SUBSEQUENT EVENTS (Details) - Subsequent Event facility in Thousands, shares in Millions, $ in Millions	Apr. 02, 2018 USD ($) facility shares
Interest Rate Swap
Subsequent Event [Line Items]
Interest rate cash flow hedge asset at fair value	$ 600.0
Derivative, fixed interest rate	2.80%
Line of Credit
Subsequent Event [Line Items]
Face amount	$ 980.0
Line of Credit | London Interbank Offered Rate (LIBOR)
Subsequent Event [Line Items]
Basis spread on variable rate	3.50%
Line of Credit | Federal Funds Effective Swap Rate
Subsequent Event [Line Items]
Basis spread on variable rate	0.50%
Line of Credit | Adjusted LIBOR
Subsequent Event [Line Items]
Basis spread on variable rate	1.00%
Discount rate	1.50%
Debt issuance costs, net	$ 33.0
Line of Credit | Applicable Rate if Leverage Ratio is Equal to or Falls Below 4.00 to 1.00 | London Interbank Offered Rate (LIBOR)
Subsequent Event [Line Items]
Basis spread on variable rate	3.25%
Revolving Credit Facility
Subsequent Event [Line Items]
Face amount	$ 100.0
Butler Group Holdings, Inc.
Subsequent Event [Line Items]
Consideration transferred	$ 1,170.0
Number of provider facilities | facility	44
Payments to acquire businesses, gross	$ 1,100.0
Equity interest issued or issuable (in shares) | shares	7.6
Equity interests issued and issuable	$ 70.0