Organization and Summary of Significant Accounting Policies Investment in Limited Partnership (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Investment in Limited Partnership [Abstract]
Distributions received from limited partnership	$ 10,737	$ 0

Cash inflow received as distributions, returns of capital, or sale proceeds from partnership interests held for investment purposes.

No definition available.

Name:	us-gaap_ProceedsFromLimitedPartnershipInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration