Litigation (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	1 Months Ended		3 Months Ended
	Mar. 31, 2013	Nov. 30, 2010 Purported Stockholder Derivative and Securities Class Action Lawsuits [Member]	Apr. 08, 2013 Subsequent Event [Member]	Aug. 31, 2008 U. S. District Court in the Central District of California [Member] Purported Stockholder Derivative and Securities Class Action Lawsuits [Member] claims	Aug. 31, 2008 Superior Court of the State of California [Member] Purported Stockholder Derivative and Securities Class Action Lawsuits [Member] claims
Loss Contingencies [Line Items]
Purported stockholder derivative and securities class action lawsuits				5	1
Litigation Settlement, Amount		$ (10.0)
Stipulation of settlement, insurance carriers payment			2.5
Stipulation of settlement, payment to plaintiff			0.5
Stipulation of settlement, payment to plaintiff, warrants	250,000		250,000
Stipulation of settlement, payment to plaintiff, warrants, term	5 years		5 years
Litigation Settlement, Expense	$ 2.8