Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Additional Information (Detail)

v2.4.1.9
Commitments and Contingencies - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended 0 Months Ended
Jan. 31, 2015
Feb. 01, 2014
Feb. 02, 2013
Feb. 01, 2014
Feb. 02, 2013
Long-term Purchase Commitment [Line Items]          
Non-cancelable operating lease terms, minimum 3 years        
Non-cancelable operating lease terms, maximum 10 years        
Total rent expense under operating leases $ 159,245us-gaap_LeaseAndRentalExpense $ 138,086us-gaap_LeaseAndRentalExpense $ 115,755us-gaap_LeaseAndRentalExpense    
Contractual obligations related to commitments 34,521us-gaap_ContractualObligation        
Multi-Year Supply Chain [Member]          
Long-term Purchase Commitment [Line Items]          
Contractual obligations related to commitments       38,212us-gaap_UnrecordedUnconditionalPurchaseObligationPurchases
/ us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis
= us-gaap_SupplyCommitmentMember
6,222us-gaap_UnrecordedUnconditionalPurchaseObligationPurchases
/ us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis
= us-gaap_SupplyCommitmentMember
Retail Stores [Member]          
Long-term Purchase Commitment [Line Items]          
Minimum lease payments for stores to be opened in next fiscal year $ 184,376ulta_OperatingLeasesFutureMinimumPaymentsDueForStores
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= ulta_RetailStoresMember