Commitments and Contingencies Additional Information (Detail)	6 Months Ended
	Jun. 30, 2016 USD ($) claim	Dec. 31, 2015 USD ($)
Long-term Purchase Commitment [Line Items]
Multiplier for earnout payment before EBITDA	4
Minimum EBITDA benchmark	$ 3,500,000.0
Maximum earnout payment amount	$ 4,500,000.0
Number of remaining claim to be resolved | claim	2
Bankruptcy claims amount of claims to be settled		$ 22,400,000
Estimated value of claims remaining to be settled	$ 500,000
Maximum bankruptcy claims remaining	$ 22,400,000
Predecessor working ownership percentage	3.40%
Allowed claims, settlement ratio	0.0544
Tesoros
Long-term Purchase Commitment [Line Items]
Deductible for indemnification obligation	$ 1,000,000
Indemnification obligation cap	15,000,000
Clear Air Act Violation
Long-term Purchase Commitment [Line Items]
Final decree high estimate	30,000,000
Pending Litigation
Long-term Purchase Commitment [Line Items]
Claim amount for environmental losses (more than)	$ 1,000,000