MSRs - MSR Activity (Details)	6 Months Ended
	Jun. 30, 2019 USD ($) mortgage_loan_trust	Jun. 30, 2018 USD ($)
Movement in Mortgage Service Rights
Number of residential mortgage loan securitization trusts | mortgage_loan_trust	4
Mortgage Servicing Rights
Movement in Mortgage Service Rights
Balance at beginning of period	$ 3,997,786	$ 2,963,861
MSRs relating to sales to securitizations	0	0
MSRs related to deconsolidation of securitization trust	0	1,025,129
Changes in fair value due to:
Changes in valuation inputs or assumptions used in valuation model	(589,660)	336,406
Other changes to fair value	(249,457)	(219,783)
Balance at end of period	3,158,669	4,105,613
Loans associated with MSRs	$ 381,847,136	$ 428,153,251
MSR values as percent of loans	0.83%	0.96%