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FAIR VALUE OF FINANCIAL INSTRUMENTS (Debt) (Detail) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2012 | Dec. 31, 2011
--- | --- | ---
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Long-term Debt | $ 588,126 | $ 586,430
Estimate Of Fair Value Fair Value Disclosure [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Long Term Debt Fair Value | 616,178 | 626,110
Estimate Of Fair Value Fair Value Disclosure [Member] | Industrial Revenue Bond [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Long Term Debt Fair Value | 8,826 | 9,004
Estimate Of Fair Value Fair Value Disclosure [Member] | Senior Notes Five Seventy Four [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Long Term Debt Fair Value | 132,179 | 134,982
Estimate Of Fair Value Fair Value Disclosure [Member] | Senior Notes Five Fifty One [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Long Term Debt Fair Value | 170,890 | 172,871
Estimate Of Fair Value Fair Value Disclosure [Member] | Senior Notes Three Eighty Four [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Long Term Debt Fair Value | 100,597 | 101,886
Estimate Of Fair Value Fair Value Disclosure [Member] | Senior Notes Four Twenty Four [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Long Term Debt Fair Value | 201,194 | 204,965
Estimate Of Fair Value Fair Value Disclosure [Member] | Other Debt Obligations [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Long Term Debt Fair Value | 2,492 | 2,402
Carrying Reported Amount Fair Value Disclosure [Member] | Industrial Revenue Bond [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Long-term Debt | 8,826 | 9,004
Carrying Reported Amount Fair Value Disclosure [Member] | Senior Notes Five Seventy Four [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Long-term Debt | 125,017 | 125,024
Carrying Reported Amount Fair Value Disclosure [Member] | Senior Notes Five Fifty One [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Long-term Debt | 150,000 | 150,000
Carrying Reported Amount Fair Value Disclosure [Member] | Senior Notes Three Eighty Four [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Long-term Debt | 100,597 | 100,000
Carrying Reported Amount Fair Value Disclosure [Member] | Senior Notes Four Twenty Four [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Long-term Debt | 201,194 | 200,000
Carrying Reported Amount Fair Value Disclosure [Member] | Other Debt Obligations [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Long-term Debt | $ 2,492 | $ 2,402

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- Definition Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any. + 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 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 7 -Section 03 -Paragraph 16 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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