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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, 2019	$ 1,489,098	$ 11		$ 1,516,190	$ (27,103)
Beginning Balances (in shares) at Jan. 31, 2019		105,642,283
Comprehensive income (loss)	145,969			148,557	(2,588)
Share-based compensation	16,807		$ 16,807
Share-based awards	974		974
Share-based awards (in shares)		585,658
Share repurchases	(222,995)	$ (1)	(12,580)	(210,414)
Share repurchases (in shares)		(8,252,598)
Ending Balance at Oct. 31, 2019	$ 1,429,853	$ 10	5,201	1,454,333	(29,691)
Ending Balances (in shares) at Oct. 31, 2019	97,975,343	97,975,343
Beginning Balance at Jul. 31, 2019	$ 1,361,404	$ 10		1,398,681	(37,287)
Beginning Balances (in shares) at Jul. 31, 2019		97,965,012
Comprehensive income (loss)	63,248			55,652	7,596
Share-based compensation	5,346		5,346
Share-based awards (in shares)		16,669
Share repurchases	(145)		(145)
Share repurchases (in shares)		(6,338)
Ending Balance at Oct. 31, 2019	$ 1,429,853	$ 10	5,201	1,454,333	(29,691)
Ending Balances (in shares) at Oct. 31, 2019	97,975,343	97,975,343
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	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

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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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