v3.19.3.a.u2
ACQUISTIONS - Intangible assets (Details) - USD ($)
$ in Millions
Mar. 28, 2017
Dec. 31, 2019
Dec. 31, 2018
Amortizable Intangible Assets:      
Gross Carrying Amount   $ 52.5 $ 258.5
Nordic      
Amortizable Intangible Assets:      
Weighted Average Amortization Period 5 years 6 months    
Gross Carrying Amount $ 11.6    
Unamortized Intangible Assets:      
Trade names $ 10.5 $ 10.5 10.7
Favorable leases      
Amortizable Intangible Assets:      
Gross Carrying Amount     $ 206.0
Favorable leases | Nordic      
Amortizable Intangible Assets:      
Weighted Average Amortization Period 7 years    
Gross Carrying Amount $ 3.5    
Favorable sublease | Nordic      
Amortizable Intangible Assets:      
Weighted Average Amortization Period 4 years    
Gross Carrying Amount $ 1.1    
Screen advertising agreement | Nordic      
Amortizable Intangible Assets:      
Weighted Average Amortization Period 5 years    
Gross Carrying Amount $ 6.6    
Trade name agreement | Nordic      
Amortizable Intangible Assets:      
Weighted Average Amortization Period 4 years    
Gross Carrying Amount $ 0.4