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Long-Term Debt | 6 Months Ended
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Jun. 30, 2013
Debt Disclosure [Abstract] |
Long-Term Debt | Long-Term Debt Senior Bank Debt The Company entered into a $1.25 billion senior unsecured revolving credit facility in April 2013 (the "credit facility") which matures in April 2018. As of June 30, 2013, the current outstanding balance under the credit facility is $100.0 million. The credit facility is unsecured and contains financial covenants with respect to leverage and interest coverage, as well as customary affirmative and negative covenants, including limitations on indebtedness, liens, cash dividends, asset dispositions and fundamental corporate changes. Convertible Securities In the second quarter of 2013, the Company repurchased an aggregate of $53.4 million principal amount outstanding of its 3.95% senior convertible notes due 2038 ("2008 senior convertible notes"). In July 2013, the Company repurchased an additional $26.1 million principal amount outstanding and subsequently called the outstanding 2008 senior convertible notes for redemption on August 15, 2013. In lieu of redemption, holders of the 2008 senior convertible notes may convert their securities at any time before the close of business on August 14, 2013. The conversion rate is 7.9586 shares of Company common stock per $1,000 principal amount of 2008 senior convertible notes. The Company may elect to settle such conversions in cash or common stock (or a combination thereof). Pursuant to its call and prior repurchases, all of the Company's 2008 senior convertible notes will be canceled and retired.

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- Definition The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 3: 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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20,22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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