Segment Information (Schedule of Segment Revenues from Major Customers) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue, Major Customer [Line Items]
Revenue from Contract with Customers	$ 1,375,559	$ 1,472,790	$ 1,321,412
PAMC
Revenue, Major Customer [Line Items]
Revenue from Contract with Customers	1,308,196	1,407,864	1,261,346
Sales revenue, net | Customer concentration risk | Customer A | PAMC
Revenue, Major Customer [Line Items]
Revenue from Contract with Customers	242,703	283,703
Sales revenue, net | Customer concentration risk | Customer B | PAMC
Revenue, Major Customer [Line Items]
Revenue from Contract with Customers	446,403	274,755	145,248
Sales revenue, net | Customer concentration risk | Customer C | PAMC
Revenue, Major Customer [Line Items]
Revenue from Contract with Customers	$ 215,099	$ 214,152	$ 222,354