Fair Value - Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Detail) - Deferred Acquisition Costs [Member] $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($)	[1]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Begining Balance	$ 789
Payments	(789)
Ending Balance	$ 0

[1] Represents deferred acquisition costs related to the acquisition of a supplier of refrigerants and compressed gases in January 2015. See Note 8 for further details.