Equity Investments - Northstar New Jersey (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Shortfall payment	$ 20.0
Northstar NJ
Schedule of Equity Method Investments [Line Items]
Incentive compensation cap, percentage of net income		3.00%
Investee payment to third party cap, percentage of net income		2.00%