Commitments and Loss Contingency - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)
Qelp [Member]
Long-term Purchase Commitment [Line Items]
Expected future value of contingent consideration	$ 9.1
Contingent consideration expected payment period	3 years
Minimum [Member]
Long-term Purchase Commitment [Line Items]
Term of agreements with third party vendors	1 year
Maximum [Member]
Long-term Purchase Commitment [Line Items]
Term of agreements with third party vendors	5 years