Loans, Credit Quality Indicator by Vintage Year (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	$ 12,390	$ 53,246
Financing Receivable, Revolving	3,047,870	2,915,297
Financing Receivable, Originated in Current Fiscal Year	1,213,182	8,854,510
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	8,807,663	7,341,574
Financing Receivable, Originated Two Years before Latest Fiscal Year	7,135,000	3,469,992
Financing Receivable, Originated Three Years before Latest Fiscal Year	3,190,512	2,201,004
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,046,450	1,082,280
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	3,766,395	2,934,912
Total	29,207,072	28,799,569
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	1,739
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	1,189
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	263
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	17
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	29
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	2,264
Charge offs	5,501
Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	2,334	47,152
Financing Receivable, Revolving	2,920,518	2,795,551
Financing Receivable, Originated in Current Fiscal Year	1,160,532	8,711,468
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	8,608,857	7,226,734
Financing Receivable, Originated Two Years before Latest Fiscal Year	6,980,494	3,377,725
Financing Receivable, Originated Three Years before Latest Fiscal Year	3,121,688	2,101,861
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,014,384	1,047,522
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	3,654,303	2,834,303
Total	28,460,776	28,095,164
Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	19	52
Financing Receivable, Revolving	87,335	93,801
Financing Receivable, Originated in Current Fiscal Year	18,545	66,443
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	123,869	48,159
Financing Receivable, Originated Two Years before Latest Fiscal Year	53,560	20,772
Financing Receivable, Originated Three Years before Latest Fiscal Year	27,027	43,983
Financing Receivable, Originated Four Years before Latest Fiscal Year	25,189	9,778
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	34,497	43,350
Total	370,023	326,286
Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	141	447
Financing Receivable, Revolving	39,951	25,889
Financing Receivable, Originated in Current Fiscal Year	33,818	59,240
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	59,120	36,709
Financing Receivable, Originated Two Years before Latest Fiscal Year	61,903	56,016
Financing Receivable, Originated Three Years before Latest Fiscal Year	24,739	51,043
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,253	19,637
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	36,919	18,118
Total	258,704	266,651
Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	9,896	5,595
Financing Receivable, Revolving	65	56
Financing Receivable, Originated in Current Fiscal Year	287	17,360
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	15,816	29,972
Financing Receivable, Originated Two Years before Latest Fiscal Year	39,044	15,479
Financing Receivable, Originated Three Years before Latest Fiscal Year	17,058	4,116
Financing Receivable, Originated Four Years before Latest Fiscal Year	4,624	5,343
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	40,675	39,141
Total	117,569	111,467
Total commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	9,707	44,208
Financing Receivable, Revolving	2,361,089	2,206,480
Financing Receivable, Originated in Current Fiscal Year	886,324	6,122,430
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	6,060,562	5,034,805
Financing Receivable, Originated Two Years before Latest Fiscal Year	4,798,955	1,741,955
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,489,566	1,370,245
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,235,396	698,550
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,329,444	812,278
Total	18,161,335	17,986,742
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	823
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	2,152
Charge offs	(2,975)
Total commercial | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	71	39,835
Financing Receivable, Revolving	2,234,544	2,087,396
Financing Receivable, Originated in Current Fiscal Year	834,103	5,990,879
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	5,872,988	4,924,743
Financing Receivable, Originated Two Years before Latest Fiscal Year	4,649,837	1,656,149
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,429,370	1,275,996
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,208,578	669,213
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,258,628	750,399
Total	17,488,047	17,354,774
Total commercial | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	86,593	93,209
Financing Receivable, Originated in Current Fiscal Year	18,454	65,379
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	122,689	47,756
Financing Receivable, Originated Two Years before Latest Fiscal Year	53,408	20,671
Financing Receivable, Originated Three Years before Latest Fiscal Year	26,929	43,978
Financing Receivable, Originated Four Years before Latest Fiscal Year	25,151	9,732
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	33,775	42,952
Total	366,999	323,677
Total commercial | Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	128	447
Financing Receivable, Revolving	39,951	25,874
Financing Receivable, Originated in Current Fiscal Year	33,760	58,785
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	58,708	36,638
Financing Receivable, Originated Two Years before Latest Fiscal Year	61,354	56,016
Financing Receivable, Originated Three Years before Latest Fiscal Year	24,739	50,271
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,668	19,606
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	36,596	17,287
Total	256,776	264,476
Total commercial | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	9,508	3,926
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	8	7,387
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	6,177	25,668
Financing Receivable, Originated Two Years before Latest Fiscal Year	34,355	9,119
Financing Receivable, Originated Three Years before Latest Fiscal Year	8,528	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	445	1,640
Total	49,513	43,814
Total commercial | Asset-based lending & equipment finance
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	60,256	47,446
Financing Receivable, Originated in Current Fiscal Year	55,535	270,706
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	263,471	121,914
Financing Receivable, Originated Two Years before Latest Fiscal Year	125,609	18,082
Financing Receivable, Originated Three Years before Latest Fiscal Year	17,420	653
Financing Receivable, Originated Four Years before Latest Fiscal Year	543	85
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Total	522,834	458,887
Total commercial | Asset-based lending & equipment finance | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	60,256	47,446
Financing Receivable, Originated in Current Fiscal Year	55,535	269,258
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	262,074	121,914
Financing Receivable, Originated Two Years before Latest Fiscal Year	125,609	1,832
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,420	653
Financing Receivable, Originated Four Years before Latest Fiscal Year	543	85
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Total	505,437	441,189
Total commercial | Asset-based lending & equipment finance | Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	0	1,448
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,396	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	16,250
Financing Receivable, Originated Three Years before Latest Fiscal Year	16,000	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Total	17,396	17,698
Total commercial | Commercial and Industrial Sector
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	9,698	5,796
Financing Receivable, Revolving	2,130,000	2,009,089
Financing Receivable, Originated in Current Fiscal Year	338,716	3,024,861
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,942,451	2,272,895
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,169,643	580,757
Financing Receivable, Originated Three Years before Latest Fiscal Year	483,571	610,636
Financing Receivable, Originated Four Years before Latest Fiscal Year	558,983	330,794
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	723,583	471,535
Total	9,346,947	9,300,567
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	823
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	2,152
Charge offs	(2,975)
Total commercial | Commercial and Industrial Sector | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	71	1,423
Financing Receivable, Revolving	2,003,455	1,891,331
Financing Receivable, Originated in Current Fiscal Year	332,572	2,976,288
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,872,816	2,245,094
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,101,488	566,001
Financing Receivable, Originated Three Years before Latest Fiscal Year	467,455	572,467
Financing Receivable, Originated Four Years before Latest Fiscal Year	558,852	330,557
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	685,216	432,906
Total	9,021,853	9,014,644
Total commercial | Commercial and Industrial Sector | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	86,593	93,209
Financing Receivable, Originated in Current Fiscal Year	0	3,411
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	30,540	23,607
Financing Receivable, Originated Two Years before Latest Fiscal Year	31,161	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,913	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	19
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	33,501	32,497
Total	184,709	152,744
Total commercial | Commercial and Industrial Sector | Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	128	447
Financing Receivable, Revolving	39,951	24,549
Financing Receivable, Originated in Current Fiscal Year	6,145	39,952
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	34,388	4,193
Financing Receivable, Originated Two Years before Latest Fiscal Year	27,494	5,637
Financing Receivable, Originated Three Years before Latest Fiscal Year	4,675	38,169
Financing Receivable, Originated Four Years before Latest Fiscal Year	132	218
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	4,865	6,133
Total	117,650	118,851
Total commercial | Commercial and Industrial Sector | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	9,500	3,926
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	0	5,210
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	4,707	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	9,500	9,119
Financing Receivable, Originated Three Years before Latest Fiscal Year	8,528	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Total	22,735	14,329
Total commercial | Commercial real estate — owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	8	0
Financing Receivable, Revolving	22,344	13,772
Financing Receivable, Originated in Current Fiscal Year	89,914	212,883
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	208,269	236,769
Financing Receivable, Originated Two Years before Latest Fiscal Year	245,950	170,624
Financing Receivable, Originated Three Years before Latest Fiscal Year	157,555	172,630
Financing Receivable, Originated Four Years before Latest Fiscal Year	162,667	83,570
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	163,536	101,475
Total	1,050,236	991,722
Total commercial | Commercial real estate — owner occupied | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	22,344	12,447
Financing Receivable, Originated in Current Fiscal Year	87,095	211,645
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	205,922	225,627
Financing Receivable, Originated Two Years before Latest Fiscal Year	234,300	163,965
Financing Receivable, Originated Three Years before Latest Fiscal Year	150,009	160,370
Financing Receivable, Originated Four Years before Latest Fiscal Year	152,649	73,487
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	151,106	97,420
Total	1,003,424	944,961
Total commercial | Commercial real estate — owner occupied | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	1,136
Financing Receivable, Originated Three Years before Latest Fiscal Year	3,483	1,491
Financing Receivable, Originated Four Years before Latest Fiscal Year	9,500	9,713
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	274	0
Total	13,257	12,339
Total commercial | Commercial real estate — owner occupied | Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	1,325
Financing Receivable, Originated in Current Fiscal Year	2,812	1,238
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	877	11,141
Financing Receivable, Originated Two Years before Latest Fiscal Year	11,651	5,523
Financing Receivable, Originated Three Years before Latest Fiscal Year	4,064	10,769
Financing Receivable, Originated Four Years before Latest Fiscal Year	518	370
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	12,156	4,055
Total	32,077	34,422
Total commercial | Commercial real estate — owner occupied | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	8
Financing Receivable, Revolving	0
Financing Receivable, Originated in Current Fiscal Year	8
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,470
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Total	1,478
Total commercial | Commercial and business lending
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	9,707	5,796
Financing Receivable, Revolving	2,212,600	2,070,307
Financing Receivable, Originated in Current Fiscal Year	484,166	3,508,450
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,414,190	2,631,578
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,541,203	769,463
Financing Receivable, Originated Three Years before Latest Fiscal Year	658,546	783,919
Financing Receivable, Originated Four Years before Latest Fiscal Year	722,194	414,449
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	887,119	573,010
Total	10,920,017	10,751,176
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	823
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	2,152
Charge offs	(2,975)
Total commercial | Commercial and business lending | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	71	1,423
Financing Receivable, Revolving	2,086,055	1,951,224
Financing Receivable, Originated in Current Fiscal Year	475,201	3,457,191
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,340,812	2,592,636
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,461,397	731,798
Financing Receivable, Originated Three Years before Latest Fiscal Year	618,883	733,490
Financing Receivable, Originated Four Years before Latest Fiscal Year	712,044	404,129
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	836,323	530,326
Total	10,530,715	10,400,794
Total commercial | Commercial and business lending | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	86,593	93,209
Financing Receivable, Originated in Current Fiscal Year	0	3,411
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	30,540	23,607
Financing Receivable, Originated Two Years before Latest Fiscal Year	31,161	1,136
Financing Receivable, Originated Three Years before Latest Fiscal Year	6,396	1,491
Financing Receivable, Originated Four Years before Latest Fiscal Year	9,500	9,732
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	33,775	32,497
Total	197,965	165,083
Total commercial | Commercial and business lending | Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	128	447
Financing Receivable, Revolving	39,951	25,874
Financing Receivable, Originated in Current Fiscal Year	8,956	42,638
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	36,661	15,335
Financing Receivable, Originated Two Years before Latest Fiscal Year	39,145	27,410
Financing Receivable, Originated Three Years before Latest Fiscal Year	24,739	48,938
Financing Receivable, Originated Four Years before Latest Fiscal Year	649	589
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	17,021	10,188
Total	167,124	170,971
Total commercial | Commercial and business lending | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	9,508	3,926
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	8	5,210
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	6,177	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	9,500	9,119
Financing Receivable, Originated Three Years before Latest Fiscal Year	8,528	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Total	24,213	14,329
Total commercial | Commercial real estate — investor
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	38,412
Financing Receivable, Revolving	118,873	106,280
Financing Receivable, Originated in Current Fiscal Year	367,555	1,713,387
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,620,454	1,490,120
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,445,246	718,117
Financing Receivable, Originated Three Years before Latest Fiscal Year	620,991	541,177
Financing Receivable, Originated Four Years before Latest Fiscal Year	490,042	281,875
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	431,088	229,387
Total	5,094,249	5,080,344
Total commercial | Commercial real estate — investor | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	38,412
Financing Receivable, Revolving	118,873	106,280
Financing Receivable, Originated in Current Fiscal Year	324,298	1,633,094
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,506,258	1,419,000
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,375,935	683,121
Financing Receivable, Originated Three Years before Latest Fiscal Year	612,765	530,444
Financing Receivable, Originated Four Years before Latest Fiscal Year	489,024	262,858
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	411,246	210,299
Total	4,838,398	4,845,096
Total commercial | Commercial real estate — investor | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	18,454	61,968
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	92,149	24,149
Financing Receivable, Originated Two Years before Latest Fiscal Year	22,247	7,361
Financing Receivable, Originated Three Years before Latest Fiscal Year	8,225	9,400
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	10,455
Total	141,075	113,333
Total commercial | Commercial real estate — investor | Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	24,803	16,147
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	22,047	21,303
Financing Receivable, Originated Two Years before Latest Fiscal Year	22,209	27,635
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	1,333
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,019	19,017
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	19,575	7,099
Total	89,653	92,535
Total commercial | Commercial real estate — investor | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	0	2,177
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	25,668
Financing Receivable, Originated Two Years before Latest Fiscal Year	24,855	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	267	1,535
Total	25,122	29,380
Total commercial | Real Estate Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	29,616	29,892
Financing Receivable, Originated in Current Fiscal Year	34,604	900,593
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,025,918	913,107
Financing Receivable, Originated Two Years before Latest Fiscal Year	812,505	254,374
Financing Receivable, Originated Three Years before Latest Fiscal Year	210,030	45,149
Financing Receivable, Originated Four Years before Latest Fiscal Year	23,160	2,226
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	11,237	9,880
Total	2,147,070	2,155,222
Total commercial | Real Estate Construction | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	29,616	29,892
Financing Receivable, Originated in Current Fiscal Year	34,604	900,593
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,025,918	913,107
Financing Receivable, Originated Two Years before Latest Fiscal Year	812,505	241,230
Financing Receivable, Originated Three Years before Latest Fiscal Year	197,722	12,062
Financing Receivable, Originated Four Years before Latest Fiscal Year	7,510	2,226
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	11,059	9,775
Total	2,118,934	2,108,885
Total commercial | Real Estate Construction | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	12,174
Financing Receivable, Originated Three Years before Latest Fiscal Year	12,308	33,087
Financing Receivable, Originated Four Years before Latest Fiscal Year	15,651	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Total	27,958	45,261
Total commercial | Real Estate Construction | Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan		0
Financing Receivable, Revolving		0
Financing Receivable, Originated in Current Fiscal Year		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0
Financing Receivable, Originated Two Years before Latest Fiscal Year		970
Financing Receivable, Originated Three Years before Latest Fiscal Year		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0
Total		970
Total commercial | Real Estate Construction | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	178	105
Total	178	105
Total commercial | Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	38,412
Financing Receivable, Revolving	148,489	136,173
Financing Receivable, Originated in Current Fiscal Year	402,159	2,613,980
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,646,372	2,403,227
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,257,752	972,492
Financing Receivable, Originated Three Years before Latest Fiscal Year	831,020	586,326
Financing Receivable, Originated Four Years before Latest Fiscal Year	513,203	284,101
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	442,325	239,267
Total	7,241,318	7,235,565
Total commercial | Commercial Real Estate | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	38,412
Financing Receivable, Revolving	148,489	136,173
Financing Receivable, Originated in Current Fiscal Year	358,901	2,533,687
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,532,176	2,332,107
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,188,440	924,351
Financing Receivable, Originated Three Years before Latest Fiscal Year	810,487	542,505
Financing Receivable, Originated Four Years before Latest Fiscal Year	496,533	265,083
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	422,305	220,073
Total	6,957,332	6,953,981
Total commercial | Commercial Real Estate | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	18,454	61,968
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	92,149	24,149
Financing Receivable, Originated Two Years before Latest Fiscal Year	22,247	19,535
Financing Receivable, Originated Three Years before Latest Fiscal Year	20,533	42,487
Financing Receivable, Originated Four Years before Latest Fiscal Year	15,651	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	10,455
Total	169,033	158,595
Total commercial | Commercial Real Estate | Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	24,803	16,147
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	22,047	21,303
Financing Receivable, Originated Two Years before Latest Fiscal Year	22,209	28,605
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	1,333
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,019	19,017
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	19,575	7,099
Total	89,653	93,505
Total commercial | Commercial Real Estate | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	0	2,177
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	25,668
Financing Receivable, Originated Two Years before Latest Fiscal Year	24,855	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	445	1,640
Total	25,300	29,485
Total consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	2,683	9,038
Financing Receivable, Revolving	686,781	708,817
Financing Receivable, Originated in Current Fiscal Year	326,858	2,732,080
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,747,101	2,306,769
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,336,046	1,728,037
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,700,946	830,759
Financing Receivable, Originated Four Years before Latest Fiscal Year	811,054	383,731
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,436,951	2,122,635
Total	11,045,737	10,812,828
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	916
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	1,189
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	263
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	17
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	29
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	112
Charge offs	(2,525)
Total consumer | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	2,263	7,318
Financing Receivable, Revolving	685,974	708,154
Financing Receivable, Originated in Current Fiscal Year	326,429	2,720,589
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,735,869	2,301,991
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,330,657	1,721,576
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,692,318	825,866
Financing Receivable, Originated Four Years before Latest Fiscal Year	805,806	378,310
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,395,676	2,083,904
Total	10,972,729	10,740,390
Total consumer | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	19	52
Financing Receivable, Revolving	742	592
Financing Receivable, Originated in Current Fiscal Year	91	1,063
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,181	403
Financing Receivable, Originated Two Years before Latest Fiscal Year	152	101
Financing Receivable, Originated Three Years before Latest Fiscal Year	98	5
Financing Receivable, Originated Four Years before Latest Fiscal Year	39	47
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	722	398
Total	3,024	2,609
Total consumer | Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	14	0
Financing Receivable, Revolving	0	15
Financing Receivable, Originated in Current Fiscal Year	59	455
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	413	71
Financing Receivable, Originated Two Years before Latest Fiscal Year	548	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	772
Financing Receivable, Originated Four Years before Latest Fiscal Year	585	31
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	323	831
Total	1,928	2,175
Total consumer | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	388	1,668
Financing Receivable, Revolving	65	56
Financing Receivable, Originated in Current Fiscal Year	279	9,973
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	9,639	4,304
Financing Receivable, Originated Two Years before Latest Fiscal Year	4,688	6,360
Financing Receivable, Originated Three Years before Latest Fiscal Year	8,530	4,116
Financing Receivable, Originated Four Years before Latest Fiscal Year	4,624	5,343
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	40,231	37,501
Total	68,056	67,654
Total consumer | Residential mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	85,616	1,419,527
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,498,448	2,188,332
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,226,164	1,722,979
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,696,342	821,645
Financing Receivable, Originated Four Years before Latest Fiscal Year	803,113	375,768
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,295,481	1,983,299
Total	8,605,164	8,511,550
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	107
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	19
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	8
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	2
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	32
Charge offs	(168)
Total consumer | Residential mortgage | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	85,201	1,410,566
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,490,848	2,184,125
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,221,515	1,716,663
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,687,853	817,164
Financing Receivable, Originated Four Years before Latest Fiscal Year	798,205	370,724
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,261,293	1,951,406
Total	8,544,915	8,450,648
Total consumer | Residential mortgage | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	91	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	284
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	96
Financing Receivable, Originated Three Years before Latest Fiscal Year	95	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	105	63
Total	291	444
Total consumer | Residential mortgage | Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	45	455
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	216	71
Financing Receivable, Originated Two Years before Latest Fiscal Year	548	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	738
Financing Receivable, Originated Four Years before Latest Fiscal Year	551	29
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	323	685
Total	1,684	1,978
Total consumer | Residential mortgage | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	279	8,506
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	7,384	3,851
Financing Receivable, Originated Two Years before Latest Fiscal Year	4,101	6,219
Financing Receivable, Originated Three Years before Latest Fiscal Year	8,394	3,744
Financing Receivable, Originated Four Years before Latest Fiscal Year	4,356	5,014
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	33,760	31,145
Total	58,274	58,480
Total consumer | Auto finance
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	239,138	1,273,406
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,211,778	106,551
Financing Receivable, Originated Two Years before Latest Fiscal Year	98,906	333
Financing Receivable, Originated Three Years before Latest Fiscal Year	299	1,276
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,029	446
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	388	61
Total	1,551,538	1,382,073
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	922
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	181
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	0
Charge offs	(1,103)
Total consumer | Auto finance | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	239,138	1,271,205
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,208,658	106,102
Financing Receivable, Originated Two Years before Latest Fiscal Year	98,290	333
Financing Receivable, Originated Three Years before Latest Fiscal Year	299	1,267
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,020	446
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	388	61
Total	1,547,793	1,379,414
Total consumer | Auto finance | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	0	1,052
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,168	118
Financing Receivable, Originated Two Years before Latest Fiscal Year	141	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Total	1,310	1,170
Total consumer | Auto finance | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	0	1,149
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,952	331
Financing Receivable, Originated Two Years before Latest Fiscal Year	474	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	9
Financing Receivable, Originated Four Years before Latest Fiscal Year	9	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Total	2,436	1,490
Total consumer | Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	2,592	8,891
Financing Receivable, Revolving	495,900	508,329
Financing Receivable, Originated in Current Fiscal Year	244	31,695
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	31,583	6,610
Financing Receivable, Originated Two Years before Latest Fiscal Year	6,941	2,243
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,374	6,538
Financing Receivable, Originated Four Years before Latest Fiscal Year	6,047	7,333
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	66,698	61,605
Total	609,787	624,353
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	43
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	14
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	22
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	33
Charge offs	(111)
Total consumer | Home equity | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	2,173	7,254
Financing Receivable, Revolving	495,755	508,212
Financing Receivable, Originated in Current Fiscal Year	230	31,389
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	31,083	6,508
Financing Receivable, Originated Two Years before Latest Fiscal Year	6,835	2,112
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,243	6,197
Financing Receivable, Originated Four Years before Latest Fiscal Year	5,732	6,966
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	59,670	54,827
Total	601,549	616,211
Total consumer | Home equity | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	18	47
Financing Receivable, Revolving	124	102
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	29	47
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	594	310
Total	747	458
Total consumer | Home equity | Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	14	0
Financing Receivable, Revolving	0	15
Financing Receivable, Originated in Current Fiscal Year	14	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	196	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	34
Financing Receivable, Originated Four Years before Latest Fiscal Year	34	2
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	146
Total	244	197
Total consumer | Home equity | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	388	1,590
Financing Receivable, Revolving	20	0
Financing Receivable, Originated in Current Fiscal Year	0	306
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	303	102
Financing Receivable, Originated Two Years before Latest Fiscal Year	106	131
Financing Receivable, Originated Three Years before Latest Fiscal Year	131	307
Financing Receivable, Originated Four Years before Latest Fiscal Year	252	319
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	6,434	6,322
Total	7,246	7,487
Total consumer | Other consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	91	147
Financing Receivable, Revolving	190,881	200,488
Financing Receivable, Originated in Current Fiscal Year	1,860	7,452
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	5,292	5,276
Financing Receivable, Originated Two Years before Latest Fiscal Year	4,035	2,482
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,930	1,300
Financing Receivable, Originated Four Years before Latest Fiscal Year	866	184
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	74,384	77,670
Total	279,248	294,851
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	916
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	117
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	49
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	9
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	5
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	48
Charge offs	(1,144)
Total consumer | Other consumer | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	90	64
Financing Receivable, Revolving	190,219	199,942
Financing Receivable, Originated in Current Fiscal Year	1,860	7,429
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	5,279	5,256
Financing Receivable, Originated Two Years before Latest Fiscal Year	4,017	2,468
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,922	1,238
Financing Receivable, Originated Four Years before Latest Fiscal Year	849	174
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	74,324	77,611
Total	278,471	294,117
Total consumer | Other consumer | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	1	6
Financing Receivable, Revolving	617	490
Financing Receivable, Originated in Current Fiscal Year	0	11
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	13	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	11	5
Financing Receivable, Originated Three Years before Latest Fiscal Year	3	5
Financing Receivable, Originated Four Years before Latest Fiscal Year	10	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	23	25
Total	676	537
Total consumer | Other consumer | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	78
Financing Receivable, Revolving	44	56
Financing Receivable, Originated in Current Fiscal Year	0	11
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	21
Financing Receivable, Originated Two Years before Latest Fiscal Year	7	10
Financing Receivable, Originated Three Years before Latest Fiscal Year	6	56
Financing Receivable, Originated Four Years before Latest Fiscal Year	6	10
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	36	34
Total	$ 100	$ 197