CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
REVENUE
Rental income	$ 115,651	$ 116,202	$ 167,035
Management and other fee income	$ 1,032	$ 293	$ 1,598
Type of Revenue [Extensible List]	Management and Other Fee Income [Member]	Management and Other Fee Income [Member]	Management and Other Fee Income [Member]
Total revenue	$ 116,683	$ 116,495	$ 168,633
EXPENSES
Property operating	45,007	41,164	42,123
Real estate taxes	35,256	36,768	38,595
Depreciation and amortization	51,199	95,997	104,581
General and administrative	41,949	28,849	39,156
Total expenses	173,411	202,778	224,455
Gain on sale of real estate	221,681	88,555	71,104
Gain on sale of interests in unconsolidated entities		1,758
Impairment of real estate assets	(95,826)	(64,108)	0
Equity in loss of unconsolidated entities	(9,226)	(4,712)	(17,994)
Interest and other income	9,285	3,394	6,824
Interest expense	(107,975)	(91,316)	(94,519)
Loss before income taxes	(38,789)	(152,712)	(90,407)
Provision for income taxes	(196)	(252)	(196)
Net loss	(38,985)	(152,964)	(90,603)
Net loss attributable to non-controlling interests	10,836	47,938	31,206
Net loss attributable to Seritage	(28,149)	(105,026)	(59,397)
Preferred dividends	(4,900)	(4,900)	(4,900)
Net loss attributable to common shareholders	$ (33,049)	$ (109,926)	$ (64,297)
Net loss per share attributable to Seritage Class A common shareholders - Basic	$ (0.78)	$ (2.87)	$ (1.77)
Net loss per share attributable to Seritage Class A common shareholders - Diluted	$ (0.78)	$ (2.87)	$ (1.77)
Weighted average Class A common shares outstanding - Basic	42,393	38,298	36,413
Weighted average Class A common shares outstanding - Diluted	42,393	38,298	36,413