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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	184,841			180,809	4,032
Share-based compensation	11,968		11,968
Share-based awards	2,815		2,815
Share-based awards (in shares)		763,636
Share repurchases	(7,562)		(7,562)
Share repurchases (in shares)		(222,531)
Ending Balance at Jul. 31, 2021	$ 1,669,420	$ 10	26,581	1,655,917	(13,088)
Ending Balances (in shares) at Jul. 31, 2021	98,357,090	98,357,090
Beginning Balance at Apr. 30, 2021	$ 1,534,509	$ 10	17,585	1,528,655	(11,741)
Beginning Balances (in shares) at Apr. 30, 2021		98,235,127
Comprehensive income	125,915			127,262	(1,347)
Share-based compensation	7,398		7,398
Share-based awards	1,742		1,742
Share-based awards (in shares)		125,800
Share repurchases	(144)		(144)
Share repurchases (in shares)		(3,837)
Ending Balance at Jul. 31, 2021	$ 1,669,420	$ 10	26,581	1,655,917	(13,088)
Ending Balances (in shares) at Jul. 31, 2021	98,357,090	98,357,090
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	$ 65,651			91,006	(25,355)
Share-based compensation	14,109		14,109
Share-based awards	376		376
Share-based awards (in shares)		724,215
Share repurchases	(118,684)	$ (1)	(14,485)	(104,198)
Share repurchases (in shares)		(4,981,917)
Ending Balance at Jul. 31, 2022	$ 1,707,192	$ 9		1,757,368	(50,185)
Ending Balances (in shares) at Jul. 31, 2022	92,173,342	92,173,342
Beginning Balance at Apr. 30, 2022	$ 1,695,921	$ 9		1,740,508	(44,596)
Beginning Balances (in shares) at Apr. 30, 2022		94,434,621
Comprehensive income	53,884			59,473	(5,589)
Share-based compensation	7,007		7,007
Share-based awards	376		376
Share-based awards (in shares)		54,532
Share repurchases	(49,996)		$ (7,383)	(42,613)
Share repurchases (in shares)		(2,315,811)
Ending Balance at Jul. 31, 2022	$ 1,707,192	$ 9		$ 1,757,368	$ (50,185)
Ending Balances (in shares) at Jul. 31, 2022	92,173,342	92,173,342

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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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