Leases - Additional Information (Detail) $ in Thousands			3 Months Ended		6 Months Ended
	Jul. 06, 2015 Lease Option	Jun. 11, 2015 Property	Jun. 30, 2018 USD ($) ft² Property	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) ft² Property	Jun. 30, 2017 USD ($)	Nov. 30, 2018 Store	Oct. 31, 2018 Store	Aug. 31, 2018 Store	Jul. 07, 2015
Schedule Of Operating Leases Future Minimum Payments Receivable [Line Items]
Base rent paid by Sears Holdings and subsidiaries under master lease | $			$ 51	$ 51	$ 100	$ 100
Number of real estate properties acquisition exercised | Property					63
Gross leasable area | ft²			10,123,687		10,123,687
Number of terminated properties commenced or completed for redevelopment | Property					31
Number of terminated properties sold | Property			1		5
Net proceeds from sale of real estate | $					$ 134,599
Gain on sale of real estate | $					$ 76,018
Sears Holdings Corporation [Member]
Schedule Of Operating Leases Future Minimum Payments Receivable [Line Items]
Right to recapture property space			100.00%		100.00%
Number of real estate properties wholly-owned | Property		234
Net proceeds from sale of real estate | $			$ 11,400		$ 24,900
Gain on sale of real estate | $			2,800		4,900
Master Lease [Member]
Schedule Of Operating Leases Future Minimum Payments Receivable [Line Items]
Lease term	10 years
Number of options for renewal of lease | Option	3
Renewal period of leases	5 years
Final option renewal period	4 years
Base rent paid by Sears Holdings and subsidiaries under master lease | $					88,700	117,000
Number of renewal term that will be increased | Lease	2
Percentage of increase annual lease rent										2.00%
Straight-line rental income | $			$ (1,000)	$ 800	$ (400)	$ 1,800
Right to recapture property space			50.00%		50.00%
Number of real estate properties wholly-owned | Property					224
Lease termination, description					While the Company is permitted to exercise its recapture rights all at once or in stages as to any particular property, it is not permitted to recapture all or substantially all of the space subject to the recapture right at more than 50 properties under Master Lease during any lease year.
Number of real estate properties wholly-owned | Property					50
Master Lease [Member] | Sears Holdings Corporation [Member]
Schedule Of Operating Leases Future Minimum Payments Receivable [Line Items]
Number of options for renewal of lease | Option	1
Right to recapture property space			100.00%		100.00%
Number of real estate properties wholly-owned | Property					21
Lease termination, description					The lease termination payment is calculated as the greater of an amount specified at the time the Company entered into the Master Lease with Sears Holdings and an amount equal to 10 times the adjusted EBITDA attributable to such space within the Sears Holdings main store which is not attributable to the space subject to the separate 50% recapture right discussed above for the 12-month period ending at the end of the fiscal quarter ending immediately prior to recapturing such space.
Lease termination fees incurred | $					$ 57,100
Right to recapture property space exercised					100.00%
Number of real estate properties acquisition exercised | Property					16
Additional termination fees incurred | $					$ 43,800
Lease termination notice period					90 days
Percentage of reduction of fixed rent under master lease					20.00%
Master Lease [Member] | Sears Holdings Corporation [Member] | Lease Terminations [Member]
Schedule Of Operating Leases Future Minimum Payments Receivable [Line Items]
Base rent paid by Sears Holdings and subsidiaries under master lease | $			$ 10,700		$ 23,600
Number of unprofitable stores terminated | Property			56		56
Gross leasable area terminated | ft²			7,400,000		7,400,000
Lease termination fees paid | $			$ 20,000		$ 45,100
Number of unprofitable stores to terminate | Property			18		18
Gross leasable area | ft²			2,700,000		2,700,000
Total annual base rent, percentage			4.80%		4.80%
Number of terminated properties announced for redevelopment | Property			74		74
Master Lease [Member] | Sears Holdings Corporation [Member] | Lease Terminations [Member] | Scenario, Forecast [Member]
Schedule Of Operating Leases Future Minimum Payments Receivable [Line Items]
Number of stores, rent to be paid | Store							7	2	9