Inventories (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Inventory [Line Items]
Lower of Cost or Market Inventory Reserve	$ (530,900)		$ (530,900)		$ (240,400)
Inventory Valuation Reserves	530,923		530,923		$ 240,363
Lower of cost or market inventory valuation adjustment	(269,904)	$ 47,801	290,560	$ (184,545)
Inventories [Member]
Inventory [Line Items]
Restructuring Reserve	$ 6,200		$ 6,200