CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings	Common Stock Held in Treasury	Cumulative Effect, Period of Adoption, Adjustment	Total
Balance at beginning of period at Jan. 31, 2020	$ 264	$ 452,142	$ (18,008)		$ 893,138	$ (36,864)		$ 1,290,672
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity awards exercised/vested, net		(9,178)				9,358		180
Share-based compensation expense		1,737						1,737
Taxes paid for net share settlements		(317)						(317)
Other comprehensive income (loss), net			(252)					(252)
Net income (loss)					(54,271)			(54,271)
Balance at end of period at Jul. 31, 2020	264	444,384	(18,260)		838,867	(27,506)		1,237,749
Balance at beginning of period at Apr. 30, 2020	264	449,840	(22,034)		853,843	(35,679)		1,246,234
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity awards exercised/vested, net		(7,993)				8,173		180
Share-based compensation expense		2,548						2,548
Taxes paid for net share settlements		(11)						(11)
Other comprehensive income (loss), net			3,774					3,774
Net income (loss)					(14,976)			(14,976)
Balance at end of period at Jul. 31, 2020	264	444,384	(18,260)		838,867	(27,506)		1,237,749
Balance at beginning of period at Jan. 31, 2021	264	448,417	(2,094)	$ (271)	916,683	(27,029)	$ (271)	1,336,241
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity awards exercised/vested, net		(5,026)				5,026
Share-based compensation expense		8,419						8,419
Taxes paid for net share settlements		(4,334)						(4,334)
Other comprehensive income (loss), net			(4,932)					(4,932)
Net income (loss)					45,489			45,489
Balance at end of period at Jul. 31, 2021	264	447,476	(7,026)		961,901	(22,003)		1,380,612
Balance at beginning of period at Apr. 30, 2021	264	450,961	(9,057)		942,733	(27,025)		1,357,876
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity awards exercised/vested, net		(5,022)				5,022
Share-based compensation expense		5,871						5,871
Taxes paid for net share settlements		(4,334)						(4,334)
Other comprehensive income (loss), net			2,031					2,031
Net income (loss)					19,168			19,168
Balance at end of period at Jul. 31, 2021	$ 264	$ 447,476	$ (7,026)		$ 961,901	$ (22,003)		$ 1,380,612