Long-Term Debt (Senior Credit Facility) (Details) (USD $)			12 Months Ended		12 Months Ended								0 Months Ended							12 Months Ended
	Dec. 31, 2012 Senior Secured Credit Facility [Member]	Jul. 08, 2011 Senior Secured Credit Facility [Member]	Dec. 31, 2012 Senior Secured Credit Facility [Member] Maximum [Member]	Sep. 29, 2012 Senior Secured Credit Facility [Member] Maximum [Member]	Dec. 31, 2012 Senior Secured Credit Facility [Member] Minimum [Member]	Sep. 29, 2012 Senior Secured Credit Facility [Member] Minimum [Member]	Dec. 31, 2012 Senior Secured Credit Facility [Member] Alternative A [Member] Maximum [Member] Libor [Member]	Dec. 31, 2012 Senior Secured Credit Facility [Member] Alternative A [Member] Minimum [Member] Libor [Member]	Dec. 31, 2012 Senior Secured Credit Facility [Member] Alternative B [Member] Federal Funds [Member]	Dec. 31, 2012 Senior Secured Credit Facility [Member] Alternative B [Member] Monthly Libor [Member]	Dec. 31, 2012 Senior Secured Credit Facility [Member] Alternative B [Member] Maximum [Member] Libor [Member]	Dec. 31, 2012 Senior Secured Credit Facility [Member] Alternative B [Member] Minimum [Member] Libor [Member]	Dec. 19, 2012 Secured Credit Facility [Member]	Dec. 31, 2012 Secured Credit Facility [Member]	Dec. 19, 2012 Secured Credit Facility [Member] Libor [Member]	Dec. 31, 2012 Borrowings [Member] Senior Secured Credit Facility [Member]	Dec. 31, 2012 Standby Letters of Credit Guaranteeing Company Industrial Revenue Bonds [Member] Senior Secured Credit Facility [Member]	Dec. 31, 2012 Standby Letters of Credit Related to Various Insurance Contracts and Foreign Vendor Commitments [Member] Senior Secured Credit Facility [Member]	Dec. 31, 2011 Standby Letters of Credit Related to Various Insurance Contracts and Foreign Vendor Commitments [Member] Senior Secured Credit Facility [Member]	Dec. 31, 2012 Standby Letters of Credit Related to Various Insurance Contracts and Foreign Vendor Commitments [Member] Senior Secured Credit Facility [Member] Maximum [Member]
Line of Credit Facility [Line Items]
Basis spread on debt instrument							2.00%	1.25%	0.50%	1.00%	1.00%	0.25%			0.75%
Commitment fee percentage			0.40%		0.25%
Consolidated interest coverage ratio						3
Consolidated net leverage ratio				3.75
Available amount under credit facility	$ 793,137,000
Utilized borrowings under credit facility	251,238,000													280,000,000		153,875,000
Standby letters of credit for various insurance contracts and commitments to foreign vendors																	46,823,000	50,540,000	50,540,000
Term of on-balance sheet accounts receivable securitization agreement													3 years							2 years
Maximum borrowing capacity under credit facility		$ 900,000,000											$ 300,000,000
Unused capacity commitment fee percentage													0.30%