Fair Value Measurements Carrying Value and Fair Value of Long-Term Debt and Other Financial Instruments (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Amortization of Intangible Assets		$ 1,000	$ 900	$ 1,600	$ 1,800
Term loan		171,407		171,407		$ 136,610
Common stock warrants, Carrying Value		13,832		13,832		12,123
Common stock warrants, Fair Value	[1]	13,832		13,832		12,123
Contingent consideration liability, Carrying Value		23,555		23,555		9,131
Contingent consideration liability, Fair Value	[1]	$ 23,555		$ 23,555		$ 9,131
Long term debt fair value		11.36%		11.36%		14.11%
Retail Credit Agreement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Line of credit, Carrying Value		$ 28,928		$ 28,928		$ 22,750	[2]
Lines of credit, Fair Value	[1],[2]	28,928		28,928		22,750
Texadian Uncommitted Credit Agreement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Line of credit, Carrying Value		0		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		48,958		48,958		0
Tranche B Term Loan [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Line of credit, Carrying Value		93,521		93,521		87,360
Lines of credit, Fair Value	[1]	100,514		100,514		$ 87,068
Mid Pac Revolving Credit Facility [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Lines of credit, Fair Value	[1],[2]	$ 48,958		$ 48,958

[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.