Fair Value Measurements - Schedule of Fair Value, Assets Measured on Recurring Basis (Detail) - USD ($) $ in Thousands	Oct. 31, 2019	Jul. 31, 2019	Jan. 31, 2019
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	$ 90,229	$ 130,100
Deferred compensation plan assets and liabilities	55,954	53,828
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency forward contract liability	729	$ 0
Interest rate swap liability	$ 16,641		$ 12,463