Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Statement of Financial Position [Abstract]
Allowance for doubtful accounts, receivables	$ 763	$ 721
Accumulated depreciation	$ 248,988	$ 233,779
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	250,000,000	250,000,000
Common stock, shares issued (in shares)	78,136,144	78,136,144
Common stock, shares outstanding (in shares)	64,399,241	65,098,379
Treasury stock (in shares)	13,736,903	13,037,765