INCOME TAXES (Schedule of reconciliation between the theoretical tax expense and the actual tax expense (benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income before taxes, as reported in the consolidated statements of income	$ 178,603	$ 137,123	$ 100,244
Statutory tax rate	21.00%	21.00%	34.00%
Theoretical tax expenses on the above amount at the US statutory tax rate	$ 37,507	$ 28,796	$ 34,083
Income tax at rate other than the U.S. statutory tax rate	(8,784)	(17,432)	(34,734)
Losses and timing differences for which valuation allowance was provided	2,317
Tax Cuts and Jobs Act of 2017	(1,246)	(1,367)	18,735
Non-deductible expenses	4,040	(644)	(1,545)
Other individually immaterial income tax items, net	(188)	(276)	(467)
Actual tax expense (tax benefit)	$ 33,646	$ 9,077	$ 16,072
Effective tax rate	18.80%	6.60%	16.00%