Debt Additional Information (Detail)				3 Months Ended		6 Months Ended
	Jun. 23, 2015 USD ($)	Jun. 01, 2015 USD ($)	Apr. 01, 2015 USD ($) loan payment	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	May. 15, 2015 USD ($)	May. 14, 2015 USD ($)	Mar. 31, 2015 USD ($)	Feb. 20, 2015 USD ($)	Dec. 31, 2014 USD ($)	Nov. 14, 2013 USD ($)	Sep. 25, 2013 USD ($)
Debt Disclosure [Line Items]
Amortization of Intangible Assets				$ 1,000,000	$ 900,000	$ 1,600,000	$ 1,800,000
Debt Instrument, Covenant, Leverage Ratio Required, Minimum				1.15		1.15
Debt maturity				$ 4,226,000		$ 4,226,000
Number of quarterly principle payments | payment			28
Maximum number of LIBOR borrowings | loan			5
Term loan				171,407,000		171,407,000						$ 136,610,000
Minimum Net Worth Required for Compliance				12,000,000.0		12,000,000.0
Debt Instruments, Initial Offering Price	$ 750,000,000
ABL Revolving Credit Facility [Member]
Debt Disclosure [Line Items]
Line credit maximum borrowing amount											$ 200,000,000			$ 125,000,000
Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases														$ 50,000,000
Texadian Uncommitted Credit Agreement [Member]
Debt Disclosure [Line Items]
Total capacity at period end				$ 16,300,000		$ 16,300,000
Delayed Draw Term Loan Agreement [Member]
Debt Disclosure [Line Items]
Debt maturity										$ 35,000,000
Mid Pac Petroleum, LLC [Member]
Debt Disclosure [Line Items]
Term loan			$ 45,300,000
Retail Credit Agreement [Member] | HIE Retail [Member]
Debt Disclosure [Line Items]
Letters of Credit Outstanding, Amount									$ 0
Retail Credit Agreement [Member] | HIE Retail [Member] | Term Loan [Member]
Debt Disclosure [Line Items]
Line credit maximum borrowing amount								$ 22,000,000					$ 30,000,000
Covenant Compliance, Amount Of Cash On Hand								3,000,000
Retail Credit Agreement [Member] | HIE Retail [Member] | Revolving Credit Facility [Member]
Debt Disclosure [Line Items]
Line credit maximum borrowing amount													$ 5,000,000
Revolving credit outstanding									$ 0
If Leverage Ratio Is Less Than Three [Member] | London Interbank Offered Rate (LIBOR) [Member] | Mid Pac Revolving Credit Facility [Member]
Debt Disclosure [Line Items]
Debt Instrument Margin Rate						1.75%
If Leverage Ratio Is Less Than Three [Member] | London Interbank Offered Rate (LIBOR) [Member] | Mid Pac Term Loan [Member]
Debt Disclosure [Line Items]
Debt Instrument Margin Rate						2.00%
If Leverage Ratio Is Less Than Three [Member] | Base Rate [Member] | Mid Pac Revolving Credit Facility [Member]
Debt Disclosure [Line Items]
Debt Instrument Margin Rate						(0.25%)
If Leverage Ratio Is Less Than Three [Member] | Base Rate [Member] | Mid Pac Term Loan [Member]
Debt Disclosure [Line Items]
Debt Instrument Margin Rate						0.00%
If Leverage Ratio Is Between Three And Three Point Five [Member] | London Interbank Offered Rate (LIBOR) [Member] | Mid Pac Revolving Credit Facility [Member]
Debt Disclosure [Line Items]
Debt Instrument Margin Rate						2.00%
If Leverage Ratio Is Between Three And Three Point Five [Member] | London Interbank Offered Rate (LIBOR) [Member] | Mid Pac Term Loan [Member]
Debt Disclosure [Line Items]
Debt Instrument Margin Rate						2.25%
If Leverage Ratio Is Between Three And Three Point Five [Member] | Base Rate [Member] | Mid Pac Revolving Credit Facility [Member]
Debt Disclosure [Line Items]
Debt Instrument Margin Rate						0.00%
If Leverage Ratio Is Between Three And Three Point Five [Member] | Base Rate [Member] | Mid Pac Term Loan [Member]
Debt Disclosure [Line Items]
Debt Instrument Margin Rate						0.25%
If Leverage Ratio Is Greater Than Three Point Five [Member] | London Interbank Offered Rate (LIBOR) [Member] | Mid Pac Revolving Credit Facility [Member]
Debt Disclosure [Line Items]
Debt Instrument Margin Rate						2.25%
If Leverage Ratio Is Greater Than Three Point Five [Member] | London Interbank Offered Rate (LIBOR) [Member] | Mid Pac Term Loan [Member]
Debt Disclosure [Line Items]
Debt Instrument Margin Rate						2.50%
If Leverage Ratio Is Greater Than Three Point Five [Member] | Base Rate [Member] | Mid Pac Revolving Credit Facility [Member]
Debt Disclosure [Line Items]
Debt Instrument Margin Rate						0.25%
If Leverage Ratio Is Greater Than Three Point Five [Member] | Base Rate [Member] | Mid Pac Term Loan [Member]
Debt Disclosure [Line Items]
Debt Instrument Margin Rate						0.50%
New Term Loans [Member] | Retail Credit Agreement [Member] | HIE Retail [Member]
Debt Disclosure [Line Items]
Term loan								$ 7,900,000
New Term Loans [Member] | Retail Credit Agreement [Member] | HIE Retail [Member] | Term Loan [Member]
Debt Disclosure [Line Items]
Prepayment fee percentage								1.00%
Mid Pac Credit Agreement [Member] | Revolving Credit Facility [Member]
Debt Disclosure [Line Items]
Line credit maximum borrowing amount			5,000,000
Mid Pac Credit Agreement [Member] | Secured Debt [Member]
Debt Disclosure [Line Items]
Line credit maximum borrowing amount			50,000,000
Mid Pac Petroleum, LLC [Member] | Mid Pac Credit Agreement [Member]
Debt Disclosure [Line Items]
Term loan			$ 55,000,000
Other Operating Income (Expense) [Member] | ABL Revolving Credit Facility [Member]
Debt Disclosure [Line Items]
Financing costs expensed		$ 1,800,000
June 30, 2015 [Member] | Retail Credit Agreement [Member] | Mid Pac Petroleum, LLC [Member]
Debt Disclosure [Line Items]
Debt Instrument, Covenant, Leverage Ratio Required, Maximum								5.50
September 30, 2015 [Member] | Retail Credit Agreement [Member] | Mid Pac Petroleum, LLC [Member]
Debt Disclosure [Line Items]
Debt Instrument, Covenant, Leverage Ratio Required, Maximum								5.25
December 31, 2015 [Member] | Retail Credit Agreement [Member] | Mid Pac Petroleum, LLC [Member]
Debt Disclosure [Line Items]
Debt Instrument, Covenant, Leverage Ratio Required, Maximum								5.00
2015 Fiscal Year [Member] | Retail Credit Agreement [Member] | HIE Retail [Member]
Debt Disclosure [Line Items]
Debt Instrument, Covenant, Leverage Ratio Required, Maximum								5.00
2016 Fiscal Year [Member] | Retail Credit Agreement [Member] | Mid Pac Petroleum, LLC [Member]
Debt Disclosure [Line Items]
Debt Instrument, Covenant, Leverage Ratio Required, Maximum								4.75
2016 Fiscal Year [Member] | Retail Credit Agreement [Member] | HIE Retail [Member]
Debt Disclosure [Line Items]
Debt Instrument, Covenant, Leverage Ratio Required, Maximum								4.75
2017 Fiscal Year [Member] | Retail Credit Agreement [Member] | Mid Pac Petroleum, LLC [Member]
Debt Disclosure [Line Items]
Debt Instrument, Covenant, Leverage Ratio Required, Maximum								4.25
2017 Fiscal Year [Member] | Retail Credit Agreement [Member] | HIE Retail [Member]
Debt Disclosure [Line Items]
Debt Instrument, Covenant, Leverage Ratio Required, Maximum								4.5
2018 Fiscal Year [Member] | Retail Credit Agreement [Member] | Mid Pac Petroleum, LLC [Member]
Debt Disclosure [Line Items]
Debt Instrument, Covenant, Leverage Ratio Required, Maximum								4.00
2018 Fiscal Year [Member] | Retail Credit Agreement [Member] | HIE Retail [Member]
Debt Disclosure [Line Items]
Debt Instrument, Covenant, Leverage Ratio Required, Maximum								4.25
2019 Fiscal Year [Member] | Retail Credit Agreement [Member] | Mid Pac Petroleum, LLC [Member]
Debt Disclosure [Line Items]
Debt Instrument, Covenant, Leverage Ratio Required, Maximum								3.50
2019 Fiscal Year, and at all times thereafter [Member] | Retail Credit Agreement [Member] | HIE Retail [Member]
Debt Disclosure [Line Items]
Debt Instrument, Covenant, Leverage Ratio Required, Maximum								4
2020 fiscal Year, and all times thereafter [Member] | Retail Credit Agreement [Member] | Mid Pac Petroleum, LLC [Member]
Debt Disclosure [Line Items]
Debt Instrument, Covenant, Leverage Ratio Required, Maximum								3.25