Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Debt - Schedule of Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 21, 2017	Dec. 31, 2016	Jun. 30, 2016
Debt Instrument [Line Items]
Principal amount of long-term debt	$ 415,000		$ 400,420
Less: unamortized discount and deferred financing costs	(30,188)		(30,024)
Total debt, net of unamortized debt discount	384,812		370,396
Less current maturities	0		(20,286)
Long-term debt, net of current maturities and unamortized discount	384,812		350,110
Hawaii Retail Credit Agreement
Debt Instrument [Line Items]
Principal amount of long-term debt	$ 0		95,319
5% Convertible Senior Notes due 2021
Debt Instrument [Line Items]
Debt instrument, interest rate	5.00%			5.00%
7.75% Senior Secured Note due 2025
Debt Instrument [Line Items]
Debt instrument, interest rate	7.75%
Tranche B Loan
Debt Instrument [Line Items]
Principal amount of long-term debt	$ 0		60,361
Par Wyoming Holdings Term Loan
Debt Instrument [Line Items]
Principal amount of long-term debt	0		67,325
Wyoming Refining Senior Secured Term Loan
Debt Instrument [Line Items]
Principal amount of long-term debt	0		55,715
Wyoming Refining Senior Secured Revolver
Debt Instrument [Line Items]
Principal amount of long-term debt	0		6,700
Convertible Debt \| 5% Convertible Senior Notes due 2021
Debt Instrument [Line Items]
Principal amount of long-term debt	115,000		$ 115,000
Less: unamortized discount and deferred financing costs	$ (19,500)
Debt instrument, interest rate	5.00%		0.50%
Senior Notes \| 7.75% Senior Secured Note due 2025
Debt Instrument [Line Items]
Principal amount of long-term debt	$ 300,000	$ 300,000	$ 0
Debt instrument, interest rate	7.75%	7.75%