Organization and Summary of Significant Accounting Policies (Intangible Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Intangible lease liabilities (included in other liabilities):
Below-market in-place leases	$ 41,554	$ 44,468
Less: accumulated amortization	(25,258)	(26,055)
Below-market in-place leases, net	16,296	18,413
Above-market in-place leases, net
Intangible lease assets (included in other assets):
Leases	15,175	16,583
Less: accumulated amortization	(9,239)	(9,299)
Leases, net	5,936	7,284
In-place leases, net
Intangible lease assets (included in other assets):
Leases	104,871	104,592
Less: accumulated amortization	(60,797)	(61,004)
Leases, net	$ 44,074	$ 43,588