Other Property, Plant and Equipment, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Other property, plant and equipment
Other property, plant and equipment, gross	$ 14,207		$ 14,207		$ 14,102
Less: accumulated depreciation	(3,851)		(3,851)		(3,083)
Property, Plant and Equipment, Other, Net, Total	10,356		10,356		11,019
Depreciation on Other PPE	4,096	$ 4,098	8,092	$ 8,214
Land
Other property, plant and equipment
Other property, plant and equipment, gross	9,163		9,163		9,163
Buildings and leasehold improvements
Other property, plant and equipment
Other property, plant and equipment, gross	115		115		115
Machinery and office equipment
Other property, plant and equipment
Other property, plant and equipment, gross	1,175		1,175		1,072
Software and other
Other property, plant and equipment
Other property, plant and equipment, gross	3,754		3,754		$ 3,752
Property, Plant and Equipment Other Types
Other property, plant and equipment
Depreciation on Other PPE	$ 400	$ 400	$ 800	$ 800