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Fair Value - Additional Information (Details) - USD ($)
Sep. 30, 2019
Dec. 31, 2018
Sep. 30, 2018
Fair Value Disclosures [Abstract]      
Valuation allowance on real estate owned $ 0 $ 0 $ 0
Valuation allowance on impaired financing receivable $ 1,763,000 $ 2,096,000 $ 2,109,000