Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Revenue:
Product	$ 399,662	$ 378,504	$ 455,406
Service and support	735,567	683,602	674,860
Total revenue	1,135,229	1,062,106	1,130,266
Cost of revenue:
Product	131,989	123,279	145,071
Service and support	276,582	261,978	248,061
Amortization of acquired technology	38,216	37,372	35,774
Total cost of revenue	446,787	422,629	428,906
Gross profit	688,442	639,477	701,360
Operating expenses:
Research and development, net	190,643	171,070	177,650
Selling, general and administrative	414,960	406,952	412,728
Amortization of other acquired intangible assets	34,209	44,089	43,130
Total operating expenses	639,812	622,111	633,508
Operating income	48,630	17,366	67,852
Other income (expense), net:
Interest income	2,477	1,048	1,490
Interest expense	(35,959)	(34,962)	(33,885)
Losses on early retirements of debt	(2,150)	0	0
Other income (expense), net	5,902	(6,926)	(12,277)
Total other expense, net	(29,730)	(40,840)	(44,672)
Income (loss) before provision (benefit) for income taxes	18,900	(23,474)	23,180
Provision for income taxes	22,354	2,772	952
Net (loss) income	(3,454)	(26,246)	22,228
Net income attributable to noncontrolling interest	3,173	3,134	4,590
Net (loss) income attributable to Verint Systems Inc.	$ (6,627)	$ (29,380)	$ 17,638
Net (loss) income per common share attributable to Verint Systems Inc.
Basic (in dollars per share)	$ (0.10)	$ (0.47)	$ 0.29
Diluted (in dollars per share)	$ (0.10)	$ (0.47)	$ 0.28
Weighted-average common shares outstanding
Basic (in shares)	63,312	62,593	61,813
Diluted (in shares)	63,312	62,593	62,921