Income Taxes [Line Items]

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Operating Loss Carryforward, Expiration Year

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Tax Credit Carryforward, Expiration Year

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Unrecognized Tax Benefits Income Tax Penalties And Interest Expense (Benefit)

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

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- Definition

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards that are not subject to expiration dates.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards that are subject to expiration dates.

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Amount of deferred tax liability attributable to taxable temporary differences from undistributed earnings of subsidiary and other recognized entity not within country of domicile. Includes, but is not limited to, other basis differences.

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Amount of increase reasonably possible in the next twelve months for the unrecognized tax benefit.

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized.

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The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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- Definition

Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Income Taxes [Line Items]
Net deferred tax assets	$ 69,926,000	$ 66,476,000
Valuation allowance for certain other foreign and state net operating loss carryforwards	0
Cash and cash equivalents	206,575,000	395,635,000	$ 221,839,000	$ 358,260,000
Unrecognized tax benefit that, if recognized, would impact the effective tax rate	21,288,000	23,497,000
Recognized (benefit)/expense in interest and penalties	630,000	950,000	$ 1,038,000
Accrued amounts for payment of interest and penalties	3,440,000	2,810,000
Unrecognized tax benefits, lower bound	0
Unrecognized tax benefits, upper bound	911,000
U.S. Federal
Income Taxes [Line Items]
Net deferred tax assets	38,718,000	34,037,000
Net operating loss carryforwards, do not expire	11,218,000
Net operating loss carryforwards	31,304,000
Tax credit carryforwards	$ 5,925,000
U.S. Federal \| Earliest Tax Year
Income Taxes [Line Items]
Expiration date	2022
Tax credit expiration date	2022
U.S. Federal \| Latest Tax Year
Income Taxes [Line Items]
Expiration date	2042
Tax credit expiration date	2031
State and Local Jurisdiction
Income Taxes [Line Items]
Net deferred tax assets	$ 19,190,000	19,084,000
Foreign Jurisdictions
Income Taxes [Line Items]
Net deferred tax assets	12,018,000	$ 13,355,000
Net operating loss carryforwards, expire 2019 through 2029	7,710,000
Net operating loss carryforwards, do not expire	65,193,000
Cash and cash equivalents	153,700,000
Accumulated undistributed earning	$ 430,495,000
Foreign Jurisdictions \| Earliest Tax Year
Income Taxes [Line Items]
Expiration date	2022
Foreign Jurisdictions \| Latest Tax Year
Income Taxes [Line Items]
Expiration date	2031