Defined Contribution Plan, Employers Matching Contribution, Vesting Period

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Maximum number of common share employee is eligible for each performance unit.

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- Definition

Share-Based Compensation Arrangement By Share-Based Compensation Award, Company Match Contribution, Employee Stock Purchase Plan, Percent

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- Definition

Stock options granted vesting rate.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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-Publisher FASB
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- Definition

Amount of cost for defined contribution plan.

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- Definition

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

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No definition available.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The number of positions eliminated during the period as a result of restructuring activities.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

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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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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- Definition

An excess of the fair value of the modified award over the fair value of the award immediately before the modification.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

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Stock-Based Compensation and Benefit Plans - Additional Information (Detail) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended
	Jan. 28, 2018 USD ($) Employee shares	Jan. 28, 2018 USD ($) $ / shares shares	Jan. 29, 2017 USD ($) $ / shares	Jan. 31, 2016 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted vesting rate		25.00%
Stock-based compensation expense		$ 17.6	$ 16.8	$ 10.4
Unrecognized compensation cost for all stock-based compensation plans	$ 44.6	$ 44.6	$ 35.8
Unrecognized compensation cost for all stock-based compensation plans, recognition period		2 years	2 years 2 months 12 days
Common stock per performance share unit	2	2
Weighted-average grant date fair value of granted shares (in dollars per share) \| $ / shares		$ 16.88	$ 22.39	$ 19.76
ESPP participant contribution, company match percent		33.33%
Shares issues for ESPP \| shares		100,000
Vesting period		2 years
Company contributions		$ 5.2	$ 3.2
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Participant contribution, company match percent		50.00%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Participant contribution, company match percent		75.00%
Common Stock \| 2014 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum shares available under plan \| shares	13,800,000	13,800,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		4 years
Expiration period		7 years
Unrecognized compensation cost for all stock-based compensation plans	$ 11.7	$ 11.7
Unrecognized compensation cost for all stock-based compensation plans, recognition period		2 years 7 months 6 days
Performance-Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		1 year
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum shares available under plan \| shares	6,000,000.0	6,000,000.0
Facility closing \| ivivva
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		$ 0.1
Number of employees impacted \| Employee	250
Incremental compensation cost	$ 10.1