Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2019	Oct. 25, 2019
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Trading Symbol	INST
Entity Registrant Name	INSTRUCTURE INC
Entity Central Index Key	0001355754
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Interactive Data Current	Yes
Entity Common Stock, Shares Outstanding		37,577,533
Entity Shell Company	false
Entity File Number	001-37629
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-3505687
Entity Address, Address Line One	6330 South 3000 East, Suite 700
Entity Address, City or Town	Salt Lake City
Entity Address, State or Province	UT
Entity Address, Postal Zip Code	84121
City Area Code	800
Local Phone Number	203-6755
Document Quarterly Report	true
Document Transition Report	false
Title of 12(b) Security	Common Stock
Security Exchange Name	NYSE