Investments in and Advances to Joint Ventures - Condensed Combined Financial Information of Company's Unconsolidated Joint Venture Investments (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Condensed Combined Balance Sheets
Land	$ 861,730	$ 873,548
Buildings	3,215,366	3,251,030
Fixtures and tenant improvements	450,636	448,371
Total real estate rental property	4,527,732	4,572,949
Less: Accumulated depreciation	(1,197,944)	(1,172,357)
Real estate rental property, net	3,329,788	3,400,592
Construction in progress and land	55,634	54,917
Total real estate assets, net	3,385,422	3,455,509
Other assets, net	111,510	96,554
Total assets	4,116,023	4,206,331
Mortgage debt	87,992	88,743
Total liabilities	2,063,057	2,133,329
Total liabilities and equity	4,116,023	4,206,331
Company's share of accumulated equity	132,270	145,786
Redeemable preferred equity, net	176,120	189,891
Basis differentials	(9,638)	(8,536)
Deferred development fees, net of portion related to the Company's interest	(2,531)	(2,700)
Amounts payable to the Company	6,501	5,182
Investments in and Advances to Joint Ventures, net	302,722	329,623
Unconsolidated Joint Ventures [Member]
Condensed Combined Balance Sheets
Land	973,154	1,004,289
Buildings	2,740,483	2,804,027
Fixtures and tenant improvements	216,739	221,412
Total real estate rental property	3,930,376	4,029,728
Less: Accumulated depreciation	(943,573)	(935,921)
Real estate rental property, net	2,986,803	3,093,807
Construction in progress and land	59,302	56,498
Total real estate assets, net	3,046,105	3,150,305
Cash and restricted cash	81,230	94,111
Receivables, net	36,871	44,702
Other assets, net	187,499	186,693
Total assets	3,351,705	3,475,811
Mortgage debt	2,183,450	2,212,503
Notes and accrued interest payable to the Company	6,501	5,182
Other liabilities	150,364	161,372
Total liabilities	2,340,315	2,379,057
Redeemable preferred equity – SITE Centers	263,105	274,493
Accumulated equity	748,285	822,261
Total liabilities and equity	$ 3,351,705	$ 3,475,811