Securities Sold Under Agreements to Repurchase - Carrying Value of Repurchase Agreements (Details) - Overnight and Continuous - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Securities Sold Under Agreements to Repurchase
Total	$ 1,831,501	$ 1,486,850
U.S. government and federal agency
Securities Sold Under Agreements to Repurchase
Total	0	113,509
Residential mortgage-backed securities
Securities Sold Under Agreements to Repurchase
Total	1,831,501	1,306,047
Commercial mortgage-backed securities
Securities Sold Under Agreements to Repurchase
Total	$ 0	$ 67,294

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 860
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 860
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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 860
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-Section 50
-Paragraph 7
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