1. Basis of Presentation and Use of Estimates Immaterial Errors (Details) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Property, Plant and Equipment, Net	$ 420,897,000		$ 414,401,000
Inventory, Net	516,047,000		516,245,000
Payments for (proceeds from) derivative instruments, operating activities	(3,292,000)	(969,000)
Net Cash Provided by (Used in) Operating Activities	233,096,000	98,586,000
Net Cash Provided by (Used in) Investing Activities	(141,067,000)	40,364,000
Scenario, Adjustment [Member] | Immaterial Error [Member]
Property, Plant and Equipment, Net			(15,000,000)
Income Taxes Receivable			(5,300,000)
Inventory, Net			15,000,000
Payments for (Proceeds from) Derivative Instrument, Investing Activities		(1,000,000)
Payments for (proceeds from) derivative instruments, operating activities		1,000,000
Net Cash Provided by (Used in) Operating Activities		(4,400,000)
Income Taxes Receivable, Noncurrent			5,300,000
Net Cash Provided by (Used in) Investing Activities		$ 4,400,000