Leases Components of Lease Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating Lease, Cost	$ 13,946	$ 15,131
Short-term Lease, Cost	17,125	36,348
Lease, Cost	$ 31,071	$ 51,479