Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended			1 Months Ended			6 Months Ended	12 Months Ended		1 Months Ended
	Jun. 30, 2011	Mar. 31, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2009	Dec. 31, 2011 Internal Revenue Service (IRS)	Jun. 30, 2012 State	Feb. 29, 2012 California State	Nov. 30, 2010 Tax Period November 2006 to July 27, 2007	Nov. 30, 2010 Tax Period December 2008	Jun. 30, 2012 Regional Enterprises, Inc.	Dec. 31, 2011 Regional Enterprises, Inc.	Jun. 30, 2012 Total amount accrued by Central	Dec. 31, 2011 Monthly Payment Tax Period November 2006 to July 27, 2007	Jan. 31, 2011 Monthly Payment Tax Period November 2006 to July 27, 2007
Income Tax Contingency [Line Items]
Income taxes, penalties and interest									$ 384,000	$ 198,000
Income taxes paid			36,000	143,000					60,000
Income taxes, penalties and interest monthly payments														20,000	40,000
Central allocated expenses to Regional		419,000			1,100,000
Accrued estimated taxes owed	(121,000)			(93,000)							157,000	157,000
Income tax penalties for the 2008 Tax Year and the 2009 Tax Year						2,500,000		137,000
Maximum penalty exposure							940,000
Accrued for penalty exposure													$ 1,122,000