NET LOSS PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. - Additional Information (Details) - USD ($)
5 Months Ended
Apr. 06, 2021
May 07, 2020
Dec. 04, 2019
Jan. 21, 2022
Apr. 09, 2021
Feb. 01, 2021
Jun. 18, 2014
Convertible Preferred Stock              
Class of Stock [Line Items]              
Sale of stock, consideration received on transaction     $ 400,000,000        
Series A Preferred Stock | Series A Private Placement              
Class of Stock [Line Items]              
Sale of stock, consideration received on transaction   $ 200,000,000          
Series B Preferred Stock | Series B Private Placement              
Class of Stock [Line Items]              
Sale of stock, consideration received on transaction $ 200,000,000            
2021 Notes              
Class of Stock [Line Items]              
Conversion price (in dollars per share)         $ 62.08    
Capped calls, initial cap price (in dollars per share) $ 100.00            
2014 Notes              
Class of Stock [Line Items]              
Conversion price (in dollars per share)           $ 40.55  
Exercise price of warrants (in dollars per share)           $ 47.18 $ 75.00
Number of shares of common stock upon conversion           9,541,000  
Warrants, number of underlying common shares (in shares)           9,865,000 6,205,000
Warrants issued (in shares)       293,143      
Warrants exercised on a cashless basis (in shares)       5,031,000