Other Commitments And Contingencies (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) mortgagenotes developmentproject	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) mortgagenotes developmentproject	Jun. 30, 2018 USD ($)	Aug. 01, 2019	Jul. 19, 2019 USD ($)	Dec. 31, 2018 USD ($)
Document Period End Date			Jun. 30, 2019
Other Commitment	$ 72,600,000		$ 72,600,000
Gain (Loss) Related to Litigation Settlement	0	$ (2,090,000)	0	$ (2,090,000)
Deferred liabilities related to guarantee							$ 16,100,000
Number of economic development bonds	$ 2		2				2
Noncash or Part Noncash Acquisition, Debt Assumed			$ 18,585,000	0
Number of Surety Bonds	4		4
Surety bonds	$ 50,700,000		$ 50,700,000
Number of Surety Bonds Released	1		1
Number of Mortgage Notes Receivable (in mortgage notes) | mortgagenotes	3		3
Mortgage Note and Notes Receivable Commitments	$ 3,000,000.0		$ 3,000,000.0
Transaction costs	6,923,000	$ 405,000	12,046,000	$ 1,014,000
Theatre Properties [Member]
Other Commitment	$ 36,200,000		$ 36,200,000
Development projects in process (in projects) | developmentproject	9		9
recreationproperties [Member]
Other Commitment	$ 24,900,000		$ 24,900,000
Development projects in process (in projects) | developmentproject	3		3
Education Property Member
Other Commitment	$ 11,500,000		$ 11,500,000
Development projects in process (in projects) | developmentproject	4		4
Louisiana Theatre Properties [Member]
Deferred assets related to guarantee							5,300,000
Gain (Loss) Related to Litigation Settlement			$ 0
Deferred liabilities related to guarantee							$ 9,900,000
Number of economic development bonds	$ 1		1
Loss Contingency, Damages Paid, Value			6,200,000
Noncash or Part Noncash Acquisition, Debt Assumed			18,600,000
Guarantor Obligations, Collateral Held Directly or by Third Parties			14,000,000.0
Children's Learning Adventure USA, LLC [Member]
Payments to Acquire Furniture and Fixtures			$ 1,000,000.0
Property Subject to or Available for Operating Lease, Number of Units	21		21
Settlement Consideration	$ 2,400,000		$ 2,400,000
Triple net lease term	20		20
Number of Properties Transferred	4		4
Transaction costs			$ 1,400,000
Mortgages [Member] | Louisiana Theatre Properties [Member]
Loans Receivable, Basis Spread on Variable Rate	15000.00%		15000.00%
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	3.94%		3.94%
Subsequent Event [Member]
Surety Bonds Released						$ 20,300,000
Subsequent Event [Member] | Children's Learning Adventure USA, LLC [Member]
Number of Properties Transferred					3