MSRs - MSR Activity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Schedule Of Mortgage Service Rights Activity [Line Items]
Balance at beginning of year	$ 555,172,891	$ 0
Changes in fair value due to:
Balance at end of year	635,260,420	555,172,891
Mortgage servicing rights
Schedule Of Mortgage Service Rights Activity [Line Items]
Balance at beginning of year	3,997,786	2,963,861
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	(572,963)	375,016
Other changes to fair value	(724,616)	(366,220)
Balance at end of year	2,700,207	3,997,786
Loans associated with MSRs	$ 333,563,728	$ 407,332,854
MSR values as percent of loans	0.81%	0.98%