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Note Receivable, Mesquite (Details) - Aug. 22, 2013 - Mesquite - USD ($)
$ in Millions
Total
Debt Instrument [Line Items]  
Due from the Newport Funds $ 14.0
Cash on hand used to fund Mesquite loan 1.0
InvestCo  
Debt Instrument [Line Items]  
Contributions to fund Mesquite loan 13.0
NGOF  
Debt Instrument [Line Items]  
Contributions to fund Mesquite loan 11.3
NGCF  
Debt Instrument [Line Items]  
Contributions to fund Mesquite loan 1.7
Loans Payable and Loans from Parent Company  
Debt Instrument [Line Items]  
Long term debt gross $ 35.0
Loans Payable and Loans from Parent Company | August 22, 2013 to August 22, 2014  
Debt Instrument [Line Items]  
Interest rate (percent) 7.00%
Loans Payable and Loans from Parent Company | After August 22, 2014  
Debt Instrument [Line Items]  
Interest rate (percent) 8.00%