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Loans and Allowance for Credit Losses - Additional Information (Detail) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2022 USD ($) | Jun. 30, 2021 USD ($) | Jun. 30, 2022 USD ($) | Jun. 30, 2021 USD ($) | Dec. 31, 2021 USD ($)
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |
Proceeds from sales of loans held for sale |  |  | $ 22,267,000 | $ 88,609,000 |
Nonaccrual Loans | $ 18,117,000 |  | 18,117,000 |  | $ 92,300,000
Restructured loans | 11,200,000 |  | 11,200,000 |  | 7,300,000
Total Past Due | 18,972,158,000 |  | 18,972,158,000 |  | 17,170,871,000
Non accrual loans with no related allowance for credit losses | 18,117,000 |  | 18,117,000 |  | 85,948,000
Accrued interest on loans | 52,100,000 |  | $ 52,100,000 |  | 45,200,000
Number of reasonable and supportable forecast period |  |  | 1 year |  |
Commitments to lend to borrowers with loan modifications classified as TDR's | 0 | $ 0 | $ 0 | $ 0 |
Number of Contracts |  | 0 |  | 0 |
Default payment of troubled restructuring | 0 | $ 0 | 0 | $ 0 |
Commercial Real Estate Portfolio Segment |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |
Nonaccrual Loans | 2,600,000 |  | 2,600,000 |  | 4,688,000
Total Past Due | 6,725,833,000 |  | 6,725,833,000 |  | 6,267,544,000
Non accrual loans with no related allowance for credit losses | $ 2,600,000 |  | $ 2,600,000 |  | 4,688,000
Number of Contracts | 2 |  | 2 |  |
Default payment of troubled restructuring, pre-modification | $ 5,100 |  | $ 5,100 |  |
Default payment of troubled restructuring, post-modification | 4,300 |  | $ 4,300 |  |
Minimum [Member] |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |
Number of reasonable and supportable forecast period |  |  | 1 year |  |
Maximum [Member] |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |
Number of reasonable and supportable forecast period |  |  | 3 years |  |
Individually Evaluated Loans and Collateral Dependent Assets [Member] |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |
Loans associated allowance |  |  |  |  | 1,000,000.0
Greater than 90 days Past Due and Accruing [Member] |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |
Total Past Due | 3,446,000 |  | $ 3,446,000 |  | $ 2,633,000
Greater than 90 days Past Due and Accruing [Member] | Commercial Real Estate Portfolio Segment |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |
Total Past Due | $ 100,000 |  | 100,000 |  |
Factoring Loan [Member] |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |
Sale of loan portfolio |  |  | 82,600,000 |  |
Gain of sale of loan portfolio |  |  | 2,400,000 |  |
Consumer Real Estate [Member] |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |
Proceeds from sales of loans held for sale |  |  | $ 22,300,000 | $ 88,600,000 |

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