Notes and Other Receivables (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Nov. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable		$ 71,895	$ 100,926
Commitment to fund preferred equity investment in the project	$ 12,500		153,800
Annualized preferred return rate	9.90%
Commitment extension option	2 years
Notes receivable, secured, bearing interest at 10.00%, due May 2021 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable		$ 15,226	13,762
Stated interest rate		10.00%
Note receivable, secured, bearing interest at 10.75%, due September 2020 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable		$ 32,650	29,318
Stated interest rate		10.75%
Related party note receivable, secured, bearing interest at 9.50%, due October 2019 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable		$ 6,618	6,656
Stated interest rate		9.50%
Related party note receivable, secured, bearing interest at 3.50%, due March 2018 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable		$ 0	29,500
Stated interest rate		3.50%
Notes and other receivables from affiliates [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable		$ 4,457	5,061
Other receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable		$ 12,944	$ 16,629