Customer Advances In Excess Of Costs Incurred On Contracts In Progress (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Costs in Excess of Billings on Uncompleted Contracts or Programs [Abstract]
Contract liabilities	$ 786,411	$ 956,884
Less - Advances presented under long-term liabilities	62,830	175,890
Contract liabilities (customer advances)	$ 723,581	$ 780,994

Liability attributable to (i) billings in excess of costs under the percentage of completion contract accounting method representing the difference between contractually invoiced amounts (billings) and revenue recognized based, for example, on costs incurred to estimated total costs at period end or (ii) contractually invoiced amounts (billings) in excess of costs incurred and accumulated under the completed contract accounting method that are expected to be realized within one year or one operating cycle, whichever is longer, from the reporting date.

No definition available.

Name:	us-gaap_BillingsInExcessOfCostCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant