Loans, Impaired Loans Recorded Investment, Unpaid Principal Balance, Related Allowance, Average Recorded Investment, and Interest Income Recognized (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	$ 265,621	$ 275,629
Unpaid Principal Balance	284,433	310,811
Related Allowance	33,669	50,431
Average Recorded Investment	273,011	290,370
Interest Income Recognized	8,716	9,384
Interest income recognized on accruing restructured loans	$ 4,000	$ 5,000
Net Recorded Investment of the Impaired Loans	82.00%	72.00%
Loans With Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	$ 186,275	$ 232,166
Unpaid Principal Balance	197,109	253,186
Related Allowance	33,669	50,431
Average Recorded Investment	178,871	242,219
Interest Income Recognized	6,798	8,797
Loans With No Related Allowance [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	79,346	43,463
Unpaid Principal Balance	87,324	57,625
Related Allowance	0	0
Average Recorded Investment	94,140	48,151
Interest Income Recognized	1,918	587
Commercial And Industrial Financing Receivable [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	121,234	83,555
Unpaid Principal Balance	130,034	93,048
Related Allowance	8,162	16,467
Average Recorded Investment	124,499	88,855
Interest Income Recognized	2,512	3,221
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	57,785	76,433
Unpaid Principal Balance	59,409	80,414
Related Allowance	8,162	16,467
Average Recorded Investment	46,833	80,004
Interest Income Recognized	855	3,139
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	63,449	7,122
Unpaid Principal Balance	70,625	12,634
Related Allowance	0	0
Average Recorded Investment	77,666	8,851
Interest Income Recognized	1,657	82
Commercial Real Estate Owner Occupied Portfolio [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	15,926	36,279
Unpaid Principal Balance	16,452	40,826
Related Allowance	448	3,221
Average Recorded Investment	16,621	38,848
Interest Income Recognized	427	900
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	9,705	19,839
Unpaid Principal Balance	9,804	21,807
Related Allowance	448	3,221
Average Recorded Investment	10,087	20,878
Interest Income Recognized	412	681
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	6,221	16,440
Unpaid Principal Balance	6,648	19,019
Related Allowance	0	0
Average Recorded Investment	6,534	17,970
Interest Income Recognized	15	219
Finance Leases Financing Receivable [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	1,634	1,801
Unpaid Principal Balance	1,634	1,801
Related Allowance	0	574
Average Recorded Investment	1,907	2,009
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	0	1,801
Unpaid Principal Balance	0	1,801
Related Allowance	0	574
Average Recorded Investment	0	2,009
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	1,634
Unpaid Principal Balance	1,634
Related Allowance	0
Average Recorded Investment	1,907
Interest Income Recognized	0
Commercial And Business Lending [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	138,794	121,635
Unpaid Principal Balance	148,120	135,675
Related Allowance	8,610	20,262
Average Recorded Investment	143,027	129,712
Interest Income Recognized	2,939	4,121
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	67,490	98,073
Unpaid Principal Balance	69,213	104,022
Related Allowance	8,610	20,262
Average Recorded Investment	56,920	102,891
Interest Income Recognized	1,267	3,820
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	71,304	23,562
Unpaid Principal Balance	78,907	31,653
Related Allowance	0	0
Average Recorded Investment	86,107	26,821
Interest Income Recognized	1,672	301
Commercial Real Estate Investor Portfolio Segment [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	30,558	45,812
Unpaid Principal Balance	32,284	54,905
Related Allowance	1,831	3,587
Average Recorded Investment	31,041	48,671
Interest Income Recognized	2,004	1,383
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	27,822	36,841
Unpaid Principal Balance	29,444	40,869
Related Allowance	1,831	3,587
Average Recorded Investment	28,278	38,657
Interest Income Recognized	1,914	1,250
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	2,736	8,971
Unpaid Principal Balance	2,840	14,036
Related Allowance	0	0
Average Recorded Investment	2,763	10,014
Interest Income Recognized	90	133
Commercial Real Estate Construction Financing Receivable [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	1,450	6,126
Unpaid Principal Balance	2,154	9,725
Related Allowance	453	1,095
Average Recorded Investment	1,667	7,059
Interest Income Recognized	66	105
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	1,450	3,043
Unpaid Principal Balance	2,154	5,910
Related Allowance	453	1,095
Average Recorded Investment	1,667	3,818
Interest Income Recognized	66	105
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	0	3,083
Unpaid Principal Balance	0	3,815
Related Allowance	0	0
Average Recorded Investment	0	3,241
Interest Income Recognized	0	0
Commercial Real Estate Lending [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	32,008	51,938
Unpaid Principal Balance	34,438	64,630
Related Allowance	2,284	4,682
Average Recorded Investment	32,708	55,730
Interest Income Recognized	2,070	1,488
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	29,272	39,884
Unpaid Principal Balance	31,598	46,779
Related Allowance	2,284	4,682
Average Recorded Investment	29,945	42,475
Interest Income Recognized	1,980	1,355
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	2,736	12,054
Unpaid Principal Balance	2,840	17,851
Related Allowance	0	0
Average Recorded Investment	2,763	13,255
Interest Income Recognized	90	133
Commercial Financing Receivable [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	170,802	173,573
Unpaid Principal Balance	182,558	200,305
Related Allowance	10,894	24,944
Average Recorded Investment	175,735	185,442
Interest Income Recognized	5,009	5,609
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	96,762	137,957
Unpaid Principal Balance	100,811	150,801
Related Allowance	10,894	24,944
Average Recorded Investment	86,865	145,366
Interest Income Recognized	3,247	5,175
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	74,040	35,616
Unpaid Principal Balance	81,747	49,504
Related Allowance	0	0
Average Recorded Investment	88,870	40,076
Interest Income Recognized	1,762	434
Home Equity [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	22,313	24,660
Unpaid Principal Balance	24,533	27,391
Related Allowance	10,118	11,382
Average Recorded Investment	23,168	25,938
Interest Income Recognized	1,177	1,275
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	21,769	23,874
Unpaid Principal Balance	23,989	26,585
Related Allowance	10,118	11,382
Average Recorded Investment	22,624	25,087
Interest Income Recognized	1,147	1,257
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	544	786
Unpaid Principal Balance	544	806
Related Allowance	0	0
Average Recorded Investment	544	851
Interest Income Recognized	30	18
Installment and Credit Cards [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	1,154	1,587
Unpaid Principal Balance	1,225	1,795
Related Allowance	195	308
Average Recorded Investment	1,199	1,736
Interest Income Recognized	30	58
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	1,154	1,587
Unpaid Principal Balance	1,225	1,795
Related Allowance	195	308
Average Recorded Investment	1,199	1,736
Interest Income Recognized	30	58
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
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	71,352	75,809
Unpaid Principal Balance	76,117	81,320
Related Allowance	12,462	13,797
Average Recorded Investment	72,909	77,254
Interest Income Recognized	2,500	2,442
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	66,590	68,748
Unpaid Principal Balance	71,084	74,005
Related Allowance	12,462	13,797
Average Recorded Investment	68,183	70,030
Interest Income Recognized	2,374	2,307
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	4,762	7,061
Unpaid Principal Balance	5,033	7,315
Related Allowance	0	0
Average Recorded Investment	4,726	7,224
Interest Income Recognized	126	135
Consumer Loan [Member]
Summarize of nonaccrual loans, accruing loans past due 90 days or more, and restructured loans
Recorded Investment	94,819	102,056
Unpaid Principal Balance	101,875	110,506
Related Allowance	22,775	25,487
Average Recorded Investment	97,276	104,928
Interest Income Recognized	3,707	3,775
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	89,513	94,209
Unpaid Principal Balance	96,298	102,385
Related Allowance	22,775	25,487
Average Recorded Investment	92,006	96,853
Interest Income Recognized	3,551	3,622
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	5,306	7,847
Unpaid Principal Balance	5,577	8,121
Related Allowance	0	0
Average Recorded Investment	5,270	8,075
Interest Income Recognized	$ 156	$ 153