Income Taxes (Details 5) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
United States federal [Member]
Summary of operating loss carryforward
Operating loss carry forwards	$ 93,873
Operating loss carryforwards, Expiration periods	from 2021 through 2031
California State [Member]
Summary of operating loss carryforward
Operating loss carry forwards	308,409
Operating loss carryforwards, Expiration periods	from 2016 through 2031
States other than California [Member]
Summary of operating loss carryforward
Operating loss carry forwards	4,098
Operating loss carryforwards, Expiration periods	from 2012 through 2031
Foreign Jurisdiction [Member]
Summary of operating loss carryforward
Operating loss carry forwards	$ 1,595
Operating loss carryforwards, Expiration periods	do not expire until utilized