Business Segments - Schedule of Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Real estate rental operations:
Revenue	$ 56,943	$ 59,750
Income from real estate	42,754	44,601
Interest expense, net and amortization of deferred debt costs	(9,594)	(11,067)
Depreciation and amortization of deferred leasing costs	(11,281)	(11,643)
General and administrative	(5,050)	(4,814)
Net Income	16,829	17,077
Capital investment	21,588	23,423
Total assets	1,644,840	1,545,828	$ 1,618,340
Operating Segments | Shopping Centers
Real estate rental operations:
Revenue	41,571	43,159
Income from real estate	32,649	33,471
Interest expense, net and amortization of deferred debt costs	0	0
Depreciation and amortization of deferred leasing costs	(7,386)	(7,282)
General and administrative	0	0
Net Income	25,263	26,189
Capital investment	4,202	4,613
Total assets	973,107	968,674
Operating Segments | Mixed-Use Properties
Real estate rental operations:
Revenue	15,372	16,591
Income from real estate	10,105	11,130
Interest expense, net and amortization of deferred debt costs	0	0
Depreciation and amortization of deferred leasing costs	(3,895)	(4,361)
General and administrative	0	0
Net Income	6,210	6,769
Capital investment	17,386	18,810
Total assets	640,122	566,163
Corporate and Other
Real estate rental operations:
Revenue	0	0
Income from real estate	0	0
Interest expense, net and amortization of deferred debt costs	(9,594)	(11,067)
Depreciation and amortization of deferred leasing costs	0	0
General and administrative	(5,050)	(4,814)
Net Income	(14,644)	(15,881)
Capital investment	0	0
Total assets	31,611	10,991
Real Estate
Real estate rental operations:
Expenses	(14,189)	(15,149)
Real Estate | Operating Segments | Shopping Centers
Real estate rental operations:
Expenses	(8,922)	(9,688)
Real Estate | Operating Segments | Mixed-Use Properties
Real estate rental operations:
Expenses	(5,267)	(5,461)
Real Estate | Corporate and Other
Real estate rental operations:
Expenses	$ 0	$ 0