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Fair Value Measurements - Schedule of Differences between Fair Value and Principal Balance for Loans Held for Sale Measured at Fair Value (Details) - USD ($) | Jun. 30, 2017 | Dec. 31, 2016
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Fair Value |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Mortgage loans held for sale measured at fair value | $ 427,416 | $ 507,442
Aggregate Unpaid Principal Balance |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Mortgage loans held for sale measured at fair value | 412,007 | 501,503
Difference |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Mortgage loans held for sale measured at fair value | $ 15,409 | $ 5,939

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