Indebtedness - Summary of Debt Exchange Offer to Exchange All Validly Tendered and Accepted Range Senior Subordinated Notes (Detail) $ in Thousands	Sep. 16, 2016 USD ($)
5.00% Senior Subordinated Notes Due 2023
Debt Instrument [Line Items]
Principal Amount of Notes Validly Tendered	$ 742,291	[1]
Approximate Percentage Validly Tendered	99.00%
5.00% Senior Subordinated Notes Due 2022
Debt Instrument [Line Items]
Principal Amount of Notes Validly Tendered	$ 580,946	[1]
Approximate Percentage Validly Tendered	96.80%
5.75% Senior Subordinated Notes Due 2021
Debt Instrument [Line Items]
Principal Amount of Notes Validly Tendered	$ 477,786	[1]
Approximate Percentage Validly Tendered	95.60%

[1] (1) Prior to exchange premium