JOINT VENTURE PARTNERSHIPS AND EQUITY METHOD INVESTMENTS (Details) $ in Millions, $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2018 CAD ($)	Dec. 31, 2017 USD ($)
Joint venture partnerships and equity method investments, condensed unconsolidated financial information
Current assets			$ 67.9		$ 45.7
Other assets			15.7		14.4
Total assets			83.6		60.1
Current liabilities			33.3		31.6
Other liabilities			5.8		1.0
Total liabilities			39.1		32.6
Partners' equity			44.5		27.5
Total liabilities and partners’ equity			83.6		$ 60.1
Joint venture partnerships and equity method investments, condensed unconsolidated financial information, Income Statement
Net revenues	$ 212.5	$ 156.7	186.3
Gross profit	62.6	45.7	62.4
Net earnings	$ 25.7	$ 20.3	34.4
The value of the Company's recorded investment in the Alberta partnership assigned to Canadian licenses			32.3
AHS transfer to Canadian JV				$ 50.0
Alberta, Canada [Member]
Investments in unconsolidated joint venture partnerships and equity method investments Financial Statement, Reported Amounts
Net Investment			$ (40.9)
Interest Owned			43.37%	43.37%
Charlotte, North Carolina [Member]
Investments in unconsolidated joint venture partnerships and equity method investments Financial Statement, Reported Amounts
Net Investment			$ (9.5)
Florence, South Carolina [Member]
Investments in unconsolidated joint venture partnerships and equity method investments Financial Statement, Reported Amounts
Net Investment			$ (10.1)
Interest Owned			49.00%	49.00%