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Derivative Instruments, Hedging Activities and Other Comprehensive Income (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Average cap interest rate 2.75%    
Interest rate fair value hedge liability at fair value $ 4,800 $ 4,400  
Gain (loss) reclassified from AOCI into income, effective portion, net (5,600) (5,100) $ (2,800)
Interest expense 56,432 45,513 $ 27,994
Increase As Hedged Forecasted Interest Payments Occur      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Interest expense 2,600    
Prepaid Expenses and Other Current Assets      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Interest rate fair value hedge asset at fair value 200 700  
Accounts Payable and Accrued Liabilities      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Interest rate fair value hedge liability at fair value 5,000 5,100  
Accrued Interest      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Interest rate fair value hedge liability at fair value 400 $ 500  
Cash Flow Hedging      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Derivative, notional amount $ 498,300