Fair Value Measurements Carrying Value and Fair Value of Long-Term Debt and Other Financial Instruments (Detail) - USD ($) $ in Thousands		Sep. 30, 2015		Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Common stock warrants, Carrying Value		$ 7,164		$ 12,123
Contingent consideration liability, Carrying Value		27,810		9,131
Contingent consideration liability, Fair Value	[1]	$ 27,810		$ 9,131
Long term debt fair value		9.87%		14.11%
Retail Credit Agreement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Line of credit, Carrying Value	[2]	$ 27,857		$ 22,750
Lines of credit, Fair Value	[1],[2]	27,857		22,750
Texadian Uncommitted Credit Agreement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Line of credit, Carrying Value		0		26,500
Lines of credit, Fair Value	[1]			26,500
Mid Pac Credit Agreement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Line of credit, Carrying Value		47,917	[2]	0
Lines of credit, Fair Value	[1],[2]	47,917
Tranche B Term Loan [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Line of credit, Carrying Value		93,851		87,360
Lines of credit, Fair Value	[1]	99,822		87,068
Warrant [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Common stock warrants, Carrying Value		7,164		12,123
Net Carrying Value on Balance Sheet	[1]	$ 7,164		$ 12,123

[1] The fair values of these instruments are considered Level 3 measurements in the fair value hierarchy.

[2] Fair value approximates carrying value due to the floating rate interest which approximates a current market rate.