Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended						1 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Federal	Dec. 31, 2012 California	Dec. 31, 2012 California Minimum	Dec. 31, 2012 California Maximum	Jan. 31, 2013 Income Taxes	Dec. 31, 2012 NABCO Inventories
Income Taxes [Line Items]
Total income tax expense (benefit) from continuing operations	$ 600,000	$ 2,600,000
Statutory federal income tax rate	34.00%	34.00%
Cash paid for income taxes	300	500
Uncertain tax matters	0	400,000						400,000
Income tax refund requested	24,800,000
IRS determined tax liability for 2005 AMT	2,600,000
Company determined tax liability for 2005 AMT	400,000
Accrued interest on company determined tax liability for 2005 AMT	30,000
Payment to IRS	289,000	484,000					400,000
Net operating loss carry forwards			886,900,000	980,000,000
Net operating loss expiration period			20 years		10 years	20 years
Net operating loss carry forwards expiration year			2027	2017
Deferred tax asset valuation allowance	373,681,000	408,965,000
Deferred tax liabilities	$ 7,000	$ 81,000