Annual report pursuant to Section 13 and 15(d)

Cover Page

Cover Page - USD ($)
$ in Billions
12 Months Ended
Dec. 31, 2019
Feb. 14, 2020
Jun. 30, 2019
Cover page.      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2019    
Document Transition Report false    
Entity File Number 000-26621    
Entity Registrant Name NIC INC    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 52-2077581    
Entity Address, Address Line One 25501 West Valley Parkway, Suite 300    
Entity Address, City or Town Olathe    
Entity Address, State or Province KS    
Entity Address, Postal Zip Code 66061    
City Area Code 877    
Local Phone Number 234-3468    
Title of 12(b) Security Common Stock, $0.0001 par value per share    
Trading Symbol EGOV    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 1.1
Entity Common Stock, Shares Outstanding   66,977,642  
Documents Incorporated by Reference Portions of the registrant’s definitive Proxy Statement to be issued in connection with its Annual Meeting of Stockholders to be held in 2020 are incorporated by reference into Part III of this Form 10-K.    
Entity Central Index Key 0001065332    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Amendment Flag false