Debt Obligations - Additional Information (Detail) (USD $)	1 Months Ended	6 Months Ended			1 Months Ended	6 Months Ended	1 Months Ended
	May 31, 2010	Jun. 30, 2012	Dec. 31, 2011	Jul. 26, 2007	Feb. 29, 2012 Regional Enterprises, Inc. Lease Agreements Vehicle	Jun. 30, 2012 Regional Enterprises, Inc. Lease Agreements Transaction 02 Vehicle	Nov. 30, 2010 Ownership scenario under Seventh Amendment Minimum	Nov. 30, 2010 Ownership scenario under Seventh Amendment Messrs. Imad K. Anbouba and Carter R. Montgomery
Debt Instrument [Line Items]
Amount of borrowings from RB International Finance (USA) LLC		$ 2,150,000	$ 2,610,000	$ 5,000,000
RZB Note , variable interest rate		5.80%
RZB Note, maturity date	May 31, 2014
Requirement to submit annual financial statements of Regional after year end (for annual financial statements after September 30, 2010)	90 days
Minimum ownership of GP required under RZB Note to be held by Messrs. Anbouba and Montgomery		2.00%					51.00%
Minimum ownership of Central Energy, LLC under RZB Note required to be held by Messrs. Anbouba and Montgomery		100.00%						100.00%
Number of tractors sold					6	27
Proceeds from the sale of tractors					97,000	507,000
Proceeds from the sale of tractors utilize for working capital requirements						$ 274,000