Conversion Of Stock, Shares Available For Conversion.

No definition available.

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- Definition

Percentage of voting equity interests acquired.

+ References

No definition available.

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- Definition

Stock issued during period contingent consideration.

+ References

No definition available.

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- Definition

Stock issued during period deferred share acquisition.

+ References

No definition available.

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- Definition

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities.

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- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

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- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

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Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.

+ References

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- Definition

Description of voting rights of common stock. Includes eligibility to vote and votes per share owned. Include also, if any, unusual voting rights.

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The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer.

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- Definition

Decrease in noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders.

+ References

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Net Increase or Decrease in balance of noncontrolling interest in the subsidiary during the reporting period.

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The aggregate fair value as of the reporting date of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.

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Maximum number of shares that may be issued in accordance with the plan as a proportion of outstanding capital stock.

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No definition available.

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Number of shares of stock issued during the period pursuant to acquisitions.

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Value of stock issued pursuant to acquisitions during the period.

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Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Name:	us-gaap_StatementClassOfStockAxis=gtbif_SuperVotingSharesMember
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Share Capital - Additional of Information (Detail) - USD ($)												1 Months Ended	12 Months Ended
	Dec. 18, 2020	Aug. 31, 2020	Aug. 26, 2020	Aug. 12, 2020	Jun. 29, 2020	May 15, 2020	May 07, 2020	Jun. 07, 2019	Apr. 23, 2019	Feb. 12, 2019	Jan. 01, 2019	Jun. 30, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Feb. 10, 2020	Dec. 29, 2019	Apr. 22, 2019	Apr. 19, 2019
Voting Rights												consolidated its existing common shares on the basis of one Subordinate Voting Share for each 368 existing common shares of the Company.
Issuance of shares under business combinations and investments, Value															$ 2,800,000
Accrued liabilities													$ 400,413
Issuance of shares under contingent consideration													2,713,463
Redeemable Noncontrolling Interest, Equity, Fair Value		$ 11,200,000
Noncontrolling partners interest periodic increase decrease		(8,878,940)					$ (2,000,000)
Reduction of Non controlling interest													$ 2,788,500		17,088,284
Current liability													119,288,435	$ 111,367,255
Stock Issued During Period, Value, New Issues													751,987
Noncontrolling Interest [Member]
Reduction of Non controlling interest													2,788,500		$ 14,821,657
Percentage of voting equity interests acquired																		33.00%
Stock Issued During Period, Value, New Issues													$ 0
George Management Ltd [member]
Cash								$ 5,150,000
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable								1,650,000
Maximum [Member]
Noncontrolling partners interest periodic increase decrease		$ 20,078,940
Maximum [Member] \| George Management Ltd [member]
Percentage of voting equity interests acquired																			60.00%
Ohio Investors 2017 LLC [Member]
Reduction of Non controlling interest														$ 4,198,173
Derivative liability								$ 4,526,401
Ohio Investors 2017 LLC [Member] \| George Management Ltd [member]
Percentage of voting rights acquired								59.00%
Current liability																	$ 5,500,000
Ohio Investors 2017 LLC [Member] \| Minimum [Member]
Percentage of voting rights acquired								40.00%									59.00%
Ohio Investors 2017 LLC [Member] \| Maximum [Member]
Percentage of voting rights acquired								59.00%									60.00%
KW Ventures LLC [Member]
Percentage of voting rights acquired															100.00%
Advanced Grow Labs LLC [Member]
Issuance of shares under contingent consideration													1,396,533
Percentage of voting rights acquired										100.00%
Southern CT Wellness and Healing [member]
Issuance of shares under business combinations and investments	197,826
Issuance of shares under business combinations and investments, Value	$ 751,987
Percentage of voting rights acquired	100.00%
Stock issued during period deferred share acquisition	32,205
GTI Core LLC [Member] \| Minimum [Member]
Percentage of voting rights acquired																			59.00%
GTI New Jersey, LLC [Member]
Percentage of voting rights acquired									33.00%
Reduction of Non controlling interest									$ 570,078
Multiple Voting Shares [Member]
Conversion of Stock, Shares Issued													(333,061)	(334,880)
Common Stock, Shares, Outstanding													40,289	373,350	677,230
Multiple Voting Shares [Member] \| Conversion Of Multiple Voting Shares [member]
Conversion Of Stock, Shares Converted													333,061
Voting Rights													100
Subordinate Voting Shares [Member]
Conversion of Stock, Shares Issued													42,331,900	35,710,400
Common Stock, Shares, Outstanding													178,113,221	128,999,964	43,920,131
Issuance of shares under business combinations and investments								1,233,014			542,416		1,752,065	45,571,444
Issuance of shares under business combinations and investments, Value	$ 5,400,000							$ 13,854,550			$ 4,355,078
Issuance of shares under contingent consideration													2,713,463
Stock Repurchased During Period, Shares											48,450
Stock Issued During Period, Value, New Issues									$ 1,000,000
Shares, Issued, Value																$ 400,413
Subordinate Voting Shares [Member] \| Rise Canton [Member]
Issuance of shares under business combinations and investments						101,695
Issuance of shares under business combinations and investments, Value						$ 1,307,798
Subordinate Voting Shares [Member] \| MC Brands LLC [Member]
Issuance of shares under business combinations and investments					190,000
Issuance of shares under business combinations and investments, Value					$ 1,840,009
Subordinate Voting Shares [Member] \| Ohio Investors 2017 LLC [Member]
Issuance of shares under business combinations and investments		1,315,789
Issuance of shares under business combinations and investments, Value		$ 20,078,940
Subordinate Voting Shares [Member] \| Advanced Grow Labs LLC [Member]
Issuance of shares under business combinations and investments				472,500						7,300,000
Issuance of shares under business combinations and investments, Value				$ 538,000						$ 85,100,000
Subordinate Voting Shares [Member] \| Success Holdings [Member]
Issuance of shares under business combinations and investments			646,353
Issuance of shares under business combinations and investments, Value			$ 8,064,668
Subordinate Voting Shares [Member] \| Southern CT Wellness and Healing [member]
Issuance of shares under business combinations and investments	230,031
Issuance of shares under business combinations and investments, Value	$ 4,619,237
Subordinate Voting Shares [Member] \| GTI New Jersey, LLC [Member]
Issuance of shares under business combinations and investments									671,317
Issuance of shares under business combinations and investments, Value									$ 5,766,613
Subordinate Voting Shares [Member] \| GTII Stock and Incentive Plan [Member]
Percentage of maximum number of shares issued under the plan												10.00%
Subordinate Voting Shares [Member] \| Conversion Of Multiple Voting Shares [member]
Conversion of Stock, Shares Issued													33,306,100
Shares Available For Conversion													4,028,900
Subordinate Voting Shares [Member] \| Conversion Of Super Voting Shares [member]
Conversion of Stock, Shares Issued													9,025,800
Super Voting Shares [Member]
Conversion of Stock, Shares Issued													(90,258)	(22,224)
Common Stock, Shares, Outstanding													312,031	402,289	424,513
Super Voting Shares [Member] \| Conversion Of Super Voting Shares [member]
Conversion Of Stock, Shares Converted													90,258
Voting Rights													1,000
Shares Available For Conversion													31,203,100