Organization and Summary of Significant Accounting Policies Income tax disclosure (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Tax Contingency [Line Items]
effective tax rate before discrete items			38.70%	40.90%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate			35.00%	35.00%
Income Tax Expense (Benefit)	$ 3,406	$ 983	$ 3,967	$ 2,363