Other Commitments And Contingencies (Details)		3 Months Ended
	Oct. 20, 2011 USD ($)	Mar. 31, 2016 USD ($) developmentproject mortgagenotes	Dec. 31, 2015 USD ($)
Commitment to fund project development		$ 274,600,000
Property under development		$ 266,574,000	$ 378,920,000
Number of Surety Bonds		3
Surety bonds		$ 21,700,000
Number of Mortgage Notes Receivable (in mortgage notes) | mortgagenotes		4
Mortgage notes receivable with commitments		$ 17,200,000
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		7
Commitment to fund project development		$ 43,100,000
recreationproperties [Member]
Development projects in process (in projects) | developmentproject		4
Commitment to fund project development		$ 56,000,000
Concord Resort [Member]
Commitment to fund project development		120,000,000
Adelaar Infrastructure [Member]
Commitment to fund project development		90,000,000
Property under development		$ 35,000,000
Public Charter School Property Member
Development projects in process (in projects) | developmentproject		24
Commitment to fund project development		$ 175,500,000
Louisiana Theatre Properties [Member]
Development projects in process (in projects) | developmentproject		2
Economic development revenue bond term		30 years
Deferred assets related to guarantee		$ 9,600,000
Deferred liabilities related to guarantee		9,600,000
Loss contingency		0
Adelaar [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%