Real Estate Fund Investments - Schedule of Financial Information for Fund Investment (Details) $ in Thousands	Sep. 30, 2016 USD ($)
Property Fund II [Member]
Investment Holdings [Line Items]
Real estate funds financial	$ 35,708
Real estate funds financial	113
Real estate funds financial	35,595
Real estate funds financial	35,708
Property Fund III [Member]
Investment Holdings [Line Items]
Real estate funds financial	27,609
Real estate funds financial	80
Real estate funds financial	27,529
Real estate funds financial	27,609
Property Fund VII [Member]
Investment Holdings [Line Items]
Real estate funds financial	161,214
Real estate funds financial	1,106
Real estate funds financial	160,108
Real estate funds financial	161,214
Real Estate Investments [Member] | Property Fund II [Member]
Investment Holdings [Line Items]
Real estate funds financial	34,977
Real Estate Investments [Member] | Property Fund III [Member]
Investment Holdings [Line Items]
Real estate funds financial	26,424
Real Estate Investments [Member] | Property Fund VII [Member]
Investment Holdings [Line Items]
Real estate funds financial	160,362
Cash And Cash Equivalent | Property Fund II [Member]
Investment Holdings [Line Items]
Real estate funds financial	604
Cash And Cash Equivalent | Property Fund III [Member]
Investment Holdings [Line Items]
Real estate funds financial	1,185
Cash And Cash Equivalent | Property Fund VII [Member]
Investment Holdings [Line Items]
Real estate funds financial	852
Other Assets [Member] | Property Fund II [Member]
Investment Holdings [Line Items]
Real estate funds financial	127
Other Liabilities [Member] | Property Fund II [Member]
Investment Holdings [Line Items]
Real estate funds financial	113
Other Liabilities [Member] | Property Fund III [Member]
Investment Holdings [Line Items]
Real estate funds financial	80
Other Liabilities [Member] | Property Fund VII [Member]
Investment Holdings [Line Items]
Real estate funds financial	$ 1,106