TAXES ON INCOME (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings (loss) before taxes on income [Abstract]
Earnings (loss) before taxes on income	$ 57,066	$ 47,861	$ 144,451	$ 131,874
Federal [Abstract]
Current	0	3,617	0	13,605
Deferred	13,457	14,132	36,350	32,783
State and local [Abstract]
Current	1,559	1,323	3,965	3,080
Deferred	0	0	488	0
Foreign - current	100	0	239	0
Total Provision for taxes on income	15,116	19,072	41,042	49,468
United States [Member]
Earnings (loss) before taxes on income [Abstract]
Earnings (loss) before taxes on income	57,980	47,861	147,506	131,874
Foreign [Member]
Earnings (loss) before taxes on income [Abstract]
Earnings (loss) before taxes on income	$ (914)	$ 0	$ (3,055)	$ 0

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