CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
REVENUE
Rental income	$ 41,152	$ 48,167	$ 114,070	$ 139,526
Total revenue	56,593	64,048	159,640	187,339
EXPENSES
Property operating	6,348	4,311	20,122	13,985
Real estate taxes	12,199	11,335	32,797	35,707
Depreciation and amortization	49,830	61,059	134,048	170,293
General and administrative	8,338	5,272	24,808	16,639
Provision for doubtful accounts	87	68	257	119
Total expenses	76,802	82,045	212,032	236,743
Operating loss	(20,209)	(17,997)	(52,392)	(49,404)
Equity in loss of unconsolidated joint ventures	(2,266)	(3,686)	(7,006)	(4,226)
Interest and other income	1,162	352	2,298	472
Interest expense	(30,723)	(18,049)	(65,004)	(53,072)
Change in fair value of interest rate cap	(16)	(91)	(23)	(686)
Loss before income taxes	(52,052)	(39,471)	(122,127)	(106,916)
Provision for income taxes	(93)		(437)	(266)
Loss before gain on sale of real estate	(52,145)	(39,471)	(122,564)	(107,182)
Gain on sale of real estate	17,401	13,018	93,419	13,018
Gain on sale of interests in unconsolidated joint ventures		43,729		43,729
Net (loss) income	(34,744)	17,276	(29,145)	(50,435)
Net loss (income) attributable to non-controlling interests	12,528	(6,762)	10,486	19,892
Net (loss) income attributable to Seritage	(22,216)	10,514	(18,659)	(30,543)
Preferred dividends	(1,225)		(3,678)
Net (loss) income attributable to Seritage common shareholders	$ (23,441)	$ 10,514	$ (22,337)	$ (30,543)
Net (loss) income per share attributable to Seritage Class A and Class C common shareholders - Basic	$ (0.66)	$ 0.31	$ (0.63)	$ (0.91)
Net (loss) income per share attributable to Seritage Class A and Class C common shareholders - Diluted	$ (0.66)	$ 0.31	$ (0.63)	$ (0.91)
Weighted average Class A and Class C common shares outstanding - Basic	35,598	33,774	35,535	33,685
Weighted average Class A and Class C common shares outstanding - Diluted	35,598	33,841	35,535	33,685
Tenant Reimbursements [Member]
REVENUE
Revenue	$ 15,326	$ 15,881	$ 44,541	$ 47,813
Management and Other Fee Income [Member]
REVENUE
Revenue	$ 115		$ 1,029