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Loans and the Allowance for Credit Losses - Summary of Amortized Cost Basis Loan Balances by Year of Origination and Credit Quality Indicator (Detail) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | $ 10,702,728 | $ 9,733,478
30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 11,222 | 14,755
60-89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 6,621 | 14,005
90 Days or More Past Due [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 30,986 | 31,235
Home Equity [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2022 | 10,798 | 10,263
Amortized Cost Basis by Origination Year 2021 | 1,535 | 1,007
Amortized Cost Basis by Origination Year 2020 | 1,885 | 945
Amortized Cost Basis by Origination Year 2019 | 1,984 | 634
Amortized Cost Basis by Origination Year 2018 | 1,467 | 1,038
Amortized Cost Basis by Origination Year, Prior to 2017 | 29,251 | 21,509
Revolving Loans | 646,706 | 568,725
Revolving Loans Converted to Term | 1,439 | 1,561
Total loans | 695,065 | 605,682
Home Equity [Member] | Current [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2022 | 10,718 | 10,076
Amortized Cost Basis by Origination Year 2021 | 1,459 | 835
Amortized Cost Basis by Origination Year 2020 | 1,133 | 649
Amortized Cost Basis by Origination Year 2019 | 1,774 | 379
Amortized Cost Basis by Origination Year 2018 | 1,088 | 566
Amortized Cost Basis by Origination Year, Prior to 2017 | 25,203 | 18,064
Revolving Loans | 644,430 | 567,478
Revolving Loans Converted to Term | 957 | 1,142
Total loans | 686,762 | 599,189
Home Equity [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2022 | 80 |
Amortized Cost Basis by Origination Year 2021 | 61 | 84
Amortized Cost Basis by Origination Year 2020 | 180 | 45
Amortized Cost Basis by Origination Year 2019 | 67 | 128
Amortized Cost Basis by Origination Year 2018 | 34 | 50
Amortized Cost Basis by Origination Year, Prior to 2017 | 1,165 | 628
Revolving Loans | 2,260 | 1,247
Revolving Loans Converted to Term | 38 | 58
Total loans | 3,885 | 2,240
Home Equity [Member] | 60-89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2021 | 15 |
Amortized Cost Basis by Origination Year 2020 |  | 132
Amortized Cost Basis by Origination Year 2019 | 50 | 15
Amortized Cost Basis by Origination Year 2018 | 88 | 188
Amortized Cost Basis by Origination Year, Prior to 2017 | 458 | 267
Revolving Loans Converted to Term | 10 |
Total loans | 621 | 602
Home Equity [Member] | 90 Days or More Past Due [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2022 |  | 187
Amortized Cost Basis by Origination Year 2021 |  | 88
Amortized Cost Basis by Origination Year 2020 | 572 | 119
Amortized Cost Basis by Origination Year 2019 | 93 | 112
Amortized Cost Basis by Origination Year 2018 | 257 | 234
Amortized Cost Basis by Origination Year, Prior to 2017 | 2,425 | 2,550
Revolving Loans | 16 |
Revolving Loans Converted to Term | 434 | 361
Total loans | 3,797 | 3,651
Commercial Real Estate [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 6,061,344 | 5,538,968
Commercial Real Estate [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 2,147 | 6,377
Commercial Real Estate [Member] | 60-89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 1,241 | 7,728
Commercial Real Estate [Member] | 90 Days or More Past Due [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 16,378 | 10,080
Residential Real Estate [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2022 | 541,659 | 602,867
Amortized Cost Basis by Origination Year 2021 | 557,370 | 293,417
Amortized Cost Basis by Origination Year 2020 | 211,845 | 117,042
Amortized Cost Basis by Origination Year 2019 | 97,510 | 71,681
Amortized Cost Basis by Origination Year 2018 | 52,254 | 57,827
Amortized Cost Basis by Origination Year, Prior to 2017 | 489,164 | 548,562
Revolving Loans Converted to Term | 190,782 | 29,982
Total loans | 2,140,584 | 1,721,378
Residential Real Estate [Member] | Current [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2022 | 541,659 | 599,244
Amortized Cost Basis by Origination Year 2021 | 556,928 | 292,653
Amortized Cost Basis by Origination Year 2020 | 211,496 | 116,147
Amortized Cost Basis by Origination Year 2019 | 97,160 | 71,253
Amortized Cost Basis by Origination Year 2018 | 52,135 | 56,917
Amortized Cost Basis by Origination Year, Prior to 2017 | 478,977 | 536,444
Revolving Loans Converted to Term | 190,740 | 29,929
Total loans | 2,129,095 | 1,702,587
Residential Real Estate [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2022 |  | 1,127
Amortized Cost Basis by Origination Year 2019 |  | 69
Amortized Cost Basis by Origination Year 2018 |  | 105
Amortized Cost Basis by Origination Year, Prior to 2017 | 853 | 1,030
Total loans | 853 | 2,331
Residential Real Estate [Member] | 60-89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2022 |  | 563
Amortized Cost Basis by Origination Year 2021 | 442 | 91
Amortized Cost Basis by Origination Year 2020 | 349 |
Amortized Cost Basis by Origination Year 2019 | 65 | 271
Amortized Cost Basis by Origination Year 2018 |  | 43
Amortized Cost Basis by Origination Year, Prior to 2017 | 2,680 | 2,286
Total loans | 3,536 | 3,254
Residential Real Estate [Member] | 90 Days or More Past Due [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2022 |  | 1,933
Amortized Cost Basis by Origination Year 2021 |  | 673
Amortized Cost Basis by Origination Year 2020 |  | 895
Amortized Cost Basis by Origination Year 2019 | 285 | 88
Amortized Cost Basis by Origination Year 2018 | 119 | 762
Amortized Cost Basis by Origination Year, Prior to 2017 | 6,654 | 8,802
Revolving Loans Converted to Term | 42 | 53
Total loans | 7,100 | 13,206
Consumer [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2022 | 86,164 | 61,870
Amortized Cost Basis by Origination Year 2021 | 37,561 | 44,757
Amortized Cost Basis by Origination Year 2020 | 25,722 | 50,835
Amortized Cost Basis by Origination Year 2019 | 25,773 | 19,509
Amortized Cost Basis by Origination Year 2018 | 8,617 | 11,203
Amortized Cost Basis by Origination Year, Prior to 2017 | 16,690 | 33,135
Revolving Loans | 25,786 | 55,794
Revolving Loans Converted to Term | 27 | 27
Total loans | 226,340 | 277,130
Consumer [Member] | Current [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2022 | 84,817 | 60,907
Amortized Cost Basis by Origination Year 2021 | 36,123 | 43,871
Amortized Cost Basis by Origination Year 2020 | 25,071 | 50,317
Amortized Cost Basis by Origination Year 2019 | 25,535 | 19,289
Amortized Cost Basis by Origination Year 2018 | 8,488 | 11,084
Amortized Cost Basis by Origination Year, Prior to 2017 | 16,337 | 32,343
Revolving Loans | 25,755 | 55,739
Revolving Loans Converted to Term | 27 | 27
Total loans | 222,153 | 273,577
Consumer [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2022 | 980 | 435
Amortized Cost Basis by Origination Year 2021 | 937 | 370
Amortized Cost Basis by Origination Year 2020 | 488 | 214
Amortized Cost Basis by Origination Year 2019 | 159 | 136
Amortized Cost Basis by Origination Year 2018 | 98 | 85
Amortized Cost Basis by Origination Year, Prior to 2017 | 217 | 241
Revolving Loans |  | 51
Total loans | 2,910 | 1,532
Consumer [Member] | 60-89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2022 | 184 | 413
Amortized Cost Basis by Origination Year 2021 | 293 | 375
Amortized Cost Basis by Origination Year 2020 | 94 | 82
Amortized Cost Basis by Origination Year 2019 | 47 | 19
Amortized Cost Basis by Origination Year 2018 | 29 | 33
Amortized Cost Basis by Origination Year, Prior to 2017 | 57 | 286
Total loans | 704 | 1,208
Consumer [Member] | 90 Days or More Past Due [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2022 | 183 | 115
Amortized Cost Basis by Origination Year 2021 | 208 | 141
Amortized Cost Basis by Origination Year 2020 | 69 | 222
Amortized Cost Basis by Origination Year 2019 | 32 | 65
Amortized Cost Basis by Origination Year 2018 | 2 | 1
Amortized Cost Basis by Origination Year, Prior to 2017 | 79 | 265
Revolving Loans |  | 4
Total loans | 573 | 813
Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2022 | 160,328 | 135,264
Amortized Cost Basis by Origination Year 2021 | 136,396 | 223,698
Amortized Cost Basis by Origination Year 2020 | 144,172 | 198,974
Amortized Cost Basis by Origination Year 2019 | 155,141 | 117,190
Amortized Cost Basis by Origination Year 2018 | 61,847 | 27,186
Amortized Cost Basis by Origination Year, Prior to 2017 | 51,536 | 31,195
Revolving Loans | 117,237 | 35,915
Revolving Loans Converted to Term | 117,230 | 64,458
Total loans | 943,887 | 833,880
Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member] | 60-89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 910 |
Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member] | 90 Days or More Past Due [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 741 | 125
Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2022 | 159,769 | 135,179
Amortized Cost Basis by Origination Year 2021 | 136,131 | 217,389
Amortized Cost Basis by Origination Year 2020 | 138,171 | 198,974
Amortized Cost Basis by Origination Year 2019 | 155,141 | 117,157
Amortized Cost Basis by Origination Year 2018 | 61,823 | 27,186
Amortized Cost Basis by Origination Year, Prior to 2017 | 51,381 | 29,696
Revolving Loans | 117,237 | 35,059
Revolving Loans Converted to Term | 92,151 | 62,676
Total loans | 911,804 | 823,316
Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member] | Criticized [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2022 | 559 | 85
Amortized Cost Basis by Origination Year 2021 | 265 | 6,236
Amortized Cost Basis by Origination Year 2020 |  |
Amortized Cost Basis by Origination Year 2019 |  | 33
Amortized Cost Basis by Origination Year 2018 | 24 |
Amortized Cost Basis by Origination Year, Prior to 2017 | 31 | 219
Revolving Loans |  | 856
Revolving Loans Converted to Term | 450 | 526
Total loans | 1,329 | 7,955
Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member] | Classified - substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2021 |  | 73
Amortized Cost Basis by Origination Year 2020 | 6,001 |
Amortized Cost Basis by Origination Year 2018 |  |
Amortized Cost Basis by Origination Year, Prior to 2017 | 124 | 1,280
Revolving Loans Converted to Term | 24,629 | 1,256
Total loans | 30,754 | 2,609
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2022 | 1,093,538 | 730,807
Amortized Cost Basis by Origination Year 2021 | 621,217 | 678,737
Amortized Cost Basis by Origination Year 2020 | 616,815 | 647,388
Amortized Cost Basis by Origination Year 2019 | 551,152 | 427,116
Amortized Cost Basis by Origination Year 2018 | 395,192 | 429,741
Amortized Cost Basis by Origination Year, Prior to 2017 | 1,666,522 | 1,688,629
Revolving Loans | 73,427 | 60,381
Revolving Loans Converted to Term | 99,594 | 42,289
Total loans | 5,117,457 | 4,705,088
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 2,147 | 6,377
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member] | 60-89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 331 | 7,728
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member] | 90 Days or More Past Due [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 15,637 | 9,955
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2022 | 1,082,984 | 713,697
Amortized Cost Basis by Origination Year 2021 | 620,205 | 660,856
Amortized Cost Basis by Origination Year 2020 | 613,663 | 589,674
Amortized Cost Basis by Origination Year 2019 | 528,004 | 405,689
Amortized Cost Basis by Origination Year 2018 | 371,880 | 404,241
Amortized Cost Basis by Origination Year, Prior to 2017 | 1,551,478 | 1,539,275
Revolving Loans | 72,327 | 58,933
Revolving Loans Converted to Term | 99,594 | 28,507
Total loans | 4,940,135 | 4,400,872
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member] | Criticized [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2022 | 10,554 | 7,755
Amortized Cost Basis by Origination Year 2021 | 354 | 15,195
Amortized Cost Basis by Origination Year 2020 | 2,877 | 52,859
Amortized Cost Basis by Origination Year 2019 | 7,659 | 17,697
Amortized Cost Basis by Origination Year 2018 | 13,551 | 14,490
Amortized Cost Basis by Origination Year, Prior to 2017 | 85,332 | 99,687
Revolving Loans | 1,066 | 1,414
Revolving Loans Converted to Term |  | 13,733
Total loans | 121,393 | 222,830
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member] | Classified - substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2022 |  | 9,355
Amortized Cost Basis by Origination Year 2021 | 658 | 2,686
Amortized Cost Basis by Origination Year 2020 | 275 | 4,855
Amortized Cost Basis by Origination Year 2019 | 15,489 | 3,730
Amortized Cost Basis by Origination Year 2018 | 9,761 | 11,010
Amortized Cost Basis by Origination Year, Prior to 2017 | 29,712 | 49,667
Revolving Loans | 34 | 34
Revolving Loans Converted to Term |  | 49
Total loans | 55,929 | 81,386
Commercial and Industrial [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2022 | 281,520 | 407,219
Amortized Cost Basis by Origination Year 2021 | 189,206 | 160,665
Amortized Cost Basis by Origination Year 2020 | 118,136 | 118,630
Amortized Cost Basis by Origination Year 2019 | 82,577 | 139,470
Amortized Cost Basis by Origination Year 2018 | 104,021 | 92,833
Amortized Cost Basis by Origination Year, Prior to 2017 | 237,440 | 226,211
Revolving Loans | 534,745 | 418,901
Revolving Loans Converted to Term | 31,750 | 26,391
Total loans | 1,579,395 | 1,590,320
Commercial and Industrial [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 1,427 | 2,275
Commercial and Industrial [Member] | 60-89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 519 | 1,213
Commercial and Industrial [Member] | 90 Days or More Past Due [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 3,138 | 3,485
Commercial and Industrial [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2022 | 280,510 | 406,495
Amortized Cost Basis by Origination Year 2021 | 184,805 | 159,878
Amortized Cost Basis by Origination Year 2020 | 116,890 | 99,472
Amortized Cost Basis by Origination Year 2019 | 72,142 | 136,146
Amortized Cost Basis by Origination Year 2018 | 103,660 | 89,049
Amortized Cost Basis by Origination Year, Prior to 2017 | 232,062 | 223,514
Revolving Loans | 526,025 | 409,789
Revolving Loans Converted to Term | 22,206 | 16,226
Total loans | 1,538,300 | 1,540,569
Commercial and Industrial [Member] | Criticized [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2022 | 917 | 590
Amortized Cost Basis by Origination Year 2021 | 1,192 | 551
Amortized Cost Basis by Origination Year 2020 | 270 | 693
Amortized Cost Basis by Origination Year 2019 | 8,278 | 2,558
Amortized Cost Basis by Origination Year 2018 | 264 | 1,645
Amortized Cost Basis by Origination Year, Prior to 2017 | 2,524 | 1,278
Revolving Loans | 7,654 | 5,389
Revolving Loans Converted to Term | 4,124 | 5,029
Total loans | 25,223 | 17,733
Commercial and Industrial [Member] | Classified - substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Amortized Cost Basis by Origination Year 2022 | 93 | 134
Amortized Cost Basis by Origination Year 2021 | 3,209 | 236
Amortized Cost Basis by Origination Year 2020 | 976 | 18,465
Amortized Cost Basis by Origination Year 2019 | 2,157 | 766
Amortized Cost Basis by Origination Year 2018 | 97 | 2,139
Amortized Cost Basis by Origination Year, Prior to 2017 | 2,854 | 1,419
Revolving Loans | 1,066 | 3,723
Revolving Loans Converted to Term | 5,420 | 5,136
Total loans | $ 15,872 | $ 32,018

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