Business Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenue	$ 52,947	$ 49,186
Expenses	(13,241)	(11,976)
Income from real estate	39,706	37,210
Interest expense and amortization of deferred debt costs	(11,467)	(11,717)
General and administrative	(4,680)	(3,404)
Acquisition related costs	(163)	0
Predevelopment expenses	(503)	(2,349)
Subtotal	22,893	19,740
Depreciation and amortization of deferred leasing costs	(10,180)	(16,352)
Change in fair value of derivatives	(2)	10
Net Income	12,711	3,398
Capital investment	13,888	5,064
Total assets	1,204,597	1,194,332	1,198,675
Shopping Centers
Segment Reporting Information [Line Items]
Revenue	39,819	36,047
Expenses	(9,490)	(7,755)
Income from real estate	30,329	28,292
Interest expense and amortization of deferred debt costs	0	0
General and administrative	0	0
Acquisition related costs	(163)
Predevelopment expenses	0	0
Subtotal	30,166	28,292
Depreciation and amortization of deferred leasing costs	(6,897)	(6,829)
Change in fair value of derivatives	0	0
Net Income	23,269	21,463
Capital investment	10,732	3,499
Total assets	895,510	889,782
Mixed-Use Properties
Segment Reporting Information [Line Items]
Revenue	13,113	13,108
Expenses	(3,751)	(4,221)
Income from real estate	9,362	8,887
Interest expense and amortization of deferred debt costs	0	0
General and administrative	0	0
Acquisition related costs	0
Predevelopment expenses	(503)	(2,349)
Subtotal	8,859	6,538
Depreciation and amortization of deferred leasing costs	(3,283)	(9,523)
Change in fair value of derivatives	0	0
Net Income	5,576	(2,985)
Capital investment	3,156	1,565
Total assets	293,919	295,008
Corporate and Other
Segment Reporting Information [Line Items]
Revenue	15	31
Expenses	0	0
Income from real estate	15	31
Interest expense and amortization of deferred debt costs	(11,467)	(11,717)
General and administrative	(4,680)	(3,404)
Acquisition related costs	0
Predevelopment expenses	0	0
Subtotal	(16,132)	(15,090)
Depreciation and amortization of deferred leasing costs	0	0
Change in fair value of derivatives	(2)	10
Net Income	(16,134)	(15,080)
Capital investment	0	0
Total assets	$ 15,168	$ 9,542