Commitments and Contingencies (Details Textuals)	3 Months Ended
	Mar. 31, 2020 USD ($) loan	Dec. 31, 2019 USD ($)
Mortgage Loans on Real Estate
Aggregate unpaid principal balance of mortgage loans on real estate	$ 26,200,000	$ 176,900,000
Loss Contingency Accrual	$ 0
Re-performing loans | Purchase commitment | One-to-four family residences
Mortgage Loans on Real Estate
Number of mortgage loans on real estate | loan	906
Aggregate unpaid principal balance of mortgage loans on real estate	$ 162,000,000.0