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Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Shares	Additional Paid-in Capital	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Loss
Beginning Balance at Jan. 31, 2018	$ 1,300,903	$ 6,564	$ 11	$ 684	$ 1,310,859	$ 6,564	$ (10,651)
Beginning Balances (in shares) at Jan. 31, 2018			108,248,568
Comprehensive income	281,551				298,003		(16,452)
Share-based compensation	18,104			18,104
Share-based awards	13,618			13,618
Share-based awards (in shares)			1,147,896
Share repurchases	(131,642)			(32,406)	(99,236)
Share repurchases (in shares)			(3,754,181)
Ending Balance at Jan. 31, 2019	1,489,098		$ 11		1,516,190		(27,103)
Ending Balances (in shares) at Jan. 31, 2019			105,642,283
Comprehensive income	167,195				168,096		(901)
Share-based compensation	21,109			21,109
Share-based awards	974			974
Share-based awards (in shares)			588,158
Share repurchases	(223,021)		$ (1)	(12,606)	(210,414)
Share repurchases (in shares)			(8,253,626)
Ending Balance at Jan. 31, 2020	$ 1,455,355		$ 10	9,477	1,473,872		(28,004)
Ending Balances (in shares) at Jan. 31, 2020	97,976,815		97,976,815
Comprehensive income	$ 12,120				1,236		10,884
Share-based compensation	20,300			20,300
Share-based awards	495			495
Share-based awards (in shares)			482,508
Share repurchases	(10,912)			(10,912)
Share repurchases (in shares)			(643,338)
Ending Balance at Jan. 31, 2021	$ 1,477,358		$ 10	$ 19,360	$ 1,475,108		$ (17,120)
Ending Balances (in shares) at Jan. 31, 2021	97,815,985		97,815,985

X

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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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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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