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Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Shares	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
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
Comprehensive income	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	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
Beginning Balance at Jan. 31, 2022	$ 1,745,740	$ 10		1,770,560	(24,830)
Beginning Balances (in shares) at Jan. 31, 2022	96,431,044	96,431,044
Comprehensive income	$ 89,000			128,237	(39,237)
Share-based compensation	21,971		21,971
Share-based awards	376		376
Share-based awards (in shares)		725,882
Share repurchases	118,696	$ 1	14,497	104,198
Share repurchases (in shares)		4,982,439
Ending Balance at Oct. 31, 2022	$ 1,738,391	$ 9	7,850	1,794,599	(64,067)
Ending Balances (in shares) at Oct. 31, 2022	92,174,487	92,174,487
Beginning Balance at Jul. 31, 2022	$ 1,707,192	$ 9		1,757,368	(50,185)
Beginning Balances (in shares) at Jul. 31, 2022		92,173,342
Comprehensive income	23,349			37,231	(13,882)
Share-based compensation	7,862		7,862
Share-based awards (in shares)		1,667
Share repurchases	(12)		(12)
Share repurchases (in shares)		(522)
Ending Balance at Oct. 31, 2022	$ 1,738,391	$ 9	$ 7,850	$ 1,794,599	$ (64,067)
Ending Balances (in shares) at Oct. 31, 2022	92,174,487	92,174,487

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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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