Taxes on Income, Schedule of Effective Income Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Company's provision for taxes on income varied from the statutory federal income tax rate [Abstract]
United States income tax statutory rate	21.00%	21.00%	21.00%	35.00%
State and local taxes, net of federal benefit	1.20%	0.70%	6.50%
CARES Act - net operating loss carryback	21.30%	0.00%	0.00%
Other - net	(2.40%)	3.00%	3.20%
Effective income tax rate	41.10%	24.70%	30.70%