FINANCING ARRANGEMENTS - ADDITIONAL INFORMATION (Details) - USD ($) |
12 Months Ended | ||
---|---|---|---|
Aug. 26, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
Debt Instrument [Line Items] | |||
Notes payable and current portion of long-term debt | $ 30,100,000 | $ 21,100,000 | |
Total unused lines of credit | 531,200,000 | ||
Commercial Paper | |||
Debt Instrument [Line Items] | |||
Notes payable and current portion of long-term debt | 7,300,000 | $ 0 | |
Commercial Paper | |||
Debt Instrument [Line Items] | |||
Average amount of short-term debt outstanding during the year | 900,000 | ||
Line of Credit | Commercial Paper | |||
Debt Instrument [Line Items] | |||
Credit facilities, maximum borrowing capacity | 500,000,000 | ||
Term Loan Agreement | |||
Debt Instrument [Line Items] | |||
Annual principal payment | $ 8,800,000 | 8,800,000 | |
Mandatory principal amortization due in each of the first six years (as a percent) | 5.00% | ||
Debt instrument face amount | $ 175,000,000 |