Leases (Supplemental Cash Flow Information Related To Leases) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Operating cash flows for finance leases	$ 86	$ 128
Operating cash flows for operating leases	10,190	22,988
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 179	$ 5,760