Property Loans, Net of Loan Loss Allowances - Loan Loss Reserves (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Accounts Notes Loans And Financing Receivable Gross Allowance And Net [Abstract]
Balance, beginning of year	$ 7,393,814	$ 7,393,814
Balance, end of year	$ 7,393,814	$ 7,393,814

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Name:	us-gaap_LoansAndLeasesReceivableAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant