Lease Accounting (Cash Flow Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Cash paid for amounts included in the measurement of lease liabilities	$ 41,308	$ 44,046
Leased assets obtained in exchange for new operating lease liabilities (1)	$ 8,035	$ 198,389