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Fair Value Measurements Notional Amount of Financial Instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
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Notional Disclosures [Abstract] |  |
Whole loan contracts and related committed IRLCs | $ 5,294 | $ 2,354
Uncommitted IRLCs | 273,470 | 208,500
FMBSs related to uncommitted IRLCs | 258,000 | 183,000
Whole loan contracts and related mortgage loans held for sale | 6,813 | 78,142
FMBSs related to mortgage loans held for sale | 192,000 | 131,000
Mortgage loans held for sale covered by FMBSs | $ 192,672 | $ 148,331

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- Definition Best Effort Contracts and Related Mortgage Loans Held for Sale + References No definition available. + Details
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- Definition Forward Sales of Mortgage-Backed Securities Related to Mortgage Loans Held for Sale + References No definition available. + Details
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- Definition Forward Sales of Mortgage-Backed Securities related to Uncommitted Interest Rate Lock Commitments + References No definition available. + Details
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- Definition Notional Amount of Best Effort Contracts and Related Committed Interest Rate Lock Commitments + References No definition available. + Details
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- Definition Notional Amount of Uncommitted Interest Rate Lock Commitments + References No definition available. + Details
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