Commitments and Contingencies - Summary of Commitments (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Commitments and Contingencies
Investment Commitment	$ 177,032
2019 Funding	8,977
Total Commitments funded	97,063
Remaining commitment	79,969
Real estate properties
Commitments and Contingencies
Investment Commitment	77,882
2019 Funding	7,216
Total Commitments funded	53,003
Remaining commitment	24,879
Accrued incentives and earn-out liabilities
Commitments and Contingencies
Investment Commitment	9,000
Remaining commitment	9,000
Mortgage loans
Commitments and Contingencies
Investment Commitment	64,200
2019 Funding	1,454
Total Commitments funded	20,045
Remaining commitment	44,155
Commitments To Expand and Renovate Properties
Commitments and Contingencies
Investment Commitment	35,700
Contingent Funding Commitments
Commitments and Contingencies
Investment Commitment	28,500
Joint venture investments
Commitments and Contingencies
Investment Commitment	25,650
2019 Funding	293
Total Commitments funded	23,976
Remaining commitment	1,674
Notes receivable
Commitments and Contingencies
Investment Commitment	300
2019 Funding	14
Total Commitments funded	39
Remaining commitment	$ 261