Leases (Supplemental Cash Flow Information Related To Leases) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating cash flows for finance leases	$ 105	$ 174
Operating cash flows for operating leases	14,060	31,220
Right-of-use assets obtained in exchange for new operating lease liabilities		$ 18,091
Right-of-use assets obtained in exchange for new operating lease liabilities	$ (2,054)