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Long-Term Debt (Senior Credit Facility) (Details) (USD $) |  |  | 12 Months Ended |  | 12 Months Ended |  |  | 0 Months Ended |  |  |  |  | 12 Months Ended
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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% |  |  |  |  |  |  |

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- Definition Consolidated net leverage ratio + References No definition available. + Details
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- Definition The percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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- Definition Amount borrowed under the credit facility as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. + References No definition available. + Details
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- Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility. + References No definition available. + Details
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