Loans, Allowance for Credit Losses, and Credit Quality Loans by Past Due Status (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Summarized details of Loans
Total Past Due	$ 111,045	$ 127,000
Current	18,192,207	17,466,846
Total loans	18,303,252	17,593,846
Accruing loans past due 90 days or more	$ 2,000	$ 2,000
Percent of current nonaccrual loans	59.00%	54.00%
Commercial And Industrial Financing Receivable [Member]
Summarized details of Loans
Total Past Due	$ 20,486	$ 26,654
Current	6,187,706	5,879,248
Total loans	6,208,192	5,905,902
Commercial Real Estate Owner Occupied [Member]
Summarized details of Loans
Total Past Due	10,348	22,462
Current	967,835	985,475
Total loans	978,183	1,007,937
Lease Financing [Member]
Summarized details of Loans
Total Past Due	504	513
Current	46,396	51,016
Total loans	46,900	51,529
Commercial And Business Lending [Member]
Summarized details of Loans
Total Past Due	31,338	49,629
Current	7,201,937	6,915,739
Total loans	7,233,275	6,965,368
Commercial Real Estate Investor [Member]
Summarized details of Loans
Total Past Due	25,011	16,289
Current	3,101,429	3,040,196
Total loans	3,126,440	3,056,485
Real Estate Construction [Member]
Summarized details of Loans
Total Past Due	902	1,942
Current	1,091,406	1,007,014
Total loans	1,092,308	1,008,956
Commercial Real Estate Lending [Member]
Summarized details of Loans
Total Past Due	25,913	18,231
Current	4,192,835	4,047,210
Total loans	4,218,748	4,065,441
Commercial Financing Receivable [Member]
Summarized details of Loans
Total Past Due	57,251	67,860
Current	11,394,772	10,962,949
Total loans	11,452,023	11,030,809
Home Equity [Member]
Summarized details of Loans
Total Past Due	20,392	25,158
Current	1,510,071	1,610,900
Total loans	1,530,463	1,636,058
Installment and Credit Cards [Member]
Summarized details of Loans
Total Past Due	3,263	3,525
Current	427,560	450,694
Total loans	430,823	454,219
Residential Mortgage [Member]
Summarized details of Loans
Total Past Due	30,139	30,457
Current	4,859,804	4,442,303
Total loans	4,889,943	4,472,760
Consumer Loan [Member]
Summarized details of Loans
Total Past Due	53,794	59,140
Current	6,797,435	6,503,897
Total loans	6,851,229	6,563,037
Accruing Loans [Member]
Summarized details of Loans
Total Past Due	44,572	44,751
Current	18,098,319	17,371,682
Total loans	18,142,891	17,416,433
Accruing Loans [Member] | Commercial And Industrial Financing Receivable [Member]
Summarized details of Loans
Total Past Due	6,619	15,001
Current	6,136,835	5,841,238
Total loans	6,143,454	5,856,239
Accruing Loans [Member] | Commercial Real Estate Owner Occupied [Member]
Summarized details of Loans
Total Past Due	1,090	10,628
Current	958,272	971,484
Total loans	959,362	982,112
Accruing Loans [Member] | Lease Financing [Member]
Summarized details of Loans
Total Past Due	0	0
Current	45,244	49,728
Total loans	45,244	49,728
Accruing Loans [Member] | Commercial And Business Lending [Member]
Summarized details of Loans
Total Past Due	7,709	25,629
Current	7,140,351	6,862,450
Total loans	7,148,060	6,888,079
Accruing Loans [Member] | Commercial Real Estate Investor [Member]
Summarized details of Loans
Total Past Due	19,843	1,208
Current	3,100,507	3,032,592
Total loans	3,120,350	3,033,800
Accruing Loans [Member] | Real Estate Construction [Member]
Summarized details of Loans
Total Past Due	312	984
Current	1,089,090	1,002,573
Total loans	1,089,402	1,003,557
Accruing Loans [Member] | Commercial Real Estate Lending [Member]
Summarized details of Loans
Total Past Due	20,155	2,192
Current	4,189,597	4,035,165
Total loans	4,209,752	4,037,357
Accruing Loans [Member] | Commercial Financing Receivable [Member]
Summarized details of Loans
Total Past Due	27,864	27,821
Current	11,329,948	10,897,615
Total loans	11,357,812	10,925,436
Accruing Loans [Member] | Home Equity [Member]
Summarized details of Loans
Total Past Due	8,770	10,635
Current	1,503,287	1,603,682
Total loans	1,512,057	1,614,317
Accruing Loans [Member] | Installment and Credit Cards [Member]
Summarized details of Loans
Total Past Due	3,024	3,249
Current	427,345	450,357
Total loans	430,369	453,606
Accruing Loans [Member] | Residential Mortgage [Member]
Summarized details of Loans
Total Past Due	4,914	3,046
Current	4,837,739	4,420,028
Total loans	4,842,653	4,423,074
Accruing Loans [Member] | Consumer Loan [Member]
Summarized details of Loans
Total Past Due	16,708	16,930
Current	6,768,371	6,474,067
Total loans	6,785,079	6,490,997
Nonaccrual Loan [Member]
Summarized details of Loans
Total Past Due	66,473	82,249
Current	93,888	95,164
Total loans	160,361	177,413
Nonaccrual Loan [Member] | Commercial And Industrial Financing Receivable [Member]
Summarized details of Loans
Total Past Due	13,867	11,653
Current	50,871	38,010
Total loans	64,738	49,663
Nonaccrual Loan [Member] | Commercial Real Estate Owner Occupied [Member]
Summarized details of Loans
Total Past Due	9,258	11,834
Current	9,563	13,991
Total loans	18,821	25,825
Nonaccrual Loan [Member] | Lease Financing [Member]
Summarized details of Loans
Total Past Due	504	513
Current	1,152	1,288
Total loans	1,656	1,801
Nonaccrual Loan [Member] | Commercial And Business Lending [Member]
Summarized details of Loans
Total Past Due	23,629	24,000
Current	61,586	53,289
Total loans	85,215	77,289
Nonaccrual Loan [Member] | Commercial Real Estate Investor [Member]
Summarized details of Loans
Total Past Due	5,168	15,081
Current	922	7,604
Total loans	6,090	22,685
Nonaccrual Loan [Member] | Real Estate Construction [Member]
Summarized details of Loans
Total Past Due	590	958
Current	2,316	4,441
Total loans	2,906	5,399
Nonaccrual Loan [Member] | Commercial Real Estate Lending [Member]
Summarized details of Loans
Total Past Due	5,758	16,039
Current	3,238	12,045
Total loans	8,996	28,084
Nonaccrual Loan [Member] | Commercial Financing Receivable [Member]
Summarized details of Loans
Total Past Due	29,387	40,039
Current	64,824	65,334
Total loans	94,211	105,373
Nonaccrual Loan [Member] | Home Equity [Member]
Summarized details of Loans
Total Past Due	11,622	14,523
Current	6,784	7,218
Total loans	18,406	21,741
Nonaccrual Loan [Member] | Installment and Credit Cards [Member]
Summarized details of Loans
Total Past Due	239	276
Current	215	337
Total loans	454	613
Nonaccrual Loan [Member] | Residential Mortgage [Member]
Summarized details of Loans
Total Past Due	25,225	27,411
Current	22,065	22,275
Total loans	47,290	49,686
Nonaccrual Loan [Member] | Consumer Loan [Member]
Summarized details of Loans
Total Past Due	37,086	42,210
Current	29,064	29,830
Total loans	66,150	72,040
Financing Receivables, 30 to 59 Days Past Due [Member]
Summarized details of Loans
Total Past Due	45,781	39,373
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial And Industrial Financing Receivable [Member]
Summarized details of Loans
Total Past Due	6,548	5,338
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Real Estate Owner Occupied [Member]
Summarized details of Loans
Total Past Due	1,113	11,626
Financing Receivables, 30 to 59 Days Past Due [Member] | Lease Financing [Member]
Summarized details of Loans
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial And Business Lending [Member]
Summarized details of Loans
Total Past Due	7,661	16,964
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Real Estate Investor [Member]
Summarized details of Loans
Total Past Due	19,911	2,569
Financing Receivables, 30 to 59 Days Past Due [Member] | Real Estate Construction [Member]
Summarized details of Loans
Total Past Due	284	1,038
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Real Estate Lending [Member]
Summarized details of Loans
Total Past Due	20,195	3,607
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Financing Receivable [Member]
Summarized details of Loans
Total Past Due	27,856	20,571
Financing Receivables, 30 to 59 Days Past Due [Member] | Home Equity [Member]
Summarized details of Loans
Total Past Due	8,344	9,652
Financing Receivables, 30 to 59 Days Past Due [Member] | Installment and Credit Cards [Member]
Summarized details of Loans
Total Past Due	1,094	1,282
Financing Receivables, 30 to 59 Days Past Due [Member] | Residential Mortgage [Member]
Summarized details of Loans
Total Past Due	8,487	7,868
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer Loan [Member]
Summarized details of Loans
Total Past Due	17,925	18,802
Financing Receivables, 30 to 59 Days Past Due [Member] | Accruing Loans [Member]
Summarized details of Loans
Total Past Due	36,086	26,621
Financing Receivables, 30 to 59 Days Past Due [Member] | Accruing Loans [Member] | Commercial And Industrial Financing Receivable [Member]
Summarized details of Loans
Total Past Due	5,272	4,466
Financing Receivables, 30 to 59 Days Past Due [Member] | Accruing Loans [Member] | Commercial Real Estate Owner Occupied [Member]
Summarized details of Loans
Total Past Due	855	8,429
Financing Receivables, 30 to 59 Days Past Due [Member] | Accruing Loans [Member] | Lease Financing [Member]
Summarized details of Loans
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Accruing Loans [Member] | Commercial And Business Lending [Member]
Summarized details of Loans
Total Past Due	6,127	12,895
Financing Receivables, 30 to 59 Days Past Due [Member] | Accruing Loans [Member] | Commercial Real Estate Investor [Member]
Summarized details of Loans
Total Past Due	17,449	712
Financing Receivables, 30 to 59 Days Past Due [Member] | Accruing Loans [Member] | Real Estate Construction [Member]
Summarized details of Loans
Total Past Due	203	951
Financing Receivables, 30 to 59 Days Past Due [Member] | Accruing Loans [Member] | Commercial Real Estate Lending [Member]
Summarized details of Loans
Total Past Due	17,652	1,663
Financing Receivables, 30 to 59 Days Past Due [Member] | Accruing Loans [Member] | Commercial Financing Receivable [Member]
Summarized details of Loans
Total Past Due	23,779	14,558
Financing Receivables, 30 to 59 Days Past Due [Member] | Accruing Loans [Member] | Home Equity [Member]
Summarized details of Loans
Total Past Due	6,527	8,037
Financing Receivables, 30 to 59 Days Past Due [Member] | Accruing Loans [Member] | Installment and Credit Cards [Member]
Summarized details of Loans
Total Past Due	1,055	1,186
Financing Receivables, 30 to 59 Days Past Due [Member] | Accruing Loans [Member] | Residential Mortgage [Member]
Summarized details of Loans
Total Past Due	4,725	2,840
Financing Receivables, 30 to 59 Days Past Due [Member] | Accruing Loans [Member] | Consumer Loan [Member]
Summarized details of Loans
Total Past Due	12,307	12,063
Financing Receivables, 30 to 59 Days Past Due [Member] | Nonaccrual Loan [Member]
Summarized details of Loans
Total Past Due	9,695	12,752
Financing Receivables, 30 to 59 Days Past Due [Member] | Nonaccrual Loan [Member] | Commercial And Industrial Financing Receivable [Member]
Summarized details of Loans
Total Past Due	1,276	872
Financing Receivables, 30 to 59 Days Past Due [Member] | Nonaccrual Loan [Member] | Commercial Real Estate Owner Occupied [Member]
Summarized details of Loans
Total Past Due	258	3,197
Financing Receivables, 30 to 59 Days Past Due [Member] | Nonaccrual Loan [Member] | Lease Financing [Member]
Summarized details of Loans
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Nonaccrual Loan [Member] | Commercial And Business Lending [Member]
Summarized details of Loans
Total Past Due	1,534	4,069
Financing Receivables, 30 to 59 Days Past Due [Member] | Nonaccrual Loan [Member] | Commercial Real Estate Investor [Member]
Summarized details of Loans
Total Past Due	2,462	1,857
Financing Receivables, 30 to 59 Days Past Due [Member] | Nonaccrual Loan [Member] | Real Estate Construction [Member]
Summarized details of Loans
Total Past Due	81	87
Financing Receivables, 30 to 59 Days Past Due [Member] | Nonaccrual Loan [Member] | Commercial Real Estate Lending [Member]
Summarized details of Loans
Total Past Due	2,543	1,944
Financing Receivables, 30 to 59 Days Past Due [Member] | Nonaccrual Loan [Member] | Commercial Financing Receivable [Member]
Summarized details of Loans
Total Past Due	4,077	6,013
Financing Receivables, 30 to 59 Days Past Due [Member] | Nonaccrual Loan [Member] | Home Equity [Member]
Summarized details of Loans
Total Past Due	1,817	1,615
Financing Receivables, 30 to 59 Days Past Due [Member] | Nonaccrual Loan [Member] | Installment and Credit Cards [Member]
Summarized details of Loans
Total Past Due	39	96
Financing Receivables, 30 to 59 Days Past Due [Member] | Nonaccrual Loan [Member] | Residential Mortgage [Member]
Summarized details of Loans
Total Past Due	3,762	5,028
Financing Receivables, 30 to 59 Days Past Due [Member] | Nonaccrual Loan [Member] | Consumer Loan [Member]
Summarized details of Loans
Total Past Due	5,618	6,739
Financing Receivables, 60 to 89 Days Past Due [Member]
Summarized details of Loans
Total Past Due	18,026	22,705
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial And Industrial Financing Receivable [Member]
Summarized details of Loans
Total Past Due	4,769	10,908
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Real Estate Owner Occupied [Member]
Summarized details of Loans
Total Past Due	1,293	2,240
Financing Receivables, 60 to 89 Days Past Due [Member] | Lease Financing [Member]
Summarized details of Loans
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial And Business Lending [Member]
Summarized details of Loans
Total Past Due	6,062	13,148
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Real Estate Investor [Member]
Summarized details of Loans
Total Past Due	3,034	955
Financing Receivables, 60 to 89 Days Past Due [Member] | Real Estate Construction [Member]
Summarized details of Loans
Total Past Due	159	106
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Real Estate Lending [Member]
Summarized details of Loans
Total Past Due	3,193	1,061
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Financing Receivable [Member]
Summarized details of Loans
Total Past Due	9,255	14,209
Financing Receivables, 60 to 89 Days Past Due [Member] | Home Equity [Member]
Summarized details of Loans
Total Past Due	3,992	4,852
Financing Receivables, 60 to 89 Days Past Due [Member] | Installment and Credit Cards [Member]
Summarized details of Loans
Total Past Due	632	785
Financing Receivables, 60 to 89 Days Past Due [Member] | Residential Mortgage [Member]
Summarized details of Loans
Total Past Due	4,147	2,859
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer Loan [Member]
Summarized details of Loans
Total Past Due	8,771	8,496
Financing Receivables, 60 to 89 Days Past Due [Member] | Accruing Loans [Member]
Summarized details of Loans
Total Past Due	6,824	16,507
Financing Receivables, 60 to 89 Days Past Due [Member] | Accruing Loans [Member] | Commercial And Industrial Financing Receivable [Member]
Summarized details of Loans
Total Past Due	1,085	10,281
Financing Receivables, 60 to 89 Days Past Due [Member] | Accruing Loans [Member] | Commercial Real Estate Owner Occupied [Member]
Summarized details of Loans
Total Past Due	235	2,199
Financing Receivables, 60 to 89 Days Past Due [Member] | Accruing Loans [Member] | Lease Financing [Member]
Summarized details of Loans
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Accruing Loans [Member] | Commercial And Business Lending [Member]
Summarized details of Loans
Total Past Due	1,320	12,480
Financing Receivables, 60 to 89 Days Past Due [Member] | Accruing Loans [Member] | Commercial Real Estate Investor [Member]
Summarized details of Loans
Total Past Due	2,394	496
Financing Receivables, 60 to 89 Days Past Due [Member] | Accruing Loans [Member] | Real Estate Construction [Member]
Summarized details of Loans
Total Past Due	109	33
Financing Receivables, 60 to 89 Days Past Due [Member] | Accruing Loans [Member] | Commercial Real Estate Lending [Member]
Summarized details of Loans
Total Past Due	2,503	529
Financing Receivables, 60 to 89 Days Past Due [Member] | Accruing Loans [Member] | Commercial Financing Receivable [Member]
Summarized details of Loans
Total Past Due	3,823	13,009
Financing Receivables, 60 to 89 Days Past Due [Member] | Accruing Loans [Member] | Home Equity [Member]
Summarized details of Loans
Total Past Due	2,212	2,546
Financing Receivables, 60 to 89 Days Past Due [Member] | Accruing Loans [Member] | Installment and Credit Cards [Member]
Summarized details of Loans
Total Past Due	600	746
Financing Receivables, 60 to 89 Days Past Due [Member] | Accruing Loans [Member] | Residential Mortgage [Member]
Summarized details of Loans
Total Past Due	189	206
Financing Receivables, 60 to 89 Days Past Due [Member] | Accruing Loans [Member] | Consumer Loan [Member]
Summarized details of Loans
Total Past Due	3,001	3,498
Financing Receivables, 60 to 89 Days Past Due [Member] | Nonaccrual Loan [Member]
Summarized details of Loans
Total Past Due	11,202	6,198
Financing Receivables, 60 to 89 Days Past Due [Member] | Nonaccrual Loan [Member] | Commercial And Industrial Financing Receivable [Member]
Summarized details of Loans
Total Past Due	3,684	627
Financing Receivables, 60 to 89 Days Past Due [Member] | Nonaccrual Loan [Member] | Commercial Real Estate Owner Occupied [Member]
Summarized details of Loans
Total Past Due	1,058	41
Financing Receivables, 60 to 89 Days Past Due [Member] | Nonaccrual Loan [Member] | Lease Financing [Member]
Summarized details of Loans
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Nonaccrual Loan [Member] | Commercial And Business Lending [Member]
Summarized details of Loans
Total Past Due	4,742	668
Financing Receivables, 60 to 89 Days Past Due [Member] | Nonaccrual Loan [Member] | Commercial Real Estate Investor [Member]
Summarized details of Loans
Total Past Due	640	459
Financing Receivables, 60 to 89 Days Past Due [Member] | Nonaccrual Loan [Member] | Real Estate Construction [Member]
Summarized details of Loans
Total Past Due	50	73
Financing Receivables, 60 to 89 Days Past Due [Member] | Nonaccrual Loan [Member] | Commercial Real Estate Lending [Member]
Summarized details of Loans
Total Past Due	690	532
Financing Receivables, 60 to 89 Days Past Due [Member] | Nonaccrual Loan [Member] | Commercial Financing Receivable [Member]
Summarized details of Loans
Total Past Due	5,432	1,200
Financing Receivables, 60 to 89 Days Past Due [Member] | Nonaccrual Loan [Member] | Home Equity [Member]
Summarized details of Loans
Total Past Due	1,780	2,306
Financing Receivables, 60 to 89 Days Past Due [Member] | Nonaccrual Loan [Member] | Installment and Credit Cards [Member]
Summarized details of Loans
Total Past Due	32	39
Financing Receivables, 60 to 89 Days Past Due [Member] | Nonaccrual Loan [Member] | Residential Mortgage [Member]
Summarized details of Loans
Total Past Due	3,958	2,653
Financing Receivables, 60 to 89 Days Past Due [Member] | Nonaccrual Loan [Member] | Consumer Loan [Member]
Summarized details of Loans
Total Past Due	5,770	4,998
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	47,238	64,922
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial And Industrial Financing Receivable [Member]
Summarized details of Loans
Total Past Due	9,169	10,408
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Real Estate Owner Occupied [Member]
Summarized details of Loans
Total Past Due	7,942	8,596
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Lease Financing [Member]
Summarized details of Loans
Total Past Due	504	513
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial And Business Lending [Member]
Summarized details of Loans
Total Past Due	17,615	19,517
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Real Estate Investor [Member]
Summarized details of Loans
Total Past Due	2,066	12,765
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Real Estate Construction [Member]
Summarized details of Loans
Total Past Due	459	798
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Real Estate Lending [Member]
Summarized details of Loans
Total Past Due	2,525	13,563
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Financing Receivable [Member]
Summarized details of Loans
Total Past Due	20,140	33,080
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Home Equity [Member]
Summarized details of Loans
Total Past Due	8,056	10,654
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Installment and Credit Cards [Member]
Summarized details of Loans
Total Past Due	1,537	1,458
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Residential Mortgage [Member]
Summarized details of Loans
Total Past Due	17,505	19,730
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Loan [Member]
Summarized details of Loans
Total Past Due	27,098	31,842
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Accruing Loans [Member]
Summarized details of Loans
Total Past Due	1,662	1,623
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Accruing Loans [Member] | Commercial And Industrial Financing Receivable [Member]
Summarized details of Loans
Total Past Due	262	254
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Accruing Loans [Member] | Commercial Real Estate Owner Occupied [Member]
Summarized details of Loans
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Accruing Loans [Member] | Lease Financing [Member]
Summarized details of Loans
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Accruing Loans [Member] | Commercial And Business Lending [Member]
Summarized details of Loans
Total Past Due	262	254
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Accruing Loans [Member] | Commercial Real Estate Investor [Member]
Summarized details of Loans
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Accruing Loans [Member] | Real Estate Construction [Member]
Summarized details of Loans
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Accruing Loans [Member] | Commercial Real Estate Lending [Member]
Summarized details of Loans
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Accruing Loans [Member] | Commercial Financing Receivable [Member]
Summarized details of Loans
Total Past Due	262	254
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Accruing Loans [Member] | Home Equity [Member]
Summarized details of Loans
Total Past Due	31	52
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Accruing Loans [Member] | Installment and Credit Cards [Member]
Summarized details of Loans
Total Past Due	1,369	1,317
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Accruing Loans [Member] | Residential Mortgage [Member]
Summarized details of Loans
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Accruing Loans [Member] | Consumer Loan [Member]
Summarized details of Loans
Total Past Due	1,400	1,369
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Nonaccrual Loan [Member]
Summarized details of Loans
Total Past Due	45,576	63,299
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Nonaccrual Loan [Member] | Commercial And Industrial Financing Receivable [Member]
Summarized details of Loans
Total Past Due	8,907	10,154
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Nonaccrual Loan [Member] | Commercial Real Estate Owner Occupied [Member]
Summarized details of Loans
Total Past Due	7,942	8,596
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Nonaccrual Loan [Member] | Lease Financing [Member]
Summarized details of Loans
Total Past Due	504	513
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Nonaccrual Loan [Member] | Commercial And Business Lending [Member]
Summarized details of Loans
Total Past Due	17,353	19,263
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Nonaccrual Loan [Member] | Commercial Real Estate Investor [Member]
Summarized details of Loans
Total Past Due	2,066	12,765
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Nonaccrual Loan [Member] | Real Estate Construction [Member]
Summarized details of Loans
Total Past Due	459	798
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Nonaccrual Loan [Member] | Commercial Real Estate Lending [Member]
Summarized details of Loans
Total Past Due	2,525	13,563
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Nonaccrual Loan [Member] | Commercial Financing Receivable [Member]
Summarized details of Loans
Total Past Due	19,878	32,826
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Nonaccrual Loan [Member] | Home Equity [Member]
Summarized details of Loans
Total Past Due	8,025	10,602
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Nonaccrual Loan [Member] | Installment and Credit Cards [Member]
Summarized details of Loans
Total Past Due	168	141
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Nonaccrual Loan [Member] | Residential Mortgage [Member]
Summarized details of Loans
Total Past Due	17,505	19,730
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Nonaccrual Loan [Member] | Consumer Loan [Member]
Summarized details of Loans
Total Past Due	$ 25,698	$ 30,473