Concentration of Credit Risk - Additional Information (Detail) $ in Millions		12 Months Ended
	Feb. 12, 2016 USD ($)	Dec. 31, 2015 USD ($) Customer	Dec. 31, 2014 USD ($)
Accounts Receivable [Member]
Concentration Risk [Line Items]
Accounts Receivable		$ 38.6	$ 19.4
Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Number of Customers | Customer		3
Customer Concentration Risk [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration of credit risk		10.40%	5.40%
Customer Concentration Risk [Member] | Subsequent Event [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Accounts Receivable	$ 26.6
Concentration of credit risk	68.90%