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LEASES (Additional Information) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Leases [Abstract]        
Weighted-average remaining lease term on operating leases 7 years   7 years  
Weighted-average discount rate on operating leases 3.50%   3.50%  
Operating lease expense $ 8.5 $ 6.5 $ 15.8 $ 14.7
Variable charges related to operating leases not included in measurement of lease liability $ 2.4   5.1  
Cash paid included in measurement of operating lease liabilities     $ 16.9