Consolidated Provision (Benefit) for Income Taxes from Continuing Operations (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current:
Federal	$ 8	$ (8)	$ (4)
State	198	282	286
Current Income Tax Expense (Benefit), Total	206	274	282
Deferred:
Federal	3,649	4,425	1,887
State	(3,702)	1,411	526
Deferred income taxes	(53)	5,836	2,413
Provision for (benefit from) income taxes	$ 153	$ 6,110	$ 2,695