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Derivatives and Hedging Activities - Cumulative Basis Adjustments on Hedged Items Designated as Fair Value Hedges and the Related Amortized Cost of the Hedged Items (Details) - USD ($) $ in Thousands | Jun. 30, 2026 | Dec. 31, 2025
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Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |
Amortized cost (excluding fair value hedge basis adjustment) | $ 659,375 | $ 682,878
Hedged Asset, Statement of Financial Position [Extensible Enumeration] | Debt securities available-for-sale, at estimated fair value | Debt securities available-for-sale, at estimated fair value
Fair value hedge basis adjustment | $ (12,223) | $ (4,038)

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- Definition Amount of asset hedged in fair value hedging relationship. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 181 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480401/815-10-55-181 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4EE -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4EE + Details
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- Definition Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk. Excludes cumulative basis adjustment related to foreign exchange risk. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 181 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480401/815-10-55-181 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4EE -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4EE + Details
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