Loans, Credit Quality Indicator by Vintage Year (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	$ 17,329	$ 53,246
Financing Receivable, Revolving	3,026,483	2,915,297
Financing Receivable, Originated in Current Fiscal Year	2,588,392	8,854,510
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	8,836,728	7,341,574
Financing Receivable, Originated Two Years before Latest Fiscal Year	6,880,278	3,469,992
Financing Receivable, Originated Three Years before Latest Fiscal Year	3,085,363	2,201,004
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,870,900	1,082,280
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	3,560,760	2,934,912
Total	29,848,904	28,799,569
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	4,015
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	5,182
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	2,597
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	5,498
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	20
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	39
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	3,006
Charge offs	20,356
Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	5,254	47,152
Financing Receivable, Revolving	2,890,525	2,795,551
Financing Receivable, Originated in Current Fiscal Year	2,539,079	8,711,468
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	8,679,015	7,226,734
Financing Receivable, Originated Two Years before Latest Fiscal Year	6,696,090	3,377,725
Financing Receivable, Originated Three Years before Latest Fiscal Year	3,014,119	2,101,861
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,853,703	1,047,522
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	3,453,575	2,834,303
Total	29,126,106	28,095,164
Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	357	52
Financing Receivable, Revolving	46,162	93,801
Financing Receivable, Originated in Current Fiscal Year	15,497	66,443
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	89,341	48,159
Financing Receivable, Originated Two Years before Latest Fiscal Year	35,500	20,772
Financing Receivable, Originated Three Years before Latest Fiscal Year	22,113	43,983
Financing Receivable, Originated Four Years before Latest Fiscal Year	8,276	9,778
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	31,458	43,350
Total	248,348	326,286
Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	655	447
Financing Receivable, Revolving	89,637	25,889
Financing Receivable, Originated in Current Fiscal Year	28,492	59,240
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	42,619	36,709
Financing Receivable, Originated Two Years before Latest Fiscal Year	114,872	56,016
Financing Receivable, Originated Three Years before Latest Fiscal Year	32,415	51,043
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,180	19,637
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	32,958	18,118
Total	343,173	266,651
Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	11,063	5,595
Financing Receivable, Revolving	159	56
Financing Receivable, Originated in Current Fiscal Year	5,324	17,360
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	25,753	29,972
Financing Receivable, Originated Two Years before Latest Fiscal Year	33,816	15,479
Financing Receivable, Originated Three Years before Latest Fiscal Year	16,717	4,116
Financing Receivable, Originated Four Years before Latest Fiscal Year	6,741	5,343
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	42,769	39,141
Total	131,278	111,467
Total commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	11,657	44,208
Financing Receivable, Revolving	2,333,596	2,206,480
Financing Receivable, Originated in Current Fiscal Year	1,793,040	6,122,430
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	6,045,921	5,034,805
Financing Receivable, Originated Two Years before Latest Fiscal Year	4,546,470	1,741,955
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,421,101	1,370,245
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,090,030	698,550
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,205,553	812,278
Total	18,435,711	17,986,742
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	1,789
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	5,158
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	249
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	5,140
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	2,418
Charge offs	14,755
Total commercial | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	375	39,835
Financing Receivable, Revolving	2,198,437	2,087,396
Financing Receivable, Originated in Current Fiscal Year	1,744,679	5,990,879
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	5,898,823	4,924,743
Financing Receivable, Originated Two Years before Latest Fiscal Year	4,368,817	1,656,149
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,358,348	1,275,996
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,080,154	669,213
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,141,709	750,399
Total	17,790,967	17,354,774
Total commercial | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	57	0
Financing Receivable, Revolving	45,522	93,209
Financing Receivable, Originated in Current Fiscal Year	15,316	65,379
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	87,983	47,756
Financing Receivable, Originated Two Years before Latest Fiscal Year	35,136	20,671
Financing Receivable, Originated Three Years before Latest Fiscal Year	21,981	43,978
Financing Receivable, Originated Four Years before Latest Fiscal Year	8,276	9,732
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	30,700	42,952
Total	244,914	323,677
Total commercial | Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	642	447
Financing Receivable, Revolving	89,637	25,874
Financing Receivable, Originated in Current Fiscal Year	28,370	58,785
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	42,252	36,638
Financing Receivable, Originated Two Years before Latest Fiscal Year	114,259	56,016
Financing Receivable, Originated Three Years before Latest Fiscal Year	32,415	50,271
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,600	19,606
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	32,753	17,287
Total	341,286	264,476
Total commercial | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	10,583	3,926
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	4,675	7,387
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	16,863	25,668
Financing Receivable, Originated Two Years before Latest Fiscal Year	28,258	9,119
Financing Receivable, Originated Three Years before Latest Fiscal Year	8,357	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	392	1,640
Total	58,544	43,814
Total commercial | Commercial and Industrial Sector
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	11,657	5,796
Financing Receivable, Revolving	2,150,731	2,056,535
Financing Receivable, Originated in Current Fiscal Year	898,447	3,295,567
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,174,361	2,394,809
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,207,845	598,839
Financing Receivable, Originated Three Years before Latest Fiscal Year	485,088	611,289
Financing Receivable, Originated Four Years before Latest Fiscal Year	489,991	330,879
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	649,023	471,535
Total	10,055,487	9,759,454
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	1,789
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	5,158
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	249
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	5,140
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	14,489
Total commercial | Commercial and Industrial Sector | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	375	1,423
Financing Receivable, Revolving	2,016,151	1,938,777
Financing Receivable, Originated in Current Fiscal Year	894,287	3,245,546
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,101,942	2,367,008
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,118,259	567,833
Financing Receivable, Originated Three Years before Latest Fiscal Year	450,305	573,120
Financing Receivable, Originated Four Years before Latest Fiscal Year	489,900	330,642
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	617,543	432,906
Total	9,688,387	9,455,833
Total commercial | Commercial and Industrial Sector | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	57	0
Financing Receivable, Revolving	44,943	93,209
Financing Receivable, Originated in Current Fiscal Year	57	3,411
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	35,706	23,607
Financing Receivable, Originated Two Years before Latest Fiscal Year	9,319	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	6,240	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	19
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	30,700	32,497
Total	126,964	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	642	447
Financing Receivable, Revolving	89,637	24,549
Financing Receivable, Originated in Current Fiscal Year	873	41,400
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	19,850	4,193
Financing Receivable, Originated Two Years before Latest Fiscal Year	73,809	21,887
Financing Receivable, Originated Three Years before Latest Fiscal Year	20,187	38,169
Financing Receivable, Originated Four Years before Latest Fiscal Year	91	218
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	781	6,133
Total	205,228	136,549
Total commercial | Commercial and Industrial Sector | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	10,583	3,926
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	3,230	5,210
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	16,863	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	6,457	9,119
Financing Receivable, Originated Three Years before Latest Fiscal Year	8,357	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	34,907	14,329
Total commercial | Commercial real estate — owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	20,272	13,772
Financing Receivable, Originated in Current Fiscal Year	136,342	212,883
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	210,600	236,769
Financing Receivable, Originated Two Years before Latest Fiscal Year	239,873	170,624
Financing Receivable, Originated Three Years before Latest Fiscal Year	154,436	172,630
Financing Receivable, Originated Four Years before Latest Fiscal Year	156,482	83,570
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	140,231	101,475
Total	1,058,237	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	19,693	12,447
Financing Receivable, Originated in Current Fiscal Year	132,242	211,645
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	209,736	225,627
Financing Receivable, Originated Two Years before Latest Fiscal Year	230,821	163,965
Financing Receivable, Originated Three Years before Latest Fiscal Year	147,000	160,370
Financing Receivable, Originated Four Years before Latest Fiscal Year	147,706	73,487
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	127,909	97,420
Total	1,015,108	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	579	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	3,434	1,491
Financing Receivable, Originated Four Years before Latest Fiscal Year	8,276	9,713
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Total	12,289	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	2,656	1,238
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	864	11,141
Financing Receivable, Originated Two Years before Latest Fiscal Year	9,052	5,523
Financing Receivable, Originated Three Years before Latest Fiscal Year	4,002	10,769
Financing Receivable, Originated Four Years before Latest Fiscal Year	500	370
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	12,322	4,055
Total	29,396	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	0
Financing Receivable, Revolving	0
Financing Receivable, Originated in Current Fiscal Year	1,444
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
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	1,444
Total commercial | Commercial and business lending
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	11,657	5,796
Financing Receivable, Revolving	2,171,004	2,070,307
Financing Receivable, Originated in Current Fiscal Year	1,034,789	3,508,450
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,384,961	2,631,578
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,447,717	769,463
Financing Receivable, Originated Three Years before Latest Fiscal Year	639,524	783,919
Financing Receivable, Originated Four Years before Latest Fiscal Year	646,474	414,449
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	789,254	573,010
Total	11,113,724	10,751,176
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	1,789
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	5,158
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	249
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	5,140
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	14,489
Total commercial | Commercial and business lending | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	375	1,423
Financing Receivable, Revolving	2,035,845	1,951,224
Financing Receivable, Originated in Current Fiscal Year	1,026,529	3,457,191
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,311,678	2,592,636
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,349,081	731,798
Financing Receivable, Originated Three Years before Latest Fiscal Year	597,305	733,490
Financing Receivable, Originated Four Years before Latest Fiscal Year	637,606	404,129
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	745,452	530,326
Total	10,703,495	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	57	0
Financing Receivable, Revolving	45,522	93,209
Financing Receivable, Originated in Current Fiscal Year	57	3,411
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	35,706	23,607
Financing Receivable, Originated Two Years before Latest Fiscal Year	9,319	1,136
Financing Receivable, Originated Three Years before Latest Fiscal Year	9,673	1,491
Financing Receivable, Originated Four Years before Latest Fiscal Year	8,276	9,732
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	30,700	32,497
Total	139,253	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	642	447
Financing Receivable, Revolving	89,637	25,874
Financing Receivable, Originated in Current Fiscal Year	3,528	42,638
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	20,714	15,335
Financing Receivable, Originated Two Years before Latest Fiscal Year	82,861	27,410
Financing Receivable, Originated Three Years before Latest Fiscal Year	24,190	48,938
Financing Receivable, Originated Four Years before Latest Fiscal Year	592	589
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	13,103	10,188
Total	234,624	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	10,583	3,926
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	4,675	5,210
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	16,863	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	6,457	9,119
Financing Receivable, Originated Three Years before Latest Fiscal Year	8,357	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	36,352	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	131,996	106,280
Financing Receivable, Originated in Current Fiscal Year	650,976	1,713,387
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,623,135	1,490,120
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,418,092	718,117
Financing Receivable, Originated Three Years before Latest Fiscal Year	645,919	541,177
Financing Receivable, Originated Four Years before Latest Fiscal Year	436,609	281,875
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	406,200	229,387
Total	5,312,928	5,080,344
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	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	242
Charge offs	242
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	131,996	106,280
Financing Receivable, Originated in Current Fiscal Year	610,875	1,633,094
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,549,321	1,419,000
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,339,075	683,121
Financing Receivable, Originated Three Years before Latest Fiscal Year	637,693	530,444
Financing Receivable, Originated Four Years before Latest Fiscal Year	435,601	262,858
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	386,283	210,299
Total	5,090,844	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	15,259	61,968
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	52,277	24,149
Financing Receivable, Originated Two Years before Latest Fiscal Year	25,817	7,361
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	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	93,353	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	24,842	16,147
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	21,538	21,303
Financing Receivable, Originated Two Years before Latest Fiscal Year	31,398	27,635
Financing Receivable, Originated Three Years before Latest Fiscal Year	8,225	1,333
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,008	19,017
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	19,650	7,099
Total	106,662	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	21,801	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	22,068	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	30,596	29,892
Financing Receivable, Originated in Current Fiscal Year	107,275	900,593
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,037,825	913,107
Financing Receivable, Originated Two Years before Latest Fiscal Year	680,661	254,374
Financing Receivable, Originated Three Years before Latest Fiscal Year	135,658	45,149
Financing Receivable, Originated Four Years before Latest Fiscal Year	6,947	2,226
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	10,099	9,880
Total	2,009,060	2,155,222
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	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	25
Charge offs	25
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	30,596	29,892
Financing Receivable, Originated in Current Fiscal Year	107,275	900,593
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,037,825	913,107
Financing Receivable, Originated Two Years before Latest Fiscal Year	680,661	241,230
Financing Receivable, Originated Three Years before Latest Fiscal Year	123,350	12,062
Financing Receivable, Originated Four Years before Latest Fiscal Year	6,947	2,226
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	9,974	9,775
Total	1,996,627	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	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Total	12,308	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	125	105
Total	125	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	162,592	136,173
Financing Receivable, Originated in Current Fiscal Year	758,251	2,613,980
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,660,960	2,403,227
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,098,753	972,492
Financing Receivable, Originated Three Years before Latest Fiscal Year	781,577	586,326
Financing Receivable, Originated Four Years before Latest Fiscal Year	443,556	284,101
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	416,299	239,267
Total	7,321,988	7,235,565
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	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	266
Charge offs	266
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	162,592	136,173
Financing Receivable, Originated in Current Fiscal Year	718,150	2,533,687
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,587,145	2,332,107
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,019,736	924,351
Financing Receivable, Originated Three Years before Latest Fiscal Year	761,044	542,505
Financing Receivable, Originated Four Years before Latest Fiscal Year	442,548	265,083
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	396,257	220,073
Total	7,087,472	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	15,259	61,968
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	52,277	24,149
Financing Receivable, Originated Two Years before Latest Fiscal Year	25,817	19,535
Financing Receivable, Originated Three Years before Latest Fiscal Year	12,308	42,487
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	105,661	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	24,842	16,147
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	21,538	21,303
Financing Receivable, Originated Two Years before Latest Fiscal Year	31,398	28,605
Financing Receivable, Originated Three Years before Latest Fiscal Year	8,225	1,333
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,008	19,017
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	19,650	7,099
Total	106,662	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	21,801	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	392	1,640
Total	22,193	29,485
Total consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	5,673	9,038
Financing Receivable, Revolving	692,887	708,817
Financing Receivable, Originated in Current Fiscal Year	795,352	2,732,080
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,790,806	2,306,769
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,333,808	1,728,037
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,664,262	830,759
Financing Receivable, Originated Four Years before Latest Fiscal Year	780,870	383,731
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,355,207	2,122,635
Total	11,413,193	10,812,828
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	2,226
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	24
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	2,348
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	358
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	20
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	39
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	588
Charge offs	5,601
Total consumer | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	4,879	7,318
Financing Receivable, Revolving	692,088	708,154
Financing Receivable, Originated in Current Fiscal Year	794,400	2,720,589
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,780,192	2,301,991
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,327,273	1,721,576
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,655,771	825,866
Financing Receivable, Originated Four Years before Latest Fiscal Year	773,549	378,310
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,311,866	2,083,904
Total	11,335,139	10,740,390
Total consumer | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	301	52
Financing Receivable, Revolving	640	592
Financing Receivable, Originated in Current Fiscal Year	181	1,063
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,358	403
Financing Receivable, Originated Two Years before Latest Fiscal Year	364	101
Financing Receivable, Originated Three Years before Latest Fiscal Year	131	5
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	47
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	758	398
Total	3,434	2,609
Total consumer | Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	13	0
Financing Receivable, Revolving	0	15
Financing Receivable, Originated in Current Fiscal Year	122	455
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	367	71
Financing Receivable, Originated Two Years before Latest Fiscal Year	613	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	772
Financing Receivable, Originated Four Years before Latest Fiscal Year	580	31
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	205	831
Total	1,886	2,175
Total consumer | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	480	1,668
Financing Receivable, Revolving	159	56
Financing Receivable, Originated in Current Fiscal Year	649	9,973
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	8,890	4,304
Financing Receivable, Originated Two Years before Latest Fiscal Year	5,557	6,360
Financing Receivable, Originated Three Years before Latest Fiscal Year	8,360	4,116
Financing Receivable, Originated Four Years before Latest Fiscal Year	6,741	5,343
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	42,378	37,501
Total	72,733	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	225,216	1,419,527
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,635,393	2,188,332
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,232,027	1,722,979
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,659,856	821,645
Financing Receivable, Originated Four Years before Latest Fiscal Year	773,686	375,768
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,220,166	1,983,299
Total	8,746,345	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	128
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	22
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	7
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	410
Charge offs	574
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	224,502	1,410,566
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,629,017	2,184,125
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,226,398	1,716,663
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,651,621	817,164
Financing Receivable, Originated Four Years before Latest Fiscal Year	766,715	370,724
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,184,280	1,951,406
Total	8,682,533	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	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	284
Financing Receivable, Originated Two Years before Latest Fiscal Year	278	96
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	170	63
Total	448	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	109	455
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	173	71
Financing Receivable, Originated Two Years before Latest Fiscal Year	613	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	738
Financing Receivable, Originated Four Years before Latest Fiscal Year	547	29
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	205	685
Total	1,646	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	605	8,506
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	6,204	3,851
Financing Receivable, Originated Two Years before Latest Fiscal Year	4,738	6,219
Financing Receivable, Originated Three Years before Latest Fiscal Year	8,236	3,744
Financing Receivable, Originated Four Years before Latest Fiscal Year	6,424	5,014
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	35,511	31,145
Total	61,718	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	565,808	1,273,406
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,119,445	106,551
Financing Receivable, Originated Two Years before Latest Fiscal Year	91,405	333
Financing Receivable, Originated Three Years before Latest Fiscal Year	240	1,276
Financing Receivable, Originated Four Years before Latest Fiscal Year	787	446
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	289	61
Total	1,777,974	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	24
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	2,048
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	262
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	2,335
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	565,583	1,271,205
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,115,791	106,102
Financing Receivable, Originated Two Years before Latest Fiscal Year	90,632	333
Financing Receivable, Originated Three Years before Latest Fiscal Year	240	1,267
Financing Receivable, Originated Four Years before Latest Fiscal Year	778	446
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	289	61
Total	1,773,314	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	181	1,052
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,330	118
Financing Receivable, Originated Two Years before Latest Fiscal Year	84	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	1,596	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	44	1,149
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,323	331
Financing Receivable, Originated Two Years before Latest Fiscal Year	689	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	3,065	1,490
Total consumer | Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	5,426	8,891
Financing Receivable, Revolving	504,833	508,329
Financing Receivable, Originated in Current Fiscal Year	377	31,695
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	31,234	6,610
Financing Receivable, Originated Two Years before Latest Fiscal Year	6,925	2,243
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,438	6,538
Financing Receivable, Originated Four Years before Latest Fiscal Year	5,680	7,333
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	64,020	61,605
Total	615,506	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	108
Charge offs	186
Total consumer | Home equity | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	4,681	7,254
Financing Receivable, Revolving	504,626	508,212
Financing Receivable, Originated in Current Fiscal Year	365	31,389
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	30,687	6,508
Financing Receivable, Originated Two Years before Latest Fiscal Year	6,819	2,112
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,220	6,197
Financing Receivable, Originated Four Years before Latest Fiscal Year	5,351	6,966
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	56,666	54,827
Total	606,734	616,211
Total consumer | Home equity | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	276	47
Financing Receivable, Revolving	94	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	99	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	47
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	552	310
Total	744	458
Total consumer | Home equity | Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	13	0
Financing Receivable, Revolving	0	15
Financing Receivable, Originated in Current Fiscal Year	13	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	194	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	240	197
Total consumer | Home equity | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	457	1,590
Financing Receivable, Revolving	113	0
Financing Receivable, Originated in Current Fiscal Year	0	306
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	353	102
Financing Receivable, Originated Two Years before Latest Fiscal Year	106	131
Financing Receivable, Originated Three Years before Latest Fiscal Year	119	307
Financing Receivable, Originated Four Years before Latest Fiscal Year	295	319
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	6,802	6,322
Total	7,788	7,487
Total consumer | Other consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	246	147
Financing Receivable, Revolving	188,055	200,488
Financing Receivable, Originated in Current Fiscal Year	3,950	7,452
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	4,734	5,276
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,451	2,482
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,729	1,300
Financing Receivable, Originated Four Years before Latest Fiscal Year	717	184
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	70,732	77,670
Total	273,367	294,851
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	2,226
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	129
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	60
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	12
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	10
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	70
Charge offs	2,506
Total consumer | Other consumer | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	198	64
Financing Receivable, Revolving	187,462	199,942
Financing Receivable, Originated in Current Fiscal Year	3,950	7,429
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	4,696	5,256
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,424	2,468
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,690	1,238
Financing Receivable, Originated Four Years before Latest Fiscal Year	704	174
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	70,631	77,611
Total	272,559	294,117
Total consumer | Other consumer | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	25	6
Financing Receivable, Revolving	547	490
Financing Receivable, Originated in Current Fiscal Year	0	11
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	28	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	2	5
Financing Receivable, Originated Three Years before Latest Fiscal Year	33	5
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	36	25
Total	646	537
Total consumer | Other consumer | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	23	78
Financing Receivable, Revolving	46	56
Financing Receivable, Originated in Current Fiscal Year	0	11
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	10	21
Financing Receivable, Originated Two Years before Latest Fiscal Year	25	10
Financing Receivable, Originated Three Years before Latest Fiscal Year	6	56
Financing Receivable, Originated Four Years before Latest Fiscal Year	12	10
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	64	34
Total	$ 163	$ 197