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Derivatives and Hedging Activities - Additional Information (Detail) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2025 USD ($) Derivative | Mar. 31, 2024 USD ($) | Dec. 31, 2024 USD ($) Derivative
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Collateral posted with market value on liability positions with credit risk-related contingent features | $ 15,200,000 |  | $ 42,600,000
Interest Rate Swaps and Caps [Member] |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Number of interest rate swaps | Derivative | 321 |  | 293
Aggregate notional amount | $ 2,100,000,000 |  | $ 1,900,000,000
Income (loss) on derivative instrument not designated hedges | $ 2,000,000 | $ 800,000 |
Risk Participation in Agreements [Member] |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Number of interest rate swaps | Derivative | 29 |  | 24
Aggregate notional amount | $ 275,000,000 |  | $ 233,800,000
Risk Participation out Agreement [Member] |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Number of interest rate swaps | Derivative | 8 |  | 8
Aggregate notional amount | $ 67,500,000 |  | $ 67,700,000
Other Contract [Member] | Forward TBA Contracts [Member] |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Aggregate notional amount | $ 294,000,000 |  | $ 29,000,000

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- Definition The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4H + Details
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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4C Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 50 -Paragraph 4CC -SubTopic 10 -Topic 815 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4CC + Details
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