TAXES ON INCOME (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings (loss) before taxes on income [Abstract]
Earnings (loss) before taxes on income	$ 44,854	$ 43,015	$ 87,385	$ 84,013
Federal [Abstract]
Current	0	6,054	0	9,988
Deferred	14,384	10,089	22,893	18,651
State and local [Abstract]
Current	1,599	900	2,406	1,757
Deferred	151	0	488	0
Foreign - current	(73)	0	139	0
Total Provision for taxes on income	16,061	17,043	25,926	30,396
United States [Member]
Earnings (loss) before taxes on income [Abstract]
Earnings (loss) before taxes on income	45,982	43,015	89,526	84,013
Foreign [Member]
Earnings (loss) before taxes on income [Abstract]
Earnings (loss) before taxes on income	$ (1,128)	$ 0	$ (2,141)	$ 0

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