Discontinued Operations (Details) $ in Thousands, $ in Millions				2 Months Ended	3 Months Ended			12 Months Ended
	Jun. 28, 2019 USD ($)	Feb. 28, 2019 CAD ($)	Feb. 28, 2019 USD ($)	Feb. 28, 2019 USD ($)	Mar. 31, 2020 USD ($)	Sep. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CAD ($)	Aug. 31, 2019 USD ($)	Feb. 19, 2019 CAD ($)	Feb. 18, 2019 CAD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Consideration											$ 419.0
Disposal Group, Total enterprise value	$ 625,000
Disposal Group, repayment of intercompany loans	224,600
Disposal Group, including discontinued operation, consideration, cash		$ 50.0								$ 28,400		$ 150.0
Disposal Group, including discontinued operation, consideration, shares		42.5								$ 19,600		$ 127.5
Disposal Group, Net indebtedness		71.3
disposal group, including discontinued operation, transaction costs		$ 5.0
Proceeds from sale of businesses					$ 0		$ 124,210
Gain on sale of discontinued operations, net of income tax					0		121,659
Gain on sale of discontinued operations					0		121,659
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal							121,700
Debt and Equity Securities, Realized Gain (Loss), Excluding Other-than-temporary Impairment					$ 0	$ (4,900)	(5,300)
Manitoba Harvest [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, including discontinued operation, consideration, shares									$ 49.0
United States of America, Dollars
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Net indebtedness			$ 53,700
Clean Earth
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
disposal group, including discontinued operation, transaction costs	10,700
Proceeds from sale of businesses	$ 327,300
Disposal Group, Including Discontinued Operation, Intercompany Interest Expense Excluded from Income (Loss) from Discontinued Operations							$ 4,700
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal								$ 209,300
Manitoba Harvest [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of businesses			$ 124,200
Disposal Group, Including Discontinued Operation, Intercompany Interest Expense Excluded from Income (Loss) from Discontinued Operations				$ 1,000