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Fair Value Measurements Notional Amount of Financial Instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
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Notional Disclosures [Abstract] |  |
Whole loan contracts and related committed IRLCs | $ 8,163 | $ 2,182
Uncommitted IRLCs | 135,450 | 50,746
FMBSs related to uncommitted IRLCs | 143,000 | 53,000
Whole loan contracts and related mortgage loans held for sale | 11,015 | 80,956
FMBSs related to mortgage loans held for sale | 103,000 | 91,000
Mortgage loans held for sale covered by FMBSs | $ 103,258 | $ 90,781

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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 Mortgage Loans Held for Sale Covered by Forward Sales of Mortgage-Backed Securities + 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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