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Summary Of Significant Accounting Policies (Fair Value Of Long Term Debt) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2012 Term Loan [Member] | Dec. 31, 2012 Revolving Credit Facility [Member] | Dec. 31, 2013 Term Loan Maturing June 2018 [Member] | Dec. 31, 2012 2025 Notes [Member] | Jan. 31, 2009 2025 Notes [Member] | Mar. 31, 2005 2025 Notes [Member] | Dec. 31, 2013 2032 Notes [Member] | Dec. 31, 2012 2032 Notes [Member] | Mar. 31, 2012 2032 Notes [Member] | Dec. 31, 2012 Senior Unsecured Notes [Member] | Dec. 31, 2013 MARAD Debt [Member] | Dec. 31, 2012 MARAD Debt [Member]
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, Carrying Value | $ 592,668 |  | $ 1,050,916 |  | $ 367,181 | [1] | $ 100,000 | [1] | $ 292,500 |  | $ 3,487 | [2] |  | $ 300,000 | $ 200,000 | [3] | $ 200,000 | [3] | $ 200,000 | $ 274,960 | [4] | $ 100,168 |  | $ 105,288 |
Long-term debt, Fair Value | 645,687 | [5] | 1,117,498 | [5] | 368,295 | [1],[5] | 100,000 | [1],[5] | 293,963 | [5] | 3,487 | [2],[5] |  |  | 242,250 | [3],[5] | 239,320 | [3],[5] |  | 283,209 | [4],[5] | 109,474 | [5] | 123,187 | [5]
Unamortized debt discount | $ 26,516 | [6] | $ 31,688 |  |  |  |  |  |  |  |  |  | $ 60,200 |  | $ 26,516 | [6],[7] |  |  | $ 35,400 |  |  |  |  |  |
[1] | Relates to the term loans and revolving credit facility under our former credit agreement, which was terminated in June 2013.
[2] | This remaining amount was repurchased by us in February 2013.
[3] | Carrying value excludes the related unamortized debt discount of $26.5 million at December 31, 2013.
[4] | We redeemed our remaining Senior Unsecured Notes in July 2013.
[5] | The estimated fair value of all debt, other than the MARAD debt, was determined using Level 1 inputs using the market approach. The fair value of the MARAD debt was determined using a third party evaluation of the remaining average life and outstanding principal balance of the MARAD indebtedness as compared to other governmental obligations in the marketplace with similar terms. The fair value of the MARAD Debt was estimated using Level 2 fair value inputs using the market approach.
[6] | The 2032 Notes will increase to their principal amount through accretion of non-cash interest charges through March 2018.
[7] | Beginning in March 2018, the holders of the 2032 Notes may require us to repurchase these notes or we may at our option elect to repurchase notes. These notes will mature in March 2032.

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- Definition Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 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 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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- Definition The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400 + 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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