0	0
Average Recorded Investment	0	3,896
Interest Income Recognized	0	0
Commercial And Business Lending [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	112,978	108,459
Unpaid Principal Balance	132,971	129,173
Related Allowance	14,901	17,552
Average Recorded Investment	120,518	112,363
Interest Income Recognized	3,357	3,527
Commercial And Business Lending [Member] | Loans With Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	80,577	82,592
Unpaid Principal Balance	90,584	93,228
Related Allowance	14,901	17,552
Average Recorded Investment	85,625	83,159
Interest Income Recognized	2,736	3,230
Commercial And Business Lending [Member] | Loans With No Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	32,401	25,867
Unpaid Principal Balance	42,387	35,945
Related Allowance	0	0
Average Recorded Investment	34,893	29,204
Interest Income Recognized	621	297
Commercial Real Estate Investor Portfolio Segment [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	82,542	100,347
Unpaid Principal Balance	93,677	125,112
Related Allowance	7,895	9,687
Average Recorded Investment	88,130	106,132
Interest Income Recognized	2,865	3,064
Commercial Real Estate Investor Portfolio Segment [Member] | Loans With Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	64,647	80,766
Unpaid Principal Balance	68,228	96,581
Related Allowance	7,895	9,687
Average Recorded Investment	68,776	85,642
Interest Income Recognized	2,735	2,891
Commercial Real Estate Investor Portfolio Segment [Member] | Loans With No Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	17,895	19,581
Unpaid Principal Balance	25,449	28,531
Related Allowance	0	0
Average Recorded Investment	19,354	20,490
Interest Income Recognized	130	173
Commercial Real Estate Construction Financing Receivable [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	10,260	31,832
Unpaid Principal Balance	14,388	47,035
Related Allowance	2,416	3,411
Average Recorded Investment	11,372	37,472
Interest Income Recognized	249	546
Commercial Real Estate Construction Financing Receivable [Member] | Loans With Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	8,815	16,299
Unpaid Principal Balance	12,535	22,311
Related Allowance	2,416	3,411
Average Recorded Investment	9,796	19,122
Interest Income Recognized	236	437
Commercial Real Estate Construction Financing Receivable [Member] | Loans With No Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	1,445	15,533
Unpaid Principal Balance	1,853	24,724
Related Allowance	0	0
Average Recorded Investment	1,576	18,350
Interest Income Recognized	13	109
Commercial Real Estate Lending [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	92,802	132,179
Unpaid Principal Balance	108,065	172,147
Related Allowance	10,311	13,098
Average Recorded Investment	99,502	143,604
Interest Income Recognized	3,114	3,610
Commercial Real Estate Lending [Member] | Loans With Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	73,462	97,065
Unpaid Principal Balance	80,763	118,892
Related Allowance	10,311	13,098
Average Recorded Investment	78,572	104,764
Interest Income Recognized	2,971	3,328
Commercial Real Estate Lending [Member] | Loans With No Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	19,340	35,114
Unpaid Principal Balance	27,302	53,255
Related Allowance	0	0
Average Recorded Investment	20,930	38,840
Interest Income Recognized	143	282
Commercial Financing Receivable [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	205,780	240,638
Unpaid Principal Balance	241,036	301,320
Related Allowance	25,212	30,650
Average Recorded Investment	220,020	255,967
Interest Income Recognized	6,471	7,137
Commercial Financing Receivable [Member] | Loans With Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	154,039	179,657
Unpaid Principal Balance	171,347	212,120
Related Allowance	25,212	30,650
Average Recorded Investment	164,197	187,923
Interest Income Recognized	5,707	6,558
Commercial Financing Receivable [Member] | Loans With No Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	51,741	60,981
Unpaid Principal Balance	69,689	89,200
Related Allowance	0	0
Average Recorded Investment	55,823	68,044
Interest Income Recognized	764	579
Home Equity [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	34,800	49,183
Unpaid Principal Balance	40,436	56,725
Related Allowance	13,989	24,580
Average Recorded Investment	36,717	52,498
Interest Income Recognized	1,520	1,998
Home Equity [Member] | Loans With Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	34,707	47,113
Unpaid Principal Balance	40,344	54,456
Related Allowance	13,989	24,580
Average Recorded Investment	36,623	50,334
Interest Income Recognized	1,518	1,962
Home Equity [Member] | Loans With No Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	93	2,070
Unpaid Principal Balance	92	2,269
Related Allowance	0	0
Average Recorded Investment	94	2,164
Interest Income Recognized	2	36
Installment [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	1,360	2,491
Unpaid Principal Balance	1,676	2,847
Related Allowance	487	1,155
Average Recorded Investment	1,753	2,773
Interest Income Recognized	100	172
Installment [Member] | Loans With Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	1,360	2,491
Unpaid Principal Balance	1,676	2,847
Related Allowance	487	1,155
Average Recorded Investment	1,753	2,773
Interest Income Recognized	100	172
Installment [Member] | Loans With No Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Residential, Prime, Financing Receivable [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	67,473	81,643
Unpaid Principal Balance	78,546	94,205
Related Allowance	12,187	12,906
Average Recorded Investment	69,532	88,555
Interest Income Recognized	2,046	2,419
Residential, Prime, Financing Receivable [Member] | Loans With Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	60,157	72,408
Unpaid Principal Balance	69,699	81,959
Related Allowance	12,187	12,906
Average Recorded Investment	62,211	76,989
Interest Income Recognized	1,861	2,211
Residential, Prime, Financing Receivable [Member] | Loans With No Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	7,316	9,235
Unpaid Principal Balance	8,847	12,246
Related Allowance	0	0
Average Recorded Investment	7,321	11,566
Interest Income Recognized	185	208
Consumer Loan [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	103,633	133,317
Unpaid Principal Balance	120,658	153,777
Related Allowance	26,663	38,641
Average Recorded Investment	108,002	143,826
Interest Income Recognized	3,666	4,589
Consumer Loan [Member] | Loans With Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	96,224	122,012
Unpaid Principal Balance	111,719	139,262
Related Allowance	26,663	38,641
Average Recorded Investment	100,587	130,096
Interest Income Recognized	3,479	4,345
Consumer Loan [Member] | Loans With No Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	7,409	11,305
Unpaid Principal Balance	8,939	14,515
Related Allowance	0	0
Average Recorded Investment	7,415	13,730
Interest Income Recognized	$ 187	$ 244