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Derivative Instruments Interest Rate Swap Instruments (Details)
3 Months Ended
Mar. 31, 2017
USD ($)
Mar. 31, 2016
USD ($)
agreement
Derivative [Line Items]    
Amount of Gain (Loss) Recognized in Net Loss on Derivative (Ineffective Portion and Amounts Excluded from Effectiveness Testing) $ 1,000 $ 0
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months $ 16,003,000  
Number of interest rate derivatives held | agreement   0
Designated as Hedging Instrument | London Interbank Offered Rate (LIBOR) | Interest Rate Swap 1    
Derivative [Line Items]    
Strike Rate 1.97%  
Notional Amount $ 750,000,000  
Designated as Hedging Instrument | London Interbank Offered Rate (LIBOR) | Interest Rate Swap 2    
Derivative [Line Items]    
Strike Rate 1.97%  
Notional Amount $ 750,000,000  
Designated as Hedging Instrument | London Interbank Offered Rate (LIBOR) | Interest Rate Swap 3    
Derivative [Line Items]    
Strike Rate 1.59%  
Notional Amount $ 1,100,000,000  
Designated as Hedging Instrument | London Interbank Offered Rate (LIBOR) | Interest Rate Swap 4    
Derivative [Line Items]    
Strike Rate 1.63%  
Notional Amount $ 595,000,000  
Designated as Hedging Instrument | London Interbank Offered Rate (LIBOR) | Interest Rate Swap 5    
Derivative [Line Items]    
Strike Rate 1.60%  
Notional Amount $ 325,000,000  
Interest Rate Swap    
Derivative [Line Items]    
Derivative, net liability position, fair value $ 5,172,000