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Loans Receivable - Summary of Allowance for Loan Losses On Loans Receivables (Parenthetical) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Receivables [Abstract] |  |  |  |  |  |
Provision for (reversal of) credit losses | $ (672) | $ 4,601 |  | $ 6,552 | $ 4,669 |
Increase (decrease) to allowance for loan loss | (658) | 1,500 |  | 6,500 | 1,700 |
Purchased non-credit deteriorated loans |  | 3,152 | [1] |  | 3,152 | [2]
Increase decrease in reserve for unfunded liabilities | $ (14) | $ (87) |  | $ 36 | $ (152) |
[1] | The provision for credit losses on the Consolidated Statement of Income is $4.6 million comprising of an increase of $3.2 million related to purchased non-credit deteriorated loans acquired, $1.5 million increase to the allowance for loan loss and a $87 thousand reduction to the reserve for unfunded liabilities.
[2] | The provision for credit losses on the Consolidated Statement of Income is $4.7 million comprising of an increase of $3.2 million related to purchased non-credit deteriorated loans acquired, $1.7 million increase to the allowance for loan loss and a $152 thousand reduction to the reserve for unfunded liabilities.

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- Definition Financing receivable purchased with non credit deterioration allowance for credit loss at acquisition date. + References No definition available. + Details
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- Definition Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 220 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 21 -Publisher FASB -URI https://asc.fasb.org/1943274/2147476153/220-40-55-21 Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-11B Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(11)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 + Details
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