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Other Employee Benefit Plans	12 Months Ended
Other Employee Benefit Plans	Jan. 31, 2017
Defined Contribution Pension And Other Postretirement Plans Disclosure [Abstract]
Other Employee Benefit Plans	NOTE 11 – OTHER EMPLOYEE BENEFIT PLANS The Company maintains an Employee Savings Plan under Section 401(k) of the Internal Revenue Code. In addition, the Company maintains defined contribution employee benefit plans for its employees located in Switzerland. Company contributions and expenses of administering the plans were $3.1 million, $2.9 million and $3.3 million in fiscal 2017, 2016 and 2015, respectively. The Company maintains a defined contribution Deferred Compensation Plan (also known as a supplemental employee retirement plan or SERP). The SERP provides eligible executives with supplemental retirement benefits in addition to amounts received under the Company’s other retirement plans. The Company makes a matching contribution, up to either 5% or 10% of the executive’s salary, which vests in equal annual installments over five years. During fiscal 2017, 2016 and 2015, the Company recorded expenses related to the SERP of $0.9 million, which includes $0.3 million related to the retirement of the Company’s former Vice Chairman and Chief Operating Officer, $0.4 million and $0.5 million, respectively.