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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%

X
- Definition Equity Method Investment, Incentive Compensation Cap, Percentage of Net Income + References No definition available. + Details
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Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Equity Method Investment, Investee Payment to Third Party Cap, Percentage of Net Income + References No definition available. + Details
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Data Type: | num:percentItemType
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- Definition Shortfall Payment + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |