OTHER INCOME (EXPENSE) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
OTHER INCOME (EXPENSE)
Equity earnings in affiliates	$ 114	$ 81	$ 291	$ 243
Other components of net periodic pension (cost) income	(1,059)	(2,102)	(5,089)	(903)
Other income (expense)	2,647	1,818	5,084	766
Total Other income (expense)	$ 1,702	$ (203)	$ 286	$ 106