Debt - Summary of Unamortized Deferred Financing Costs Associated with Consolidated Debt Obligations (Parenthetical) (Detail) - USD ($)		Dec. 31, 2016		Dec. 31, 2015
Debt Instrument [Line Items]
Unamortized deferred financing costs		$ 0	[1]	$ 21,969,000
OLLC $2.0 billion revolving credit facility, variable-rate, due March 2018
Debt Instrument [Line Items]
Revolving credit facility		2,000,000,000		2,000,000,000
Unamortized deferred financing costs	[2]	$ 0	[1]	$ 3,672,000

[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.