Mortgage and Other Notes Receivable - Summary (Details) - USD ($) $ in Thousands		9 Months Ended	12 Months Ended
		Sep. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Assignment of the partnership interest (as a percent)		100.00%
Mortgage and Other Notes Receivable [Line Items]
Balance	[1]	$ 5,818	$ 7,672
Mortgages
Mortgage and Other Notes Receivable [Line Items]
Balance		3,604	$ 4,884
Mortgages | D'lberville Promenade
Mortgage and Other Notes Receivable [Line Items]
Balance		$ 1,100
Mortgages | Minimum
Mortgage and Other Notes Receivable [Line Items]
Interest Rate (as a percent)		4.90%	4.00%
Mortgages | Maximum
Mortgage and Other Notes Receivable [Line Items]
Interest Rate (as a percent)		9.50%	9.50%
Other Notes Receivable
Mortgage and Other Notes Receivable [Line Items]
Balance		$ 2,214	$ 2,788
Other Notes Receivable | Minimum
Mortgage and Other Notes Receivable [Line Items]
Interest Rate (as a percent)		4.00%	4.00%
Other Notes Receivable | Maximum
Mortgage and Other Notes Receivable [Line Items]
Interest Rate (as a percent)		5.00%	5.00%

[1] As of September 30, 2019, includes $484,345 of assets related to consolidated variable interest entities that can be used only to settle obligations of the consolidated variable interest entities and $346,999 of liabilities of consolidated variable interest entities for which creditors do not have recourse to the general credit of the Company. See Note 7.