Leases Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Lease, Cost [Abstract]
Operating Lease, Cost	$ 1,930	$ 1,384	$ 3,812	$ 2,731
Finance Lease, Right-of-Use Asset, Amortization	500	497	989	987
Finance Lease, Interest Payment on Liability	51	67	106	129
Finance Lease, Cost	551	564	1,095	1,116
Short-term Lease, Cost	35,912	51,074	131,985	112,105
Lease, Cost	$ 38,393	$ 53,022	$ 136,892	$ 115,952