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Indebtedness - Senior Notes - Additional Information (Detail) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Sep. 30, 2016
May 31, 2015
Dec. 31, 2017
Oct. 05, 2017
Dec. 31, 2016
Sep. 16, 2016
Debt Instrument [Line Items]            
Aggregate principal amount     $ 2,877,349   $ 2,877,849  
Senior Notes            
Debt Instrument [Line Items]            
Maximum redemption price of notes as percentage of principal amount     101.00%      
5.875% Senior Notes Due 2022            
Debt Instrument [Line Items]            
Interest rate on notes     5.875% 5.875% 5.875%  
Aggregate principal amount [1]     $ 329,244   $ 329,244  
5.875% Senior Notes Due 2022 | Senior Notes Exchange Offer | Unsecured Debt            
Debt Instrument [Line Items]            
Senior notes exchange amount $ 329,200          
Interest rate on notes 5.875%         5.875%
Maximum redemption price of notes as percentage of principal amount     100.00%      
5.00% Senior Notes Due 2023            
Debt Instrument [Line Items]            
Senior notes exchange amount $ 741,531          
Interest rate on notes 5.00%   5.00% 5.00% 5.00% 5.00%
Aggregate principal amount     $ 741,531   $ 741,531  
5.00% Senior Notes Due 2022            
Debt Instrument [Line Items]            
Senior notes exchange amount $ 580,032          
Interest rate on notes 5.00%   5.00% 5.00% 5.00% 5.00%
Aggregate principal amount     $ 580,032   $ 580,032  
5.75% Senior Notes Due 2021            
Debt Instrument [Line Items]            
Senior notes exchange amount $ 475,952          
Interest rate on notes 5.75%   5.75% 5.75% 5.75% 5.75%
Aggregate principal amount     $ 475,952   $ 475,952  
4.875% Senior Notes Due 2025            
Debt Instrument [Line Items]            
Interest rate on notes   4.875% 4.875%   4.875%  
Maximum redemption price of notes as percentage of principal amount   101.00%        
Aggregate principal amount   $ 750,000 $ 750,000   $ 750,000  
Net proceeds after underwriting discounts and commissions   737,400        
Underwriting discounts and commissions   $ 12,600        
[1] Represents senior notes assumed in the MRD Merger that were not purchased for cash but were exchanged for Range 5.875% senior notes due 2022. See Senior Notes Exchange and Cash Tender Offer below.