Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurement - Schedule of Fair Value, Financial Instruments Measured on Recurring Basis (Details)

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Fair Value Measurement - Schedule of Fair Value, Financial Instruments Measured on Recurring Basis (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets $ 111 $ 5,353
Derivative liabilities 56,590 10,305
Fair value, measurements, recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 111 6,958
Derivative liabilities 56,590 11,910
Fair value, measurements, recurring | Interest rate swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 111 6,958
Derivative liabilities 56,590 11,910
Fair value, measurements, recurring | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 0 0
Derivative liabilities 0 0
Fair value, measurements, recurring | Level 1 | Interest rate swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 0 0
Derivative liabilities 0 0
Fair value, measurements, recurring | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 111 6,958
Derivative liabilities 56,590 11,910
Fair value, measurements, recurring | Level 2 | Interest rate swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 111 6,958
Derivative liabilities 56,590 11,910
Fair value, measurements, recurring | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 0 0
Derivative liabilities 0 0
Fair value, measurements, recurring | Level 3 | Interest rate swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 0 0
Derivative liabilities $ 0 $ 0