CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
REVENUE
Rental income	$ 156,055	$ 178,492	$ 186,421
Total revenue	214,754	241,017	248,674
EXPENSES
Property operating	28,705	19,700	21,510
Real estate taxes	42,446	45,653	43,681
Depreciation and amortization	226,675	262,171	177,119
General and administrative	34,788	27,902	17,469
Litigation charge			19,000
Provision for doubtful accounts	257	158	269
Acquisition-related expenses			73
Total expenses	332,871	355,584	279,121
Gain on sale of real estate	96,165	11,447
Gain on sale of interests in unconsolidated joint ventures		60,302
Equity in (loss) income of unconsolidated joint ventures	(10,448)	(7,788)	4,646
Interest and other income	7,886	877	266
Interest expense	(90,020)	(70,112)	(63,591)
Change in fair value of interest rate cap	(23)	(701)	(1,378)
Loss before income taxes	(114,557)	(120,542)	(90,504)
Provision for income taxes	(321)	(271)	(505)
Net loss	(114,878)	(120,813)	(91,009)
Net loss attributable to non-controlling interests	41,406	47,059	39,451
Net loss attributable to Seritage	(73,472)	(73,754)	(51,558)
Preferred dividends	(4,903)	(245)
Net loss attributable to Seritage common shareholders	$ (78,375)	$ (73,999)	$ (51,558)
Net loss per share attributable to Seritage Class A and Class C common shareholders - Basic	$ (2.20)	$ (2.19)	$ (1.64)
Net loss per share attributable to Seritage Class A and Class C common shareholders - Diluted	$ (2.20)	$ (2.19)	$ (1.64)
Weighted average Class A and Class C common shares outstanding - Basic	35,560	33,804	31,416
Weighted average Class A and Class C common shares outstanding - Diluted	35,560	33,804	31,416
Tenant Reimbursements [Member]
REVENUE
Revenue	$ 57,503	$ 62,525	$ 62,253
Management and Other Fee Income [Member]
REVENUE
Revenue	$ 1,196