Business Segments (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Revenue	$ 239,225	$ 225,207	$ 231,525
Expenses	(61,628)	(58,417)	(57,933)
Income from real estate	177,597	166,790	173,592
Interest expense, net and amortization of deferred debt costs	(45,424)	(46,519)	(41,834)
General and administrative	(20,252)	(19,107)	(20,793)
Depreciation and amortization of deferred leasing costs	(50,272)	(51,126)	(46,333)
Change in fair value of derivatives	0	0	(436)
Gain on sale of property	0	278	0
Net income (loss)	61,649	50,316	64,196
Capital investment	55,872	56,168	135,663
Total assets	1,746,761	1,645,572	1,618,340
Operating Segments | Shopping Centers
Segment Reporting Information [Line Items]
Revenue	169,681	161,854	167,888
Expenses	(35,784)	(35,198)	(36,119)
Income from real estate	133,897	126,656	131,769
Interest expense, net and amortization of deferred debt costs	0	0	0
General and administrative	0	0	0
Depreciation and amortization of deferred leasing costs	(28,843)	(30,891)	(29,112)
Change in fair value of derivatives			0
Gain on sale of property		278
Net income (loss)	105,054	96,043	102,657
Capital investment	12,639	15,203	33,968
Total assets	946,993	975,195	980,096
Operating Segments | Mixed-Use Properties
Segment Reporting Information [Line Items]
Revenue	69,544	63,353	63,637
Expenses	(25,844)	(23,219)	(21,814)
Income from real estate	43,700	40,134	41,823
Interest expense, net and amortization of deferred debt costs	0	0	0
General and administrative	0	0	0
Depreciation and amortization of deferred leasing costs	(21,429)	(20,235)	(17,221)
Change in fair value of derivatives			0
Gain on sale of property		0
Net income (loss)	22,271	19,899	24,602
Capital investment	43,233	40,965	101,695
Total assets	777,709	643,503	625,183
Corporate
Segment Reporting Information [Line Items]
Revenue	0	0	0
Expenses	0	0	0
Income from real estate	0	0	0
Interest expense, net and amortization of deferred debt costs	(45,424)	(46,519)	(41,834)
General and administrative	(20,252)	(19,107)	(20,793)
Depreciation and amortization of deferred leasing costs	0	0	0
Change in fair value of derivatives			(436)
Gain on sale of property		0
Net income (loss)	(65,676)	(65,626)	(63,063)
Capital investment	0	0	0
Total assets	$ 22,059	$ 26,874	$ 13,061