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- Definition

Defined contribution plan employer maximum matching contribution percent of match.

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Defined contribution plan employers matching contribution vesting period.

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Other defined contribution plan contribution and administrative expenses.

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- Definition

The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount included in accumulated other comprehensive (income) loss for prior service cost (credit) expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position.

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Amount of contributions expected to be received by defined benefit plan from employer in next fiscal year following latest fiscal year.

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Amount of cost for defined contribution plan.

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Percentage employer matches of the employee's percentage contribution matched.

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Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

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Description of defined contribution pension and other postretirement plans. Includes, but is not limited to, plan utilized, employee group covered, and employer matching contributions.

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Pension and Retirement Savings Plan - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Contributions and expenses of administering the other defined contribution plans	$ 0.6	$ 2.0	$ 2.1
Estimated prior service cost to be amortized in next fiscal year from accumulated other comprehensive income into net periodic pension cost	0.1
Swiss
Defined Benefit Plan Disclosure [Line Items]
Expected future contribution to defined benefit plan	$ 1.3
SERP
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan employers matching contribution, vesting period	5 years
Company's contribution to defined contribution plans	$ 0.7	0.6	0.9
Defined contribution plan, description	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.
Common Stock \| SERP
Defined Benefit Plan Disclosure [Line Items]
Percentage of company's matching contribution with respect to each participant's contribution	20.00%
Former Vice Chairman and Chief Operating Officer \| SERP
Defined Benefit Plan Disclosure [Line Items]
Compensation related expenses associated with retirement	$ 0.3
401(k) Savings Plan
Defined Benefit Plan Disclosure [Line Items]
Percentage of company's matching contribution with respect to each participant's contribution	50.00%
Percentage of matching contribution with respect to each participant's contribution	1.00%
Maximum percentage contribution by employee	6.00%
Percentage of company's maximum matching contribution	3.00%
Defined contribution plan employers matching contribution, vesting period	3 years
Company's contribution to defined contribution plans	$ 1.1	$ 1.1	$ 1.0