Organization and Summary of Significant Accounting Policies (Gross Intangible Assets and Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Intangible lease liabilities (included in other liabilities):
Below-market in-place leases	$ 41,395	$ 41,554
Less: accumulated amortization	(25,357)	(25,258)
Below-market in-place leases, net	16,038	16,296
Above-market in-place leases, net
Intangible lease assets (included in Other assets):
Leases	15,456	15,175
Less: accumulated amortization	(9,404)	(9,239)
Leases, net	6,052	5,936
In-place leases, net
Intangible lease assets (included in Other assets):
Leases	109,558	104,871
Less: accumulated amortization	(61,344)	(60,797)
Leases, net	$ 48,214	$ 44,074