Organization and Summary of Significant Accounting Policies (Error Correction, Narrative) (Details) - Senior Subordinated Notes [Member] - Convertible Senior Subordinated Notes due August 15, 2019, 4.25% [Member]	Dec. 31, 2012 USD ($)
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Aggregate principal amount	$ 287,500,000.0
Debt, interest rate (as a percent)	4.25%

Organization and Summary of Significant Accounting Policies (Error Correction, Narrative) (Details) - Senior Subordinated Notes [Member] - Convertible Senior Subordinated Notes due August 15, 2019, 4.25% [Member]

Dec. 31, 2012

USD ($)

Error Corrections and Prior Period Adjustments Restatement [Line Items]

Aggregate principal amount

$ 287,500,000.0

Debt, interest rate (as a percent)

4.25%