Quarterly report pursuant to Section 13 or 15(d)

Secured Loans Receivable (Summary of Carrying-value of Secured Loans) (Details)

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Secured Loans Receivable (Summary of Carrying-value of Secured Loans) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Jun. 30, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Secured loans $ 104,757 $ 110,424
Secured loans originated by company and with related party    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Secured loans 50,835 35,823
Secured loans originated    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Secured loans 33,854 23,300
Secured loans originated - with a related party    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Secured loans 16,981 12,523
Secured loans acquired    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Secured loans $ 53,922 $ 74,601