CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Common Stock Held in Treasury	Total
Balance at beginning of period at Jan. 31, 2019	$ 264	$ 464,112	$ (15,194)	$ 758,881	$ (19,054)	$ 1,189,009
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity awards exercised/vested, net		(5,818)			5,858	40
Share-based compensation expense		4,227				4,227
Taxes paid for net share settlements		(5,686)				(5,686)
Other comprehensive loss, net			(3,227)			(3,227)
Net income (loss)				12,043		12,043
Balance at end of period at Apr. 30, 2019	264	456,835	(18,421)	761,344	(13,196)	1,186,826
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of adoption of accounting standard				(9,580)		(9,580)
Balance at beginning of period at Jan. 31, 2020	264	452,142	(18,008)	893,138	(36,864)	1,290,672
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity awards exercised/vested, net		(1,185)			1,185
Share-based compensation expense		(811)				(811)
Taxes paid for net share settlements		(306)				(306)
Other comprehensive loss, net			(4,026)			(4,026)
Net income (loss)				(39,295)		(39,295)
Balance at end of period at Apr. 30, 2020	$ 264	$ 449,840	$ (22,034)	$ 853,843	$ (35,679)	$ 1,246,234

Amount of decrease to equity for grantee's tax withholding obligation for award under share-based payment arrangement.

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Amount of increase to additional paid-in capital (APIC) for recognition of cost for award under share-based payment arrangement.

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Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Value, before forfeiture, of shares issued under share-based payment arrangement. Excludes employee stock ownership plan (ESOP).

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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