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Fair Value of Financial Instruments - Rollforward of Balance Sheet Amounts Within Level 3 Valuation Hierarchy (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Assets measured on recurring basis, unobservable input reconciliation, calculation [Roll Forward] |  |  |  |
Transfers out of Level 3 |  |  | $ 0 |
Available-for-sale Securities |  |  |  |
Assets measured on recurring basis, unobservable input reconciliation, calculation [Roll Forward] |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 |  |  |  | $ 1
Recurring | Other investments |  |  |  |
Assets measured on recurring basis, unobservable input reconciliation, calculation [Roll Forward] |  |  |  |
Fair value, beginning of period | $ 199,420,000 | $ 168,312,000 | 176,551,000 | 157,140,000
Total realized gains (losses) included in income | 4,822,000 | 2,414,000 | 8,396,000 | 1,879,000
Changes in unrealized gains/losses included in other comprehensive income (loss) | 0 | 0 | 0 | 0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 | 0 | 0 | 0 | 0
Purchases | 12,879,000 | 5,608,000 | 37,501,000 | 22,910,000
Issuances | 0 | 0 | 0 | 0
Settlements | (1,476,000) | (6,078,000) | (6,803,000) | (11,673,000)
Transfers out of Level 3 | 0 | 0 | 0 | 0
Fair value, end of period | 215,645,000 | 170,256,000 | 215,645,000 | 170,256,000
Total net realized gains (losses) included in income | 4,822,000 | 2,414,000 | 8,396,000 | 1,879,000
Recurring | Available-for-sale Securities |  |  |  |
Assets measured on recurring basis, unobservable input reconciliation, calculation [Roll Forward] |  |  |  |
Fair value, beginning of period | 13,086,000 | 13,197,000 | 13,224,000 | 479,000
Total realized gains (losses) included in income | 14,000 | 13,000 | 40,000 | 39,000
Changes in unrealized gains/losses included in other comprehensive income (loss) | 0 | 2,000 | 2,000 | 18,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 | 0 | 0 | 0 | 12,841,000
Purchases | 0 | 0 | 0 | 0
Issuances | 0 | 0 | 0 | 0
Settlements | (173,000) | 0 | (339,000) | (165,000)
Transfers out of Level 3 | 0 | 0 | 0 | 0
Fair value, end of period | 12,927,000 | 13,212,000 | 12,927,000 | 13,212,000
Total net realized gains (losses) included in income | 14,000 | 13,000 | 40,000 | 39,000
Recurring | Servicing Contracts |  |  |  |
Assets measured on recurring basis, unobservable input reconciliation, calculation [Roll Forward] |  |  |  |
Fair value, beginning of period | 10,903,000 | 11,301,000 | 11,854,000 | 0
Total realized gains (losses) included in income | (219,000) | (343,000) | (1,170,000) | 10,958,000
Changes in unrealized gains/losses included in other comprehensive income (loss) | 0 | 0 | 0 | 0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 | 0 | 0 | 0 | 0
Purchases | 0 | 0 | 0 | 0
Issuances | 0 | 0 | 0 | 0
Settlements | 0 | 0 | 0 | 0
Transfers out of Level 3 | 0 | 0 | 0 | 0
Fair value, end of period | 10,684,000 | 10,958,000 | 10,684,000 | 10,958,000
Total net realized gains (losses) included in income | $ (219,000) | $ (343,000) | $ (1,170,000) | $ 10,958,000

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 101 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-101 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 102 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-102 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Amount of gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 101 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-101 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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