Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Schedule of Future Minimum Lease Payments Under Operating Leases (Detail)

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Commitments and Contingencies - Schedule of Future Minimum Lease Payments Under Operating Leases (Detail) (USD $)
In Thousands, unless otherwise specified
Jan. 31, 2015
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]  
2015 $ 214,479us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent
2016 218,879us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears
2017 207,223us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears
2018 189,683us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears
2019 173,111us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears
2020 and thereafter 599,542ulta_OperatingLeasesFutureMinimumPaymentsDueInFiveYearsAndThereafter
Total minimum lease payments $ 1,602,917us-gaap_OperatingLeasesFutureMinimumPaymentsDue