Revenue from Contracts with Customers (Schedule of Information about Contract Assets and Contract Liabilities from Contracts with Customers) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Contract With Customer Asset And Liability [Abstract]
Deferred revenue, Beginning Balance	$ 2,052
Deferred revenue, Additions	77,000
Deferred revenue, Deductions	(22,638)
Deferred revenue, Ending Balance	$ 56,414