LONG-TERM DEBT AND FINANCING ARRANGEMENTS (Credit Facility) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Sep. 30, 2019
Financing Arrangements
Borrowings under credit facilities	$ 180,000
Credit Facility
Financing Arrangements
Maximum borrowing capacity		$ 250,000
Additional borrowing capacity that may be requested		125,000
Borrowings under credit facilities	180,000
Remaining borrowing capacity	$ 0
Swing Line Facility
Financing Arrangements
Maximum borrowing capacity		25,000
Letters of Credit, Sub-Facility
Financing Arrangements
Maximum borrowing capacity		$ 20,000