v3.10.0.1
LONG-TERM DEBT - Build-to-Suit Leases (Details) - Construction project - USD ($)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2018
Dec. 31, 2018
Long-term debt    
Amount of contribution   $ 4.5
Construction costs $ 2.4 $ 0.0