Segment Reporting Operating Activity Within Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Operating income (loss)	$ 25,715	$ 27,669	$ 26,423	$ 20,062	$ 16,415	$ 20,323	$ 22,995	$ 28,848	$ 99,869	$ 88,581	$ 113,685
Total segments' profit									246,054	223,454	234,761
Total Retail
Segment Reporting Information [Line Items]
Property revenue									94,662	88,280	107,604
Property expense									(27,983)	(27,374)	(30,633)
Operating income (loss)									66,679	60,906	76,971
Total Office
Segment Reporting Information [Line Items]
Property revenue									186,366	177,554	144,683
Property expense									(50,233)	(47,424)	(42,234)
Operating income (loss)									136,133	130,130	102,449
Total Multifamily
Segment Reporting Information [Line Items]
Property revenue									52,315	50,327	51,066
Property expense									(23,211)	(22,074)	(20,863)
Operating income (loss)									29,104	28,253	30,203
Total Mixed-Use
Segment Reporting Information [Line Items]
Property revenue									42,485	28,412	63,388
Property expense									(28,347)	(24,247)	(38,250)
Operating income (loss)									$ 14,138	$ 4,165	$ 25,138