NET INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. NET INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. - ANTIDILUTIVE SECURITIES (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018
Stock options and restricted stock-based awards
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive Securities Excluded from Computation of Earnings Per Share, (in shares)	1,817	401	1,221	325
1.50% convertible senior notes
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive Securities Excluded from Computation of Earnings Per Share, (in shares)	6,205	6,205	6,205	6,205
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive Securities Excluded from Computation of Earnings Per Share, (in shares)	6,205	6,205	6,205	6,205