Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments (Narrative) (Details)

v3.7.0.1
Fair Value of Financial Instruments (Narrative) (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
Deferred finance costs, net [1] $ 30,804 $ 27,174
Senior notes | 6.625% Senior Notes due 2023    
Debt Instrument [Line Items]    
Deferred finance costs, net 5,600  
Senior notes | 6.000% Senior Notes due 2024    
Debt Instrument [Line Items]    
Deferred finance costs, net 10,500  
Senior notes | 6.375% Senior Notes due 2025    
Debt Instrument [Line Items]    
Deferred finance costs, net 14,600  
Carry value | Senior notes    
Debt Instrument [Line Items]    
Fair value of notes 1,600,000  
Fair value | Senior notes    
Debt Instrument [Line Items]    
Fair value of notes $ 1,600,000  
[1] In accordance with ASU 2015-03, loan issuance costs related to the 2023 Notes, the 2024 Notes and the 2025 Notes (collectively the “Notes”) have been presented as a reduction to the Notes. At June 30, 2017, total unamortized debt issuance costs were $5.6 million for the 2023 Notes, $10.5 million for the 2024 Notes and $14.6 million for the 2025 Notes.