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Loans and ACL - Summary of Investment of PCI Loans (Detail) - Real Estate [Member] $ in Thousands | 12 Months Ended
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Dec. 31, 2022 USD ($)
30-89 Days Past Due [Member] |
Financing Receivable, Past Due [Line Items] |
Purchase loans | $ 354
30-89 Days Past Due [Member] | Commercial And Industrial [Member] |
Financing Receivable, Past Due [Line Items] |
Purchase loans | 0
30-89 Days Past Due [Member] | Commercial Construction [Member] |
Financing Receivable, Past Due [Line Items] |
Purchase loans | 0
30-89 Days Past Due [Member] | Commercial Mortgage [Member] |
Financing Receivable, Past Due [Line Items] |
Purchase loans | 0
30-89 Days Past Due [Member] | Residential Mortgages [Member] |
Financing Receivable, Past Due [Line Items] |
Purchase loans | 354
30-89 Days Past Due [Member] | Consumer Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Purchase loans | 0
Greater than 90 Days Past Due & Accruing [Member] |
Financing Receivable, Past Due [Line Items] |
Purchase loans | 0
Greater than 90 Days Past Due & Accruing [Member] | Commercial And Industrial [Member] |
Financing Receivable, Past Due [Line Items] |
Purchase loans | 0
Greater than 90 Days Past Due & Accruing [Member] | Commercial Construction [Member] |
Financing Receivable, Past Due [Line Items] |
Purchase loans | 0
Greater than 90 Days Past Due & Accruing [Member] | Commercial Mortgage [Member] |
Financing Receivable, Past Due [Line Items] |
Purchase loans | 0
Greater than 90 Days Past Due & Accruing [Member] | Residential Mortgages [Member] |
Financing Receivable, Past Due [Line Items] |
Purchase loans | 0
Greater than 90 Days Past Due & Accruing [Member] | Consumer Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Purchase loans | 0
Current Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Purchase loans | 58,394
Current Loans [Member] | Commercial And Industrial [Member] |
Financing Receivable, Past Due [Line Items] |
Purchase loans | 1,481
Current Loans [Member] | Commercial Construction [Member] |
Financing Receivable, Past Due [Line Items] |
Purchase loans | 7
Current Loans [Member] | Commercial Mortgage [Member] |
Financing Receivable, Past Due [Line Items] |
Purchase loans | 51,223
Current Loans [Member] | Residential Mortgages [Member] |
Financing Receivable, Past Due [Line Items] |
Purchase loans | 5,324
Current Loans [Member] | Consumer Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Purchase loans | 359
Total Loan [Member] |
Financing Receivable, Past Due [Line Items] |
Purchase loans | 58,748
Total Loan [Member] | Commercial And Industrial [Member] |
Financing Receivable, Past Due [Line Items] |
Purchase loans | 1,481
Total Loan [Member] | Commercial Construction [Member] |
Financing Receivable, Past Due [Line Items] |
Purchase loans | 7
Total Loan [Member] | Commercial Mortgage [Member] |
Financing Receivable, Past Due [Line Items] |
Purchase loans | 51,223
Total Loan [Member] | Residential Mortgages [Member] |
Financing Receivable, Past Due [Line Items] |
Purchase loans | 5,678
Total Loan [Member] | Consumer Loans [Member] |
Financing Receivable, Past Due [Line Items] |
Purchase loans | $ 359

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