DEBT (Detail Textuals) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016	Mar. 09, 2017	Jun. 23, 2015
Debt Instruments [Abstract]
Senior Credit Facility				$ 1,975.0	$ 1,850.0
Amended Delayed-Draw Term Loan Facility, Maximum Borrowing Capacity				1,375.0
Line of Credit Facility, Maximum Borrowing Capacity				600.0	$ 500.0
Proceeds from Lines of Credit	$ 120.0
Letters of Credit Outstanding, Amount	18.6	$ 18.6
Line of Credit Facility, Remaining Borrowing Capacity	$ 461.4	461.4
Subfacility Of Senior Credit Facitility				$ 100.0
Annual Required Principal Payment (Percent) in Years 1 and 2				5.00%
Annual Required Principal Payment (Percent) in Year 3				7.50%
Annual Required Principal Payment (Percent) in Years 4 and 5				10.00%
Repayments of Debt		34.4	$ 50.6
2027 Senior Notes				$ 500.0
Debt Instrument, Interest Rate, Stated Percentage				5.125%
Write-off of unamortized deferred debt issuance costs		2.7
Debt issuance costs		$ 11.2	$ 0.8