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Other Commitments And Contingencies (Details)		9 Months Ended
	Oct. 20, 2011 USD ($)	Sep. 30, 2015 USD ($) mortgagenotes developmentproject
Commitment to fund project development		$ 259,700,000
Number of Mortgage Notes Receivable (in mortgage notes) | mortgagenotes		4
Mortgage notes receivable with commitments		$ 43,800,000
Guarantor Obligations, Maximum Exposure, Undiscounted		$ 22,900,000
Loss Contingency, Damages Sought, Value	$ 800,000,000
Theatre Properties [Member]
Development projects in process (in projects) | developmentproject		8
Commitment to fund project development		$ 23,500,000
recreationproperties [Member]
Development projects in process (in projects) | developmentproject		3
Commitment to fund project development		$ 30,600,000
Public Charter School Property Member
Development projects in process (in projects) | developmentproject		27
Commitment to fund project development		$ 205,600,000
Louisiana Theatre Properties [Member]
Development projects in process (in projects) | developmentproject		2
Economic development revenue bond term		30 years
Deferred assets related to guarantee		$ 9,700,000
Deferred liabilities related to guarantee		9,700,000
Loss contingency		0
Concord Resort [Member]
Loss Contingency, Damages Sought, Value		500,000,000
Sullivan County Planned Casino and Resort [Member]
Loss Contingency, Damages Sought, Value		$ 1,500,000,000
Minimum [Member] | Louisiana Theatre Properties [Member]
Economic development revenue bond annual fees percentage		2.88%
Maximum [Member] | Louisiana Theatre Properties [Member]
Economic development revenue bond annual fees percentage		4.00%

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