INCOME TAXES (SOURCES OF PRE-TAX INCOME TABLE) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Sources of pre-tax accounting income
Domestic	$ 129,620	$ 39,864	$ (13,926)
Foreign	40,648	70,547	70,164
Income before income taxes	$ 170,268	$ 110,411	$ 56,238