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Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning Balance at Jan. 31, 2020	$ 1,455,355	$ 10	$ 9,477	$ 1,473,872	$ (28,004)
Beginning Balances (in shares) at Jan. 31, 2020		97,976,815
Comprehensive income (loss)	(30,228)			(27,338)	(2,890)
Share-based compensation	17,030		17,030
Share-based awards (in shares)		450,508
Share repurchases	(10,838)		(10,838)
Share repurchases (in shares)		(640,942)
Ending Balance at Oct. 31, 2020	$ 1,431,319	$ 10	15,669	1,446,534	(30,894)
Ending Balances (in shares) at Oct. 31, 2020	97,786,381	97,786,381
Beginning Balance at Jul. 31, 2020	$ 1,350,593	$ 10	9,956	1,369,830	(29,203)
Beginning Balances (in shares) at Jul. 31, 2020		97,779,586
Comprehensive income (loss)	75,013			76,704	(1,691)
Share-based compensation	5,773		5,773
Share-based awards (in shares)		10,000
Share repurchases	(60)		(60)
Share repurchases (in shares)		(3,205)
Ending Balance at Oct. 31, 2020	$ 1,431,319	$ 10	15,669	1,446,534	(30,894)
Ending Balances (in shares) at Oct. 31, 2020	97,786,381	97,786,381
Beginning Balance at Jan. 31, 2021	$ 1,477,358	$ 10	19,360	1,475,108	(17,120)
Beginning Balances (in shares) at Jan. 31, 2021	97,815,985	97,815,985
Comprehensive income (loss)	$ 270,062			269,664	398
Share-based compensation	19,068		19,068
Share-based awards	2,815		2,815
Share-based awards (in shares)		773,634
Share repurchases	(22,572)		(22,572)
Share repurchases (in shares)		(725,757)
Ending Balance at Oct. 31, 2021	$ 1,746,731	$ 10	18,671	1,744,772	(16,722)
Ending Balances (in shares) at Oct. 31, 2021	97,863,862	97,863,862
Beginning Balance at Jul. 31, 2021	$ 1,669,420	$ 10	26,581	1,655,917	(13,088)
Beginning Balances (in shares) at Jul. 31, 2021		98,357,090
Comprehensive income (loss)	85,221			88,855	(3,634)
Share-based compensation	7,100		7,100
Share-based awards (in shares)		9,998
Share repurchases	(15,010)		(15,010)
Share repurchases (in shares)		(503,226)
Ending Balance at Oct. 31, 2021	$ 1,746,731	$ 10	$ 18,671	$ 1,744,772	$ (16,722)
Ending Balances (in shares) at Oct. 31, 2021	97,863,862	97,863,862

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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