Leases (Supplemental 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 operating lease liabilities	$ 19,619	$ 20,008
Right-of-use assets obtained in exchange for operating lease obligations, net of early lease terminations	$ 26,807	$ 13,399