Organization And Summary Of Significant Accounting Policies (Narrative) (Detail)	12 Months Ended
	Dec. 31, 2018 USD ($) Property Segment State $ / shares shares	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Provision for excise tax	$ 0	$ 0	$ 0
Impairment Of Assets	137,487,000	55,793,000	62,603,000
Line of credit facilities gross borrowings	65,000,000	309,000,000	290,000,000
Line of credit facilities gross repayments	$ 53,000,000	403,000,000	208,000,000
Number of properties | Property	27
Number of states where the properties operated | State	9
Interest in the Operating Partnership	89.50%
Amount available for distribution	$ 49,100,000
Closing share price | $ / shares	$ 5.94
Number of outstanding OP units held by limited partners | shares	8,272,635
Number of reportable segment | Segment	1
Percentage of consolidated revenue having no single tenants	10.00%
Cash and cash equivalents	$ 18,084,000	15,348,000	9,803,000
Tenant security deposits	2,300,000	2,400,000
Cash paid for interest including interest of discontinued operations	58,400,000	55,400,000	67,900,000
Capitalized interest	6,400,000	7,600,000	3,200,000
Accrued construction costs	$ 15,700,000	(8,300,000)	13,400,000
Revenue from tenant rent and other tenant-related activities	95.00%
Straight line rent adjustments	$ 2,000,000	2,700,000	2,600,000
Straight-line rent receivable	27,200,000	25,400,000
Account receivable included in accrued income	38,914,000	38,166,000
Goodwill	$ 5,249,000	5,249,000	5,249,000		$ 5,249,000
Amortization of above-market and below-market lease intangibles			100,000
Income tax benefit recognition criteria percentage threshold, minimum	50.00%
Net deferred tax assets	$ 16,700,000	18,000,000
Income Tax Expense (Benefit)	0	0	0
Deferred Costs, Leasing, Gross		5,100,000
Restricted Cash	14,361,000	18,605,000	20,062,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	32,445,000	33,953,000	29,865,000		$ 42,444,000
Fair value, Mortgage Loan Receivable	8,000,000
Accrued Income Receivable [Member]
Summary Of Significant Accounting Policies [Line Items]
Account receivable included in accrued income	$ 1,900,000	3,100,000
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Partnership investment, ownership interest	25.00%
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Partnership investment, ownership interest	50.00%
Metroplex Shopping Center [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of properties | Property	21
Power Center [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of properties | Property	4
Development Properties [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of properties | Property	2
Value of in-place lease intangibles [Member]
Summary Of Significant Accounting Policies [Line Items]
Amortization of in-place lease intangibles	$ 2,400,000	2,000,000	2,400,000
Above/(Below) Market Leases [Member]
Summary Of Significant Accounting Policies [Line Items]
Amortization of above-market and below-market lease intangibles	200,000	100,000
Wiregrass Commons [Member]
Summary Of Significant Accounting Policies [Line Items]
Loans Receivable with Fixed Rates of Interest	16,100,000			$ 17,000,000
Debt Instrument, Interest Rate, Stated Percentage				6.00%
Interest Income, Other	1,000,000	1,000,000	$ 700,000
Impairment Of Assets	8,100,000
Mortgage Loan [Member]
Summary Of Significant Accounting Policies [Line Items]
Debt Issuance Costs, Net	3,064,000	$ 3,400,000
Term Loans [Member]
Summary Of Significant Accounting Policies [Line Items]
Debt Issuance Costs, Net	$ 2,700,000