Debt - Summary of Unamortized Deferred Financing Costs Associated with Consolidated Debt Obligations (Detail) - USD ($) $ in Thousands		Dec. 31, 2016	[1]	Dec. 31, 2015
Debt Instrument [Line Items]
Unamortized deferred financing costs		$ 0		$ 21,969
OLLC $2.0 billion revolving credit facility, variable-rate, due March 2018
Debt Instrument [Line Items]
Unamortized deferred financing costs	[2]	0		3,672
2021 Senior Notes, fixed-rate, due May 2021 [Member]
Debt Instrument [Line Items]
Unamortized deferred financing costs	[3]	0		11,194
2022 Senior Notes, fixed-rate, due August 2022 [Member]
Debt Instrument [Line Items]
Unamortized deferred financing costs	[3]	$ 0		$ 7,103

[1] At December 31, 2016, there were no remaining unamortized deferred financing costs as such costs were written off due to a default and event of default and the uncertainty regarding anticipated financial covenant violation at December 31, 2016. See discussion noted above.

[2] Unamortized deferred financing costs are amortized over the remaining life of our revolving credit facility.

[3] Unamortized deferred financing costs are amortized using the straight line method which generally approximates the effective interest method.