Income Taxes (Narrative) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended			12 Months Ended			12 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Federal [Member]	Dec. 31, 2023 Federal [Member]	Dec. 31, 2011 Federal [Member]	Dec. 31, 2012 California [Member]	Dec. 31, 2011 California [Member]	Dec. 31, 2012 State [Member]	Dec. 31, 2011 State [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards				$ 41,100		$ 42,900	$ 215,500	$ 215,500	$ 20,000	$ 20,000
Operating loss carryforwards, expiration dates				2023			2019		2028
Operating loss carryforwards estimated to expire				22,000					18,700
Operating loss carryforwards, valuation allowance				1,800	1,300
Unrecognized tax benefits	32,647	23,061	23,061
Unrecognized tax benefits with effective tax rate impact	12,200
Unrecognized tax benefits resulting in adjustment to deferred tax assets	20,400
Unrecognized tax benefits, income tax penalties and interest accrued	200	500	(26)
Increase in unrecognized tax benefits following uncertain tax positions evaluation	$ 24,000