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Significant Accounting Policies - Summary of Distribution Center Lease Loss Liability Activity (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Feb. 02, 2019 | Feb. 03, 2018
Balance at beginning of fiscal year | $ 7,100 | $ 3,188
Lease loss liability remeasurements | (3,411) | (4,417)
Payments made under lease agreements | (2,249) | (1,699)
Payments received under sublease agreements | 1,138 | 1,003
Interest | 415 | 191
Balance at end of fiscal year | 9,815 | 7,100
Distribution Center Closures [Member] |  |
Balance at beginning of fiscal year | 2,585 |
Lease loss liability additions | 1,927 | 2,447
Lease loss liability remeasurements | (1,232) |
Payments made under lease agreements | (6,041) | (583)
Payments received under sublease agreements | 4,904 | 716
Interest | 34 | 5
Balance at end of fiscal year | $ 2,177 | $ 2,585

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- Definition Liability for lease losses. + References No definition available. + Details
Name: | rh_LiabilityForLeaseLosses
Namespace Prefix: | rh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Liability for lease losses additions. + References No definition available. + Details
Name: | rh_LiabilityForLeaseLossesAdditions
Namespace Prefix: | rh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Liability for lease losses interest. + References No definition available. + Details
Name: | rh_LiabilityForLeaseLossesInterest
Namespace Prefix: | rh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Liability for lease losses payments for under lease agreement. + References No definition available. + Details
Name: | rh_LiabilityForLeaseLossesPaymentsForUnderLeaseAgreement
Namespace Prefix: | rh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Liability for lease losses Payments received under sublease agreement. + References No definition available. + Details
Name: | rh_LiabilityForLeaseLossesPaymentsReceivedUnderSubleaseAgreement
Namespace Prefix: | rh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Liability for lease losses re-measurement. + References No definition available. + Details
Name: | rh_LiabilityForLeaseLossesReMeasurement
Namespace Prefix: | rh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=rh_DistributionCenterClosuresMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |