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
Leases [Abstract]
Operating lease cost	$ 529	$ 569	$ 1,039	$ 1,117
Short-term lease cost	789	4,167	3,052	10,386
Variable Lease, Cost	373	0	693	0
Total lease cost	$ 1,691	$ 4,736	$ 4,784	$ 11,503