Consolidated interest coverage ratio

No definition available.

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- Definition

Consolidated net leverage ratio

+ References

No definition available.

+ Details

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- Definition

Line Of Credit Facility Amount Utilized

+ References

No definition available.

+ Details

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- Definition

Term of line of credit.

+ 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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- Definition

Reflects when the credit facility first became available, which may be presented in a variety of ways (year, month and year, day, month and year, quarter).

+ 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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

Reference 3: 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

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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

+ Details

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- Definition

Amount of the required periodic payment applied to principal.

+ References

+ 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 SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

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

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- Definition

The cash outflow for loan and debt issuance costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 18, 19, 20

-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

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3291-108585

+ Details

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- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ 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 210.5-02.17)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Debt (Senior Credit Facility) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended		6 Months Ended		6 Months Ended	0 Months Ended	6 Months Ended
	Jun. 30, 2012 Senior Credit Facility [Member] Y	Jul. 08, 2011 Senior Credit Facility [Member]	Jun. 30, 2012 Incremental Senior Credit Facility [Member]	Jan. 20, 2012 Incremental Senior Credit Facility [Member]	Jun. 30, 2012 Five-Year Senior, Secured, Revolving Credit Facility [Member]	Jan. 20, 2012 Amendment To The Senior Credit Facility [Member]	Jun. 30, 2012 Amendment To The Senior Credit Facility [Member]	Jun. 30, 2012 Eight Scheduled Quarterly [Member] Incremental Senior Credit Facility [Member]	Jun. 30, 2012 Four Scheduled Quarterly [Member] Incremental Senior Credit Facility [Member]	Jun. 30, 2012 Minimum [Member] Senior Credit Facility [Member]	Jun. 30, 2012 Maximum [Member] Senior Credit Facility [Member]	Jun. 30, 2012 Alternative A [Member] Minimum [Member] Libor [Member] Senior Credit Facility [Member]	Jun. 30, 2012 Alternative A [Member] Maximum [Member] Libor [Member] Senior Credit Facility [Member]	Jun. 30, 2012 Alternative B [Member] Federal Funds [Member] Senior Credit Facility [Member]	Jun. 30, 2012 Alternative B [Member] Monthly Libor [Member] Senior Credit Facility [Member]	Jun. 30, 2012 Alternative B [Member] Minimum [Member] Libor [Member] Senior Credit Facility [Member]	Jun. 30, 2012 Alternative B [Member] Maximum [Member] Libor [Member] Senior Credit Facility [Member]	Jun. 30, 2012 Standby Letters of Credit Guaranteeing Company Industrial Revenue Bonds [Member] Senior Credit Facility [Member]	Jun. 30, 2012 Standby Letters of Credit Related to Various Insurance Contracts and Foreign Vendor Commitments [Member] Senior Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, initiation date					July 8, 2011		January 20, 2012
Term of line of credit (years)	5
Maximum borrowing capacity under credit facility		$ 900,000		$ 150,000
Payment of financing costs	8,218					1,018
Unamortized financing costs		12,277
Quarterly principal payments			5,625					1,875	3,750
Basis spread on debt instrument												1.25%	2.00%	0.50%	1.00%	0.25%	1.00%
Commitment fee percentage										0.25%	0.40%
Consolidated interest coverage ratio										3
Consolidated net leverage ratio											3.75
Amount utilized from long-term lines of credit	773,461
Available amount under credit facility	274,664
Utilized borrowings under credit facility	676,125
Standby letters of credit for various insurance contracts and commitments to foreign vendors																		$ 46,796	$ 50,540