SHORT AND LONG-TERM DEBT - SHORT-TERM DEBT NARRATIVE (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Line of Credit Facility [Line Items]
Short-term debt	$ 74,041,000	$ 32,282,000
Maximum amount of short term borrowing outstanding	$ 944,944,000	$ 1,275,430,000
Short-term debt, weighted average interest rate	1.20%	2.40%
Commercial Paper
Line of Credit Facility [Line Items]
Short-term debt	$ 0	$ 0
Revolving Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Debt instrument, covenant, pre-tax income from operations to consolidated interest expense, minimum	200.00%
Revolving Credit Facility | Foreign Line of Credit
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 266,935,000	390,299,000
Short-term foreign bank loans against the lines of credit	74,041,000	$ 32,282,000
Line of Credit | Revolving Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	1,500,000,000
Line Of Credit Facility, Accordion Feature Increase Limit	$ 500,000,000