Organization and Summary of Significant Accounting Policies (Recent Accounting Pronouncements) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Restricted cash	$ 70,261	$ 40,272
Retained earnings	286,623	256,301
Distributions received from joint ventures	5,730	1,880	$ 1,167
Impact from adoption of ASU 2018-02	59
ASU 2016-15
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Distributions received from joint ventures		(1,900)	(1,200)
Distributions received from joint ventures		1,900	$ 1,200
ASU 2018-15
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Capitalized costs	900	$ 0
ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings	1,300
ASU 2016-02 | Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating liabilities	4,000
ROU assets	4,000
ASU 2016-02 | Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating liabilities	5,000
ROU assets	$ 5,000