Environmental Liabilities, Asset Retirement Obligations and Renewable Identification Numbers (RINs) (Details) (USD $)	3 Months Ended	12 Months Ended	0 Months Ended
	Mar. 31, 2015	Dec. 31, 2012 item	Jun. 30, 2010 item	Dec. 31, 2014	Sep. 30, 2010	Mar. 31, 2012	Nov. 30, 2007	Jan. 07, 2015	Jan. 14, 2015
Changes in environmental liabilities during the period
Balance at the beginning of the period	$ 37,563,000
Additions	38,980,000
Payments	(1,033,000)
Dispositions	(67,000)
Other Adjustments	(172,000)
Balance at the end of the period	75,271,000
Environmental liabilities
Current portion	3,085,000			3,101,000
Long-term portion	72,186,000			34,462,000
Total environmental liabilities	75,271,000
Asset Retirement Obligations
Total assets retirement obligations	5,700,000			3,800,000
Renewable Identification Numbers (RINs)
Settlement period of RVO	1 year
RIN Deficiency	300,000			300,000
ExxonMobil Gasoline Stations
Environmental Liabilities
Assumed environmental liabilities, recorded on an undiscounted basis					30,000,000
Mutual Oil
Environmental Liabilities
Number of gasoline stations acquired		6
Assumed environmental liabilities, recorded on an undiscounted basis		600,000
Retail Gasoline Stations
Changes in environmental liabilities during the period
Balance at the beginning of the period	35,792,000
Additions	36,080,000
Payments	(1,017,000)
Dispositions	(67,000)
Other Adjustments	(172,000)
Balance at the end of the period	70,616,000
Environmental liabilities
Total environmental liabilities	70,616,000
Terminals
Changes in environmental liabilities during the period
Balance at the beginning of the period	1,771,000
Additions	2,900,000
Payments	(16,000)
Balance at the end of the period	4,655,000
Environmental liabilities
Total environmental liabilities	4,655,000
Alliance
Environmental Liabilities
Assumed environmental liabilities, recorded on an undiscounted basis						16,100,000
Newburgh Terminals Acquisition
Environmental Liabilities
Number of refined petroleum products terminals acquired			3
Assumed environmental liabilities, recorded on an undiscounted basis			1,500,000
Glenwood Landing and Inwood, New York Terminal Acquisitions
Environmental Liabilities
Assumed environmental liabilities, recorded on an undiscounted basis							1,200,000
Warren Equities Inc
Environmental Liabilities
Assumed environmental liabilities, recorded on an undiscounted basis								36,100,000
Asset Retirement Obligations
Total assets retirement obligations	1,800,000
Revere terminal
Environmental Liabilities
Assumed environmental liabilities, recorded on an undiscounted basis									$ 2,900,000