Investments in and Advances to Joint Ventures - Condensed Combined Financial Information of Company's Unconsolidated Joint Venture Investments (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Condensed Combined Balance Sheets
Land	$ 881,360	$ 881,397
Buildings	3,289,988	3,277,440
Fixtures and tenant improvements	493,371	491,312
Total real estate rental property	4,664,719	4,650,149
Less: Accumulated depreciation	(1,323,390)	(1,289,148)
Real estate rental property, net	3,341,329	3,361,001
Construction in progress and land	62,250	59,663
Total real estate assets, net	3,403,579	3,420,664
Other assets, net	101,614	108,631
Total assets	4,445,081	4,093,622
Mortgage debt	54,210	94,874
Total liabilities	2,477,603	2,112,144
Total liabilities and equity	4,445,081	4,093,622
Company's share of accumulated equity	74,165	186,247
Redeemable preferred equity, net	93,909	112,589
Basis differentials	7,518	(6,864)
Deferred development fees, net of portion related to the Company's interest	(1,505)	(2,452)
Amounts payable to the Company	4,896	4,975
Investments in and Advances to Joint Ventures, net	178,983	294,495
Unconsolidated Joint Ventures [Member]
Condensed Combined Balance Sheets
Land	556,291	895,427
Buildings	1,687,612	2,583,053
Fixtures and tenant improvements	154,278	233,303
Total real estate rental property	2,398,181	3,711,783
Less: Accumulated depreciation	(548,541)	(949,879)
Real estate rental property, net	1,849,640	2,761,904
Construction in progress and land	52,603	58,855
Total real estate assets, net	1,902,243	2,820,759
Cash and restricted cash	59,184	109,260
Receivables, net	22,442	37,191
Other assets, net	105,457	147,129
Total assets	2,089,326	3,114,339
Mortgage debt	1,434,981	1,640,146
Notes and accrued interest payable to the Company	4,896	4,975
Other liabilities	97,384	142,754
Total liabilities	1,537,261	1,787,875
Redeemable preferred equity – SITE Centers	218,315	217,871
Accumulated equity	333,750	1,108,593
Total liabilities and equity	$ 2,089,326	$ 3,114,339