Acquisitions - Wyoming Refining Company Acquisition (Details) - USD ($)		1 Months Ended	3 Months Ended								12 Months Ended
	Jul. 14, 2016	Jun. 30, 2016	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Apr. 01, 2015
Business Acquisition [Line Items]
Goodwill			$ 105,732,000				$ 41,327,000				$ 105,732,000	$ 41,327,000	$ 20,786,000
Acquisition and integration expense											5,294,000	2,006,000	11,687,000
Revenues											1,865,045,000	2,066,337,000	3,108,025,000
Net loss			$ 13,687,000	$ (27,761,000)	$ (13,088,000)	$ (18,673,000)	$ (66,836,000)	$ 14,740,000	$ 11,723,000	$ 462,000	(45,835,000)	$ (39,911,000)	$ (47,041,000)
Wyoming Refining Company
Business Acquisition [Line Items]
Payments to acquire businesses	$ 209,400,000
Goodwill	64,994,000
Acquisition and integration expense											700,000
Revenues											174,600,000
Net loss											$ 700,000
Other Long Term Assets | Wyoming Refining Company
Business Acquisition [Line Items]
Deposit to acquire businesses		$ 5,000,000
Convertible Debt | 5% Convertible Senior Notes due 2021
Business Acquisition [Line Items]
Debt instrument, face amount		$ 115,000,000			$ 115,000,000
Secured Debt | Wyoming Refining Company
Business Acquisition [Line Items]
Wyoming Refining Senior Secured Debt	(58,036,000)
Debt instrument, face amount	65,000,000
Refining
Business Acquisition [Line Items]
Goodwill														$ 13,500,000
Refining | Wyoming Refining Company
Business Acquisition [Line Items]
Goodwill	39,600,000
Logistics
Business Acquisition [Line Items]
Goodwill														$ 10,800,000
Logistics | Wyoming Refining Company
Business Acquisition [Line Items]
Goodwill	25,400,000
Revolving Credit Facility | Wyoming Refining Company
Business Acquisition [Line Items]
Wyoming Refining Senior Secured Debt	$ (10,100,000)