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Reconciliation of Beginning and Ending Balances of Total Amounts of Gross Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Income Tax Disclosure [Abstract]
Balance at the beginning of the period	$ 22,259	$ 21,924	$ 21,406
Increases in tax positions for prior years	28	476	661
Decreases in tax positions for prior years	(3,178)	(51)	(101)
Increases in tax positions for current year	249	41	125
Lapse in statute of limitations	(413)	(131)	(167)
Balance at the end of the period	$ 18,945	$ 22,259	$ 21,924

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Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 10B
-URI http://asc.fasb.org/extlink&oid=123427490&loc=SL37586934-109318

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-Name Accounting Standards Codification
-Topic 740
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-Section 50
-Paragraph 15A
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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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-Publisher FASB
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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 10
-Section 50
-Paragraph 15A
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