Organization and Summary of Significant Accounting Policies (Intangible Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Intangible lease liabilities (included in Other liabilities):
Below-market in-place leases	$ 44,468	$ 46,151
Less: accumulated amortization	(26,055)	(24,051)
Below market in-place leases, net	18,413	22,100
Above market in-place leases, net
Intangible lease assets (included in Other assets):
Leases	16,583	18,352
Less: accumulated amortization	(9,299)	(8,761)
Leases, net	7,284	9,591
In-place leases, net
Intangible lease assets (included in Other assets):
Leases	104,592	112,951
Less: accumulated amortization	(61,004)	(57,661)
Leases, net	$ 43,588	$ 55,290