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	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	$ 288,741	$ 309,413
Unpaid Principal Balance	325,890	361,694
Related Allowance	53,751	51,875
YTD Average Recorded Investment	300,635	328,022
YTD Interest Income Recognized	7,285	10,137
Fair Value Mark	72.00%	71.00%
Loans With Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	239,621	250,263
Unpaid Principal Balance	259,887	283,066
Related Allowance	53,751	51,875
YTD Average Recorded Investment	245,572	264,784
YTD Interest Income Recognized	6,951	9,186
Loans With No Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	49,120	59,150
Unpaid Principal Balance	66,003	78,628
Related Allowance	0	0
YTD Average Recorded Investment	55,063	63,238
YTD Interest Income Recognized	334	951
Commercial And Industrial Financing Receivable [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	88,098	70,236
Unpaid Principal Balance	98,082	84,999
Related Allowance	17,596	11,917
YTD Average Recorded Investment	91,251	75,291
YTD Interest Income Recognized	2,594	2,047
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	74,410	57,857
Unpaid Principal Balance	76,852	65,443
Related Allowance	17,596	11,917
YTD Average Recorded Investment	74,470	61,000
YTD Interest Income Recognized	2,548	1,741
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	13,688	12,379
Unpaid Principal Balance	21,230	19,556
Related Allowance	0	0
YTD Average Recorded Investment	16,781	14,291
YTD Interest Income Recognized	46	306
Commercial Real Estate Owner Occupied Portfolio [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	35,914	42,673
Unpaid Principal Balance	40,845	47,903
Related Allowance	4,076	2,955
YTD Average Recorded Investment	38,187	45,151
YTD Interest Income Recognized	621	1,310
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	23,250	22,651
Unpaid Principal Balance	25,849	25,072
Related Allowance	4,076	2,955
YTD Average Recorded Investment	24,412	24,549
YTD Interest Income Recognized	585	995
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	12,664	20,022
Unpaid Principal Balance	14,996	22,831
Related Allowance	0	0
YTD Average Recorded Investment	13,775	20,602
YTD Interest Income Recognized	36	315
Finance Leases Financing Receivable [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	1,947	69
Unpaid Principal Balance	1,946	69
Related Allowance	739	29
YTD Average Recorded Investment	2,074	76
YTD 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	1,946	69
Unpaid Principal Balance	1,946	69
Related Allowance	739	29
YTD Average Recorded Investment	2,074	76
YTD 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	1	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
YTD Average Recorded Investment	0	0
YTD 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	125,959	112,978
Unpaid Principal Balance	140,873	132,971
Related Allowance	22,411	14,901
YTD Average Recorded Investment	131,512	120,518
YTD Interest Income Recognized	3,215	3,357
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	99,606	80,577
Unpaid Principal Balance	104,647	90,584
Related Allowance	22,411	14,901
YTD Average Recorded Investment	100,956	85,625
YTD Interest Income Recognized	3,133	2,736
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	26,353	32,401
Unpaid Principal Balance	36,226	42,387
Related Allowance	0	0
YTD Average Recorded Investment	30,556	34,893
YTD Interest Income Recognized	82	621
Commercial Real Estate Investor Portfolio Segment [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	49,546	82,542
Unpaid Principal Balance	60,005	93,677
Related Allowance	4,258	7,895
YTD Average Recorded Investment	52,844	88,130
YTD Interest Income Recognized	1,121	2,865
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	38,566	64,647
Unpaid Principal Balance	42,836	68,228
Related Allowance	4,258	7,895
YTD Average Recorded Investment	40,288	68,776
YTD Interest Income Recognized	988	2,735
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	10,980	17,895
Unpaid Principal Balance	17,169	25,449
Related Allowance	0	0
YTD Average Recorded Investment	12,556	19,354
YTD Interest Income Recognized	133	130
Commercial Real Estate Construction Financing Receivable [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	8,992	10,260
Unpaid Principal Balance	12,480	14,388
Related Allowance	2,161	2,416
YTD Average Recorded Investment	10,015	11,372
YTD Interest Income Recognized	158	249
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	5,778	8,815
Unpaid Principal Balance	8,576	12,535
Related Allowance	2,161	2,416
YTD Average Recorded Investment	6,702	9,796
YTD Interest Income Recognized	158	236
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	3,214	1,445
Unpaid Principal Balance	3,904	1,853
Related Allowance	0	0
YTD Average Recorded Investment	3,313	1,576
YTD Interest Income Recognized	0	13
Commercial Real Estate Lending [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	58,538	92,802
Unpaid Principal Balance	72,485	108,065
Related Allowance	6,419	10,311
YTD Average Recorded Investment	62,859	99,502
YTD Interest Income Recognized	1,279	3,114
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	44,344	73,462
Unpaid Principal Balance	51,412	80,763
Related Allowance	6,419	10,311
YTD Average Recorded Investment	46,990	78,572
YTD Interest Income Recognized	1,146	2,971
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	14,194	19,340
Unpaid Principal Balance	21,073	27,302
Related Allowance	0	0
YTD Average Recorded Investment	15,869	20,930
YTD Interest Income Recognized	133	143
Commercial Financing Receivable [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	184,497	205,780
Unpaid Principal Balance	213,358	241,036
Related Allowance	28,830	25,212
YTD Average Recorded Investment	194,371	220,020
YTD Interest Income Recognized	4,494	6,471
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	143,950	154,039
Unpaid Principal Balance	156,059	171,347
Related Allowance	28,830	25,212
YTD Average Recorded Investment	147,946	164,197
YTD Interest Income Recognized	4,279	5,707
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	40,547	51,741
Unpaid Principal Balance	57,299	69,689
Related Allowance	0	0
YTD Average Recorded Investment	46,425	55,823
YTD Interest Income Recognized	215	764
Home Equity [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	31,843	34,800
Unpaid Principal Balance	35,251	40,436
Related Allowance	12,491	13,989
YTD Average Recorded Investment	32,706	36,717
YTD Interest Income Recognized	1,120	1,520
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	30,996	34,707
Unpaid Principal Balance	34,392	40,344
Related Allowance	12,491	13,989
YTD Average Recorded Investment	31,842	36,623
YTD Interest Income Recognized	1,105	1,518
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	847	93
Unpaid Principal Balance	859	92
Related Allowance	0	0
YTD Average Recorded Investment	864	94
YTD Interest Income Recognized	15	2
Installment and Credit Cards [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	1,759	1,360
Unpaid Principal Balance	1,979	1,676
Related Allowance	339	487
YTD Average Recorded Investment	1,864	1,753
YTD Interest Income Recognized	41	100
Installment and Credit Cards [Member] | Loans With Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	1,759	1,360
Unpaid Principal Balance	1,979	1,676
Related Allowance	339	487
YTD Average Recorded Investment	1,864	1,753
YTD Interest Income Recognized	41	100
Installment and Credit Cards [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
YTD Average Recorded Investment	0	0
YTD 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	70,642	67,473
Unpaid Principal Balance	75,302	78,546
Related Allowance	12,091	12,187
YTD Average Recorded Investment	71,694	69,532
YTD Interest Income Recognized	1,630	2,046
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	62,916	60,157
Unpaid Principal Balance	67,457	69,699
Related Allowance	12,091	12,187
YTD Average Recorded Investment	63,920	62,211
YTD Interest Income Recognized	1,526	1,861
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	7,726	7,316
Unpaid Principal Balance	7,845	8,847
Related Allowance	0	0
YTD Average Recorded Investment	7,774	7,321
YTD Interest Income Recognized	104	185
Consumer Loan [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	104,244	103,633
Unpaid Principal Balance	112,532	120,658
Related Allowance	24,921	26,663
YTD Average Recorded Investment	106,264	108,002
YTD Interest Income Recognized	2,791	3,666
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	95,671	96,224
Unpaid Principal Balance	103,828	111,719
Related Allowance	24,921	26,663
YTD Average Recorded Investment	97,626	100,587
YTD Interest Income Recognized	2,672	3,479
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	8,573	7,409
Unpaid Principal Balance	8,704	8,939
Related Allowance	0	0
YTD Average Recorded Investment	8,638	7,415
YTD Interest Income Recognized	$ 119	$ 187