NET LOSS PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. NET LOSS PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. - ANTIDILUTIVE SECURITIES (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
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)	1,282	1,035	1,243	1,276
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