Loans - Secured Loans by Lien Position in the Collateral (Details) $ in Thousands		9 Months Ended		12 Months Ended
		Sep. 30, 2019 USD ($) MortgageLoan		Dec. 31, 2018 USD ($) MortgageLoan	Jun. 30, 2019 USD ($)
Loans Details - Secured Loans by Lien Position in the Collateral [Line Items]
Secured loans, principal		$ 86,190	[1]	$ 97,438	$ 96,132
Liens due other lenders at loan closing (in Dollars)		30,869		37,632
Total debt (in Dollars)		117,059		135,070
Appraised property value at loan closing (in Dollars)		$ 218,140		$ 258,134
Percent of total debt to appraised values (LTV) at loan closing	[2]	56.20%		55.00%
Loans - percent		100.00%		100.00%
Number of secured loans | MortgageLoan		47		56
First Trust Deeds [Member]
Loans Details - Secured Loans by Lien Position in the Collateral [Line Items]
Secured loans, principal		$ 71,205		$ 80,348
Loans - percent		83.00%		82.00%
Number of secured loans | MortgageLoan		27		34
Second Trust Deeds [Member]
Loans Details - Secured Loans by Lien Position in the Collateral [Line Items]
Secured loans, principal		$ 14,985		$ 17,090
Loans - percent		17.00%		18.00%
Number of secured loans | MortgageLoan		20		22

[1] Borrower payments are deposited into an independent bank trust account established and administered by RMC, pursuant to California regulations, and are disbursed to the partnership after an appropriate holding period to ensure the funds are collected. Borrower payments deposited into the trust account are not included in the consolidated financial statements until disbursed to the partnership. At September 30, 2019, there was $69,325 in borrower payments held in the RMC trust account, all of which was disbursed to the partnership by October 22, 2019.

[2] Based on appraised values and liens due other lenders at loan closing. The weighted-average loan-to-value (LTV) computation above does not take into account subsequent increases or decreases in property values following the loan closing, nor does it include decreases or increases of the amount owing on senior liens to other lenders.