Business Segments (Geographic Information on Revenues from External Customers) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
External Revenues	$ 1,874,129	$ 3,033,080	$ 5,476,084
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
External Revenues	693,200	1,260,000	2,201,500
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
External Revenues	421,100	557,300	1,052,400
Malaysia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
External Revenues	759,300	1,210,900	2,233,000
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
External Revenues	$ 500	$ 4,900	$ (10,800)