Loans, Credit Quality Indicator by Vintage Year (Details) $ in Thousands	Jun. 30, 2020 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	$ 19,445
Financing Receivable, Revolving	2,924,286
Financing Receivable, Originated in Current Fiscal Year	4,165,465
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	5,762,111
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,982,386
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,554,155
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,170,639
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	3,273,628
Total	24,832,671
Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	234
Financing Receivable, Revolving	13,531
Financing Receivable, Originated in Current Fiscal Year	23,125
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	44,999
Financing Receivable, Originated Two Years before Latest Fiscal Year	55,868
Financing Receivable, Originated Three Years before Latest Fiscal Year	3,854
Financing Receivable, Originated Four Years before Latest Fiscal Year	25,195
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	15,683
Total	182,254
Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	3,190
Financing Receivable, Revolving	2,894,381
Financing Receivable, Originated in Current Fiscal Year	4,085,744
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	5,624,245
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,845,698
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,459,878
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,101,091
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	3,160,936
Total	24,171,974
Potential Problem
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	517
Financing Receivable, Revolving	15,618
Financing Receivable, Originated in Current Fiscal Year	52,540
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	71,634
Financing Receivable, Originated Two Years before Latest Fiscal Year	72,497
Financing Receivable, Originated Three Years before Latest Fiscal Year	56,719
Financing Receivable, Originated Four Years before Latest Fiscal Year	16,619
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	21,209
Total	306,836
Nonaccrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	15,504
Financing Receivable, Revolving	757
Financing Receivable, Originated in Current Fiscal Year	4,056
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	21,232
Financing Receivable, Originated Two Years before Latest Fiscal Year	8,323
Financing Receivable, Originated Three Years before Latest Fiscal Year	33,705
Financing Receivable, Originated Four Years before Latest Fiscal Year	27,733
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	75,800
Total	171,607
Oil and Gas Portfolio Segment [Member] | Potential Problem
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	63,000
Oil and Gas Portfolio Segment [Member] | Nonaccrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	50,000
Total commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	16,599
Financing Receivable, Revolving	2,120,969
Financing Receivable, Originated in Current Fiscal Year	3,212,424
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,999,718
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,180,887
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,253,039
Financing Receivable, Originated Four Years before Latest Fiscal Year	988,922
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,021,484
Total	15,777,441
Total commercial | Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0
Financing Receivable, Revolving	12,802
Financing Receivable, Originated in Current Fiscal Year	23,125
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	44,969
Financing Receivable, Originated Two Years before Latest Fiscal Year	55,576
Financing Receivable, Originated Three Years before Latest Fiscal Year	3,829
Financing Receivable, Originated Four Years before Latest Fiscal Year	25,159
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	14,860
Total	180,320
Total commercial | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	1,170
Financing Receivable, Revolving	2,094,324
Financing Receivable, Originated in Current Fiscal Year	3,135,547
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,866,425
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,052,162
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,167,818
Financing Receivable, Originated Four Years before Latest Fiscal Year	930,746
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	954,496
Total	15,201,517
Total commercial | Potential Problem
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	517
Financing Receivable, Revolving	13,843
Financing Receivable, Originated in Current Fiscal Year	51,760
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	70,927
Financing Receivable, Originated Two Years before Latest Fiscal Year	72,292
Financing Receivable, Originated Three Years before Latest Fiscal Year	56,507
Financing Receivable, Originated Four Years before Latest Fiscal Year	16,393
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	20,035
Total	301,758
Total commercial | Nonaccrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	14,911
Financing Receivable, Revolving	0
Financing Receivable, Originated in Current Fiscal Year	1,992
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	17,397
Financing Receivable, Originated Two Years before Latest Fiscal Year	857
Financing Receivable, Originated Three Years before Latest Fiscal Year	24,884
Financing Receivable, Originated Four Years before Latest Fiscal Year	16,624
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	32,093
Total	93,846
Total commercial | PPP
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	1,012,033
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	1,012,033
Total commercial | PPP | Special Mention
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	7,409
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	7,409
Total commercial | PPP | Pass
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	985,462
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	985,462
Total commercial | PPP | Potential Problem
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	19,161
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	19,161
Total commercial | Commercial And Industrial Financing Receivable [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	15,003
Financing Receivable, Revolving	1,858,562
Financing Receivable, Originated in Current Fiscal Year	948,477
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,806,776
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,724,210
Financing Receivable, Originated Three Years before Latest Fiscal Year	674,708
Financing Receivable, Originated Four Years before Latest Fiscal Year	391,662
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	564,314
Total	7,968,709
Total commercial | Commercial And Industrial Financing Receivable [Member] | Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0
Financing Receivable, Revolving	12,802
Financing Receivable, Originated in Current Fiscal Year	379
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	23,783
Financing Receivable, Originated Two Years before Latest Fiscal Year	7,299
Financing Receivable, Originated Three Years before Latest Fiscal Year	15
Financing Receivable, Originated Four Years before Latest Fiscal Year	5,541
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	17
Total	49,836
Total commercial | Commercial And Industrial Financing Receivable [Member] | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	20
Financing Receivable, Revolving	1,832,797
Financing Receivable, Originated in Current Fiscal Year	929,266
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,759,308
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,650,024
Financing Receivable, Originated Three Years before Latest Fiscal Year	597,967
Financing Receivable, Originated Four Years before Latest Fiscal Year	361,006
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	531,995
Total	7,662,364
Total commercial | Commercial And Industrial Financing Receivable [Member] | Potential Problem
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	517
Financing Receivable, Revolving	12,963
Financing Receivable, Originated in Current Fiscal Year	17,235
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	16,544
Financing Receivable, Originated Two Years before Latest Fiscal Year	66,699
Financing Receivable, Originated Three Years before Latest Fiscal Year	52,176
Financing Receivable, Originated Four Years before Latest Fiscal Year	8,492
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,162
Total	176,270
Total commercial | Commercial And Industrial Financing Receivable [Member] | Nonaccrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	14,465
Financing Receivable, Revolving	0
Financing Receivable, Originated in Current Fiscal Year	1,597
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	7,140
Financing Receivable, Originated Two Years before Latest Fiscal Year	188
Financing Receivable, Originated Three Years before Latest Fiscal Year	24,550
Financing Receivable, Originated Four Years before Latest Fiscal Year	16,624
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	30,141
Total	80,239
Total commercial | Commercial real estate — owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	1,150
Financing Receivable, Revolving	17,973
Financing Receivable, Originated in Current Fiscal Year	97,217
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	230,960
Financing Receivable, Originated Two Years before Latest Fiscal Year	146,670
Financing Receivable, Originated Three Years before Latest Fiscal Year	124,887
Financing Receivable, Originated Four Years before Latest Fiscal Year	174,911
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	121,768
Total	914,385
Total commercial | Commercial real estate — owner occupied | Special Mention
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	2,450
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	16,317
Financing Receivable, Originated Two Years before Latest Fiscal Year	12,776
Financing Receivable, Originated Three Years before Latest Fiscal Year	128
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,439
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	5,321
Total	39,432
Total commercial | Commercial real estate — owner occupied | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	1,150
Financing Receivable, Revolving	17,897
Financing Receivable, Originated in Current Fiscal Year	94,106
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	213,234
Financing Receivable, Originated Two Years before Latest Fiscal Year	131,748
Financing Receivable, Originated Three Years before Latest Fiscal Year	121,963
Financing Receivable, Originated Four Years before Latest Fiscal Year	166,366
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	111,790
Total	857,103
Total commercial | Commercial real estate — owner occupied | Potential Problem
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0
Financing Receivable, Revolving	77
Financing Receivable, Originated in Current Fiscal Year	661
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,409
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,923
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,461
Financing Receivable, Originated Four Years before Latest Fiscal Year	6,106
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	3,281
Total	15,919
Total commercial | Commercial real estate — owner occupied | Nonaccrual
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	223
Financing Receivable, Originated Three Years before Latest Fiscal Year	335
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,374
Total	1,932
Total commercial | Commercial and business lending
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	16,153
Financing Receivable, Revolving	1,876,535
Financing Receivable, Originated in Current Fiscal Year	2,057,727
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,037,736
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,870,880
Financing Receivable, Originated Three Years before Latest Fiscal Year	799,595
Financing Receivable, Originated Four Years before Latest Fiscal Year	566,572
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	686,082
Total	9,895,127
Total commercial | Commercial and business lending | Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0
Financing Receivable, Revolving	12,802
Financing Receivable, Originated in Current Fiscal Year	10,239
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	40,100
Financing Receivable, Originated Two Years before Latest Fiscal Year	20,075
Financing Receivable, Originated Three Years before Latest Fiscal Year	143
Financing Receivable, Originated Four Years before Latest Fiscal Year	7,979
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	5,338
Total	96,677
Total commercial | Commercial and business lending | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	1,170
Financing Receivable, Revolving	1,850,694
Financing Receivable, Originated in Current Fiscal Year	2,008,834
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,972,542
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,781,772
Financing Receivable, Originated Three Years before Latest Fiscal Year	719,930
Financing Receivable, Originated Four Years before Latest Fiscal Year	527,371
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	643,786
Total	9,504,929
Total commercial | Commercial and business lending | Potential Problem
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	517
Financing Receivable, Revolving	13,040
Financing Receivable, Originated in Current Fiscal Year	37,058
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	17,953
Financing Receivable, Originated Two Years before Latest Fiscal Year	68,622
Financing Receivable, Originated Three Years before Latest Fiscal Year	54,637
Financing Receivable, Originated Four Years before Latest Fiscal Year	14,598
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	5,443
Total	211,350
Total commercial | Commercial and business lending | Nonaccrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	14,465
Financing Receivable, Revolving	0
Financing Receivable, Originated in Current Fiscal Year	1,597
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	7,140
Financing Receivable, Originated Two Years before Latest Fiscal Year	411
Financing Receivable, Originated Three Years before Latest Fiscal Year	24,884
Financing Receivable, Originated Four Years before Latest Fiscal Year	16,624
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	31,515
Total	82,171
Total commercial | Commercial real estate — investor
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	446
Financing Receivable, Revolving	176,850
Financing Receivable, Originated in Current Fiscal Year	875,014
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,151,033
Financing Receivable, Originated Two Years before Latest Fiscal Year	857,101
Financing Receivable, Originated Three Years before Latest Fiscal Year	382,098
Financing Receivable, Originated Four Years before Latest Fiscal Year	419,255
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	312,775
Total	4,174,125
Total commercial | Commercial real estate — investor | Special Mention
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	12,886
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	4,869
Financing Receivable, Originated Two Years before Latest Fiscal Year	17,098
Financing Receivable, Originated Three Years before Latest Fiscal Year	3,686
Financing Receivable, Originated Four Years before Latest Fiscal Year	17,180
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	9,509
Total	65,228
Total commercial | Commercial real estate — investor | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0
Financing Receivable, Revolving	176,047
Financing Receivable, Originated in Current Fiscal Year	847,031
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,083,145
Financing Receivable, Originated Two Years before Latest Fiscal Year	836,244
Financing Receivable, Originated Three Years before Latest Fiscal Year	378,098
Financing Receivable, Originated Four Years before Latest Fiscal Year	400,279
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	288,644
Total	4,009,488
Total commercial | Commercial real estate — investor | Potential Problem
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0
Financing Receivable, Revolving	803
Financing Receivable, Originated in Current Fiscal Year	14,703
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	52,762
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,313
Financing Receivable, Originated Three Years before Latest Fiscal Year	314
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,796
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	14,547
Total	88,237
Total commercial | Commercial real estate — investor | Nonaccrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	446
Financing Receivable, Revolving	0
Financing Receivable, Originated in Current Fiscal Year	395
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	10,256
Financing Receivable, Originated Two Years before Latest Fiscal Year	446
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	75
Total	11,172
Total commercial | Real Estate Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0
Financing Receivable, Revolving	67,584
Financing Receivable, Originated in Current Fiscal Year	279,683
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	810,949
Financing Receivable, Originated Two Years before Latest Fiscal Year	452,906
Financing Receivable, Originated Three Years before Latest Fiscal Year	71,346
Financing Receivable, Originated Four Years before Latest Fiscal Year	3,095
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	22,627
Total	1,708,189
Total commercial | Real Estate Construction | Special Mention
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	18,402
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	12
Total	18,414
Total commercial | Real Estate Construction | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0
Financing Receivable, Revolving	67,584
Financing Receivable, Originated in Current Fiscal Year	279,683
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	810,738
Financing Receivable, Originated Two Years before Latest Fiscal Year	434,146
Financing Receivable, Originated Three Years before Latest Fiscal Year	69,790
Financing Receivable, Originated Four Years before Latest Fiscal Year	3,095
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	22,066
Total	1,687,100
Total commercial | Real Estate Construction | Potential Problem
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	211
Financing Receivable, Originated Two Years before Latest Fiscal Year	358
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,557
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	45
Total	2,170
Total commercial | Real Estate Construction | Nonaccrual
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	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	503
Total	503
Total commercial | Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	446
Financing Receivable, Revolving	244,433
Financing Receivable, Originated in Current Fiscal Year	1,154,696
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,961,982
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,310,007
Financing Receivable, Originated Three Years before Latest Fiscal Year	453,444
Financing Receivable, Originated Four Years before Latest Fiscal Year	422,349
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	335,402
Total	5,882,314
Total commercial | Commercial Real Estate | Special Mention
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	12,886
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	4,869
Financing Receivable, Originated Two Years before Latest Fiscal Year	35,500
Financing Receivable, Originated Three Years before Latest Fiscal Year	3,686
Financing Receivable, Originated Four Years before Latest Fiscal Year	17,180
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	9,522
Total	83,643
Total commercial | Commercial Real Estate | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0
Financing Receivable, Revolving	243,630
Financing Receivable, Originated in Current Fiscal Year	1,126,713
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,893,883
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,270,390
Financing Receivable, Originated Three Years before Latest Fiscal Year	447,888
Financing Receivable, Originated Four Years before Latest Fiscal Year	403,374
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	310,710
Total	5,696,589
Total commercial | Commercial Real Estate | Potential Problem
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0
Financing Receivable, Revolving	803
Financing Receivable, Originated in Current Fiscal Year	14,703
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	52,973
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,670
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,870
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,796
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	14,592
Total	90,407
Total commercial | Commercial Real Estate | Nonaccrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	446
Financing Receivable, Revolving	0
Financing Receivable, Originated in Current Fiscal Year	395
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	10,256
Financing Receivable, Originated Two Years before Latest Fiscal Year	446
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	578
Total	11,675
Total consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	2,846
Financing Receivable, Revolving	803,318
Financing Receivable, Originated in Current Fiscal Year	953,041
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,762,393
Financing Receivable, Originated Two Years before Latest Fiscal Year	801,499
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,301,117
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,181,717
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,252,145
Total	9,055,230
Total consumer | Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	234
Financing Receivable, Revolving	729
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	30
Financing Receivable, Originated Two Years before Latest Fiscal Year	292
Financing Receivable, Originated Three Years before Latest Fiscal Year	24
Financing Receivable, Originated Four Years before Latest Fiscal Year	36
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	823
Total	1,934
Total consumer | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	2,020
Financing Receivable, Revolving	800,057
Financing Receivable, Originated in Current Fiscal Year	950,196
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,757,820
Financing Receivable, Originated Two Years before Latest Fiscal Year	793,537
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,292,060
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,170,346
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,206,441
Total	8,970,456
Total consumer | Potential Problem
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0
Financing Receivable, Revolving	1,775
Financing Receivable, Originated in Current Fiscal Year	780
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	707
Financing Receivable, Originated Two Years before Latest Fiscal Year	205
Financing Receivable, Originated Three Years before Latest Fiscal Year	212
Financing Receivable, Originated Four Years before Latest Fiscal Year	226
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,174
Total	5,078
Total consumer | Nonaccrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	593
Financing Receivable, Revolving	757
Financing Receivable, Originated in Current Fiscal Year	2,065
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,836
Financing Receivable, Originated Two Years before Latest Fiscal Year	7,466
Financing Receivable, Originated Three Years before Latest Fiscal Year	8,821
Financing Receivable, Originated Four Years before Latest Fiscal Year	11,110
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	43,707
Total	77,761
Total consumer | Residential mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0
Financing Receivable, Revolving	90
Financing Receivable, Originated in Current Fiscal Year	946,490
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,730,982
Financing Receivable, Originated Two Years before Latest Fiscal Year	774,348
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,282,822
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,171,880
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,026,905
Total	7,933,518
Total consumer | Residential mortgage | Special Mention
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	270
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	36
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	206
Total	511
Total consumer | Residential mortgage | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0
Financing Receivable, Revolving	90
Financing Receivable, Originated in Current Fiscal Year	943,953
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,726,616
Financing Receivable, Originated Two Years before Latest Fiscal Year	766,921
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,274,176
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,160,820
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,990,617
Total	7,863,194
Total consumer | Residential mortgage | Potential Problem
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	780
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	707
Financing Receivable, Originated Two Years before Latest Fiscal Year	205
Financing Receivable, Originated Three Years before Latest Fiscal Year	212
Financing Receivable, Originated Four Years before Latest Fiscal Year	226
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,028
Total	3,157
Total consumer | Residential mortgage | Nonaccrual
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	1,758
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,659
Financing Receivable, Originated Two Years before Latest Fiscal Year	6,953
Financing Receivable, Originated Three Years before Latest Fiscal Year	8,434
Financing Receivable, Originated Four Years before Latest Fiscal Year	10,798
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	35,055
Total	66,656
Total consumer | Home Equity Loan
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	2,824
Financing Receivable, Revolving	634,013
Financing Receivable, Originated in Current Fiscal Year	2,044
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	16,564
Financing Receivable, Originated Two Years before Latest Fiscal Year	21,541
Financing Receivable, Originated Three Years before Latest Fiscal Year	15,484
Financing Receivable, Originated Four Years before Latest Fiscal Year	7,743
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	98,282
Total	795,671
Total consumer | Home Equity Loan | Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	233
Financing Receivable, Revolving	199
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	16
Financing Receivable, Originated Three Years before Latest Fiscal Year	24
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	610
Total	849
Total consumer | Home Equity Loan | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	2,005
Financing Receivable, Revolving	631,366
Financing Receivable, Originated in Current Fiscal Year	1,746
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	16,439
Financing Receivable, Originated Two Years before Latest Fiscal Year	21,034
Financing Receivable, Originated Three Years before Latest Fiscal Year	15,073
Financing Receivable, Originated Four Years before Latest Fiscal Year	7,510
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	88,904
Total	782,073
Total consumer | Home Equity Loan | Potential Problem
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0
Financing Receivable, Revolving	1,775
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	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	146
Total	1,921
Total consumer | Home Equity Loan | Nonaccrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	586
Financing Receivable, Revolving	673
Financing Receivable, Originated in Current Fiscal Year	297
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	124
Financing Receivable, Originated Two Years before Latest Fiscal Year	491
Financing Receivable, Originated Three Years before Latest Fiscal Year	387
Financing Receivable, Originated Four Years before Latest Fiscal Year	233
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	8,623
Total	10,829
Total consumer | Other consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	22
Financing Receivable, Revolving	169,215
Financing Receivable, Originated in Current Fiscal Year	4,507
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	14,847
Financing Receivable, Originated Two Years before Latest Fiscal Year	5,610
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,811
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,094
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	126,957
Total	326,040
Total consumer | Other consumer | Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	1
Financing Receivable, Revolving	530
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	30
Financing Receivable, Originated Two Years before Latest Fiscal Year	6
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	7
Total	574
Total consumer | Other consumer | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	15
Financing Receivable, Revolving	168,601
Financing Receivable, Originated in Current Fiscal Year	4,497
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	14,764
Financing Receivable, Originated Two Years before Latest Fiscal Year	5,581
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,811
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,015
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	126,920
Total	325,190
Total consumer | Other consumer | Nonaccrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	7
Financing Receivable, Revolving	84
Financing Receivable, Originated in Current Fiscal Year	10
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	53
Financing Receivable, Originated Two Years before Latest Fiscal Year	22
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	78
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	30
Total	$ 276