Incremental compensation expense from modifications.

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- Definition

Share based compensation arrangement by share based payment award award vesting percentage.

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Share-based compensation arrangement by share-based payment award, equity instruments other than options, target grant date fair value.

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- Definition

Share-based compensation arrangement by share-based payment award, equity instruments other than options target grant date fair value percentage.

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- Definition

Share-based compensation arrangement by share-based payment award termination date.

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Share based compensation arrangement by share based payment award threshold percentage.

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- Definition

Share based compensation arrangement by share based payment award unexercised vested options exercisable period.

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Share Based Compensation Arrangement By Share Based Payment Award Unrecognized Compensation Expenses Period For Recognition

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- Definition

Share based compensation arrangement by share based payment award vesting rights percentage on termination or resignation.

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No definition available.

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- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for option under share-based payment arrangement.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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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 difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Number of options outstanding, including both vested and non-vested options.

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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

Percentage of vesting of award under share-based payment arrangement.

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Stock-Based Compensation - Additional Information (Detail) - USD ($) $ in Millions		12 Months Ended
	Feb. 03, 2019	Feb. 01, 2020	Feb. 02, 2019	Feb. 03, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Incremental compensation expense from modification		$ 0.0	$ 0.0	$ 0.1
Stock option modification payable				$ 0.1
Options outstanding		1,890,955	2,337,316
Share Based Compensation Award Tranche One
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awards granted subsequent to offering vesting percentage on each of the first four anniversaries of the grant date		25.00%	25.00%	25.00%
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options outstanding		1,890,955
Unearned non-cash stock-based option compensation		$ 40.8
Unearned non-cash stock-based compensation expected to recognize as expense over period		2 years 6 months
Service-based awards, service period		The awards are expensed on a straight-line basis over the requisite service period.
Restricted Stock Issuances
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awards granted subsequent to offering vesting percentage on each of the first four anniversaries of the grant date		100.00%	100.00%
Unearned non-cash stock-based option compensation		$ 43.0
Unearned non-cash stock-based compensation expected to recognize as expense over period		2 years 6 months
Restricted stock, outstanding		40,000
Percentage of shares vested if change in control		100.00%
Restricted Stock Issuances \| Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Service-based awards, service period		3 years
Restricted Stock Issuances \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Service-based awards, service period		5 years
Restricted Stock Issuances \| Graded Quarter Vesting
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Service-based awards, vesting period		4 years
Performance Share Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unearned non-cash stock-based option compensation		$ 12.6
Unearned non-cash stock-based compensation expected to recognize as expense over period		2 years 3 months 18 days
Restricted stock, outstanding		80,951
Service-based awards, service period	3 years
Service-based awards, vesting period	3 years
Vesting percentage on employee termination or resignation	100.00%
Performance Share Units \| Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Target award threshold range	50.00%
Performance Share Units \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Target award threshold range	200.00%
Board of Directors \| Restricted Stock Issuances
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Service-based awards, vesting period		3 years
2006 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Plan termination date		Apr. 12, 2016
2006 Plan \| Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unexercised vested options, exercisable period		60 days
2006 Plan \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unexercised vested options, exercisable period		180 days
2013 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares available for grant equity awards		3,280,488
Make-Whole Long Term Incentive Award \| Michael O’Sullivan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Long-term incentive grant with target grant date fair value		$ 25.0
Make-Whole Long Term Incentive Award \| Michael O’Sullivan \| Time Based Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Long-term incentive grant with target grant date fair value percentage		50.00%
Make-Whole Long Term Incentive Award \| Michael O’Sullivan \| Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Long-term incentive grant with target grant date fair value percentage		50.00%
Long Term Incentive Award \| Michael O’Sullivan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Long-term incentive grant with target grant date fair value		$ 8.5
Long Term Incentive Award \| Michael O’Sullivan \| Time Based Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Long-term incentive grant with target grant date fair value percentage		25.00%
Long Term Incentive Award \| Michael O’Sullivan \| Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Long-term incentive grant with target grant date fair value percentage		25.00%
Long Term Incentive Award \| Michael O’Sullivan \| Performance Based Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Long-term incentive grant with target grant date fair value percentage		50.00%