Related-Party Transactions (Details) (USD $)	2 Months Ended	12 Months Ended	2 Months Ended	1 Months Ended	2 Months Ended	1 Months Ended		3 Months Ended							10 Months Ended	12 Months Ended		10 Months Ended	12 Months Ended			2 Months Ended	3 Months Ended		10 Months Ended	12 Months Ended		0 Months Ended		1 Months Ended			10 Months Ended	12 Months Ended		1 Months Ended
	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2012 Gasoline Stations	Oct. 30, 2012 LGC Omnibus Agreement	Dec. 31, 2012 LGC Omnibus Agreement	Oct. 30, 2012 Predecessor	May 31, 2009 Predecessor	Sep. 30, 2012 Predecessor	Jun. 30, 2012 Predecessor	Mar. 31, 2012 Predecessor	Dec. 31, 2011 Predecessor	Sep. 30, 2011 Predecessor	Jun. 30, 2011 Predecessor	Mar. 31, 2011 Predecessor	Oct. 30, 2012 Predecessor	Dec. 31, 2011 Predecessor	Dec. 31, 2010 Predecessor	Oct. 30, 2012 Predecessor Gasoline Stations	Dec. 31, 2011 Predecessor Gasoline Stations	Dec. 31, 2010 Predecessor Gasoline Stations	Dec. 31, 2011 Predecessor Affiliated entities	Dec. 31, 2012 Predecessor Affiliated entities Gasoline Stations	Sep. 30, 2012 Predecessor Affiliated entities Gasoline Stations	Sep. 30, 2011 Predecessor Affiliated entities Gasoline Stations	Oct. 31, 2012 Predecessor Affiliated entities Gasoline Stations	Dec. 31, 2011 Predecessor Affiliated entities Gasoline Stations	Dec. 31, 2010 Predecessor Affiliated entities Gasoline Stations	Sep. 30, 2012 Predecessor Individuals	Feb. 28, 2011 Predecessor Individuals	Sep. 30, 2012 Predecessor Individuals	Feb. 28, 2011 Predecessor Individuals	Dec. 31, 2008 Predecessor Individuals	Oct. 31, 2012 Predecessor Individuals	Dec. 31, 2011 Predecessor Individuals	Dec. 31, 2010 Predecessor Individuals	Dec. 31, 2008 Predecessor Individuals Maximum
Related-Party Transactions
Amounts due from Affiliates	$ 8,112,000	$ 8,112,000									$ 5,854,000					$ 5,854,000	$ 5,418,000				$ 5,900,000
Mandatorily Redeemable Preferred Equity
Outstanding balance											12,000,000					12,000,000																12,000,000
Termination fee																														1,000,000
Coupon rate (as a percent)																												15.00%	12.00%							18.00%
Initial coupon rate (as a percent)																																9.00%
Increase in coupon rate (as a percent)																																3.00%
Interest rate in the event of default (as a percent)																															18.00%	24.00%
Interest expense	1,926,000					1,088,000		3,388,000	3,501,000	3,392,000	2,439,000	3,109,000	4,772,000	1,762,000	11,369,000	12,082,000	15,691,000																1,300,000	1,400,000	1,700,000
Payment to cancel the mandatorily redeemable preferred equity																														13,000,000
Payment to cancel the mandatorily redeemable preferred equity pertaining to face value	12,000,000																													12,000,000
Initial management fee, per month				420,000
Initial management fee, per gallon per month of motor fuel distributed				0.0025
Management Fees
Management fees					1,100,000																												3,700,000	2,300,000	0
Note Receivable
Secured promissory note received from related party							200,000
Fixed interest rate (as a percent)							7.00%
Unpaid principal balance											200,000					200,000
Management fees					1,100,000
Operating Leases
Rental income under operating leases agreements	3,228,000					720,000		2,090,000	1,047,000	1,851,000	2,323,000	1,959,000	1,758,000	1,752,000	5,708,000	7,792,000	7,169,000					3,200,000	2,005,000	1,959,000	5,700,000	7,800,000	7,200,000
Rental expenses under operating leases agreements	$ 2,045,000	$ 180,000	$ 2,000,000			$ 1,237,000		$ 3,464,000	$ 2,795,000	$ 2,067,000	$ 2,416,000	$ 2,458,000	$ 2,385,000	$ 2,143,000	$ 9,563,000	$ 9,402,000	$ 6,422,000	$ 9,400,000	$ 9,200,000	$ 6,300,000		$ 200,000			$ 600,000	$ 600,000	$ 600,000