Organization and Summary of Significant Accounting Policies (Correction of Immaterial Errors) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2011
Book charges associated with deferred tax assets	$ 2,756	$ 4,728
Gross deferred tax assets	11,421	14,188
Income tax benefit	(58)	(800)	7,034
Correction of Immaterial Errors
Book charges associated with deferred tax assets					10,350
Decrease of the valuation allowance related to deferred tax assets			10,350
Review of Realizability of Deferred Tax Assets
Gross deferred tax assets				3,104	3,104	3,104
Understatement of deferred income tax benefit				3,121	3,372
Understatement of net deferred tax assets				6,493		6,493
Income tax benefit			6,493
Review of Realizability of Remaining Deferred Tax Assets
Income tax benefit			$ 1,178