Credit Facilities - Additional Information (Detail) - USD ($)		1 Months Ended	3 Months Ended	6 Months Ended
	Jun. 28, 2017	Jun. 30, 2018	Aug. 04, 2018	Aug. 04, 2018	Feb. 03, 2018
Line Of Credit Facility [Line Items]
Outstanding revolving line of credit			$ 0	$ 0	$ 279,469,000
Loss on extinguishment of debt			917,000	$ 917,000
Revolving line of credit, interest rate description				Borrowings under the revolving line of credit are subject to interest, at the borrowers’ option, at either the bank’s reference rate or LIBOR (or, in the case of the revolving line of credit, the Bank of America “BA” Rate or the Canadian Prime Rate, as such terms are defined in the credit agreement, for Canadian borrowings denominated in Canadian dollars or the United States Index Rate or LIBOR for Canadian borrowings denominated in United States dollars) plus an applicable margin rate, in each case.
Fixed charge coverage ratio covenant, percentage of borrowing base				10.00%
Incremental borrowing available after maintaining fixed charge coverage ratio			392,800,000	$ 392,800,000
Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Agreement, date				Jun. 28, 2017
Revolving Credit Facility [Member]
Line Of Credit Facility [Line Items]
Outstanding revolving line of credit			0	$ 0
Availability under the revolving line of credit			437,800,000	437,800,000
Outstanding letters of credit			$ 12,800,000	$ 12,800,000
Revolving Credit Facility [Member] | Credit Agreement [Member] | Scenario, Plan Subject to Satisfaction of Conditions [Member]
Line Of Credit Facility [Line Items]
Increase in revolving line of credit	$ 200,000,000
Revolving Credit Facility [Member] | Credit Agreement [Member] | Maximum [Member]
Line Of Credit Facility [Line Items]
Availability under the revolving line of credit	600,000,000
Revolving Credit Facility [Member] | Credit Agreement [Member] | Maximum [Member] | Scenario, Plan Subject to Satisfaction of Conditions [Member]
Line Of Credit Facility [Line Items]
Line of credit	800,000,000
Revolving Credit Facility [Member] | Credit Agreement [Member] | Minimum [Member]
Line Of Credit Facility [Line Items]
Line of credit	600,000,000
Revolving Credit Facility [Member] | Credit Agreement [Member] | Restoration Hardware Canada, Inc. [Member]
Line Of Credit Facility [Line Items]
Availability under the revolving line of credit	10,000,000
LILO Term Loan Facility [Member]
Line Of Credit Facility [Line Items]
Outstanding revolving line of credit					$ 79,499,000
Loss on extinguishment of debt		$ 500,000
Prepayment penalties upon early extinguishment of debt		$ 0
LILO Term Loan Facility [Member] | Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 80,000,000
Line of credit facility, maturity date	Jun. 28, 2022