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Credit Agreement and Debt - Schedule of Long Term Debt in the Accompanying Condensed Consolidated Balance Sheets (Parenthetical) (Detail)
9 Months Ended
Oct. 31, 2020
Jan. 31, 2020
Term Loan Due June 15, 2022 [Member]    
Debt Instrument [Line Items]    
Debt instrument, description of variable rate basis 3.80% as of October 31, 2020); maturity date of June 15, 2022)  
Interest rate 3.80%  
Debt instrument, maturity date Jun. 15, 2022  
Term Loan Due January 31, 2020 [Member]    
Debt Instrument [Line Items]    
Interest rate   3.03%
Term Loan Due January 31, 2020 One [Member]    
Debt Instrument [Line Items]    
Interest rate   3.03%