v3.19.3

Cover - shares	9 Months Ended
Cover - shares	Sep. 30, 2019	Oct. 31, 2019
Cover page.
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Sep. 30, 2019
Entity File Number	001-35264
Entity Registrant Name	CARBONITE, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	33-1111329
Entity Address, Address Line One	Two Avenue de Lafayette
Entity Address, City or Town	Boston
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02111
City Area Code	617
Local Phone Number	587-1100
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	CARB
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		35,005,570
Amendment Flag	false
Entity Central Index Key	0001340127
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3

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Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

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Carbonite Inc 10-Q