Discontinued Operations (Details)		3 Months Ended
	Jun. 02, 2016 USD ($)	Mar. 31, 2017 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Jun. 20, 2016 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent		83.68%
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners		16.32%
Dividends paid to noncontrolling interest		$ 816,000	$ 816,000		$ 0
Oppenheimer Multi Family Housing And Healthcare Finance [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Loans Insured by U.S. Department of Housing and Development	480
Disposal Group, Including Discontinued Operation, Consideration			3,800,000			$ 45,000,000
Disposal Group, Including Discontinued Operations, Consideration Withheld						$ 1,400,000
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	$ 14,900,000
Dividends paid to noncontrolling interest		$ 816,000
Business Pipeline of Mortgage Loans [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of assets			$ 1,400,000	$ 1,500,000