Cover Page - shares	9 Months Ended
	Sep. 30, 2021	Nov. 01, 2021
Document Information [Line Items]
Document Type	10-Q
Entity Interactive Data Current	Yes
Amendment Flag	false
Document Period End Date	Sep. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Entity File Number	000-56132
Entity Registrant Name	GREEN THUMB INDUSTRIES INC.
Entity Central Index Key	0001795139
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Address, Address Line One	325 West Huron Street
Entity Address, Address Line Two	Suite 700
Entity Address, City or Town	Chicago
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60654
Entity Tax Identification Number	98-1437430
City Area Code	312
Local Phone Number	471-6720
Entity Incorporation, State or Country Code	A1
Document Quarterly Report	true
Document Transition Report	false
Subordinate Voting Shares [Member]
Document Information [Line Items]
Title of 12(g) Security	Subordinate Voting Shares
Entity Common Stock, Shares Outstanding		194,781,223
Super Voting Shares [Member]
Document Information [Line Items]
Title of 12(g) Security	Super Voting Shares
Entity Common Stock, Shares Outstanding		29,503,100
Multiple Voting Shares [Member]
Document Information [Line Items]
Title of 12(g) Security	Multiple Voting Shares
Entity Common Stock, Shares Outstanding		3,965,400