Commitments and Contingencies - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($) store Facility	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Other Commitments [Line Items]
Number of owned stores that have leases | Facility	23
Expense related to ground leases	$ 6,898	$ 4,578	$ 3,858
Property loss from catastrophe, net	2,110
Reinsurance recoverables, case basis	$ 2,250
Commitment To Acquire Retail Space
Other Commitments [Line Items]
Number of properties to be acquired | store	14
Other commitment	$ 190,222
Commitment To Acquire Retail Space With Joint Venture Partners
Other Commitments [Line Items]
Number of properties to be acquired | store	17
Other commitment	$ 88,203
Commitment To Acquire Retail Space With Joint Venture Partners, Expected To Close Next Fiscal Year
Other Commitments [Line Items]
Number of store acquisitions expected to close | store	14
Commitment To Acquire Retail Space With Joint Venture Partners, Expected To Close Year Two
Other Commitments [Line Items]
Number of store acquisitions expected to close | store	3
Commitment To Acquire Retail Space, Expected To Close Remainder Of Fiscal Year
Other Commitments [Line Items]
Other commitment	$ 141,294
Number of store acquisitions expected to close | store	10
Commitment To Acquire Retail Space, Expected To Close In Year Two
Other Commitments [Line Items]
Other commitment	$ 38,400
Number of store acquisitions expected to close | store	3
Commitment To Acquire Retail Space, Expected To Close After Year Two
Other Commitments [Line Items]
Other commitment	$ 10,528
Number of store acquisitions expected to close | store	1