Long-Term Debt - Lease Finance Obligations - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) Property	Dec. 31, 2015 USD ($)
Debt Instrument [Line Items]
Lease finance obligations	$ 238,539	$ 280,909
Payment of lease finance obligation	$ 23,800
ProBuild Holdings LLC
Debt Instrument [Line Items]
Number of leased properties with single lessor | Property	150
Master lease agreement description	As a result of the ProBuild acquisition, the Company is party to 150 individual property lease agreements with a single lessor as of December 31, 2016. These lease agreements have initial terms ranging from nine to fifteen years (expiring from 2016 through 2021) and renewal options in five-year increments providing for up to approximately 30-year remaining total lease terms.
Maximum | ProBuild Holdings LLC
Debt Instrument [Line Items]
Total lease term	30 years