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Long-Term Debt And Capital Lease Obligations - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 6 Months Ended | 1 Months Ended
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Jun. 30, 2012 | Jul. 16, 2012 Subsequent Event Repayment of Debt
Long-Term Debt And Capital Lease Obligations [Line Items] |  |
Senior notes maturity date | 2012-07-15 |
Repayment of convertible note |  | $ 151.3
Accrued interest on convertible notes |  | 2.8
Borrowings from credit facility to repay convertible notes |  | $ 75.0

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- Definition Line Of Credit Facility Withdrawal For Repayments Of Debt + References No definition available. + Details
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- Definition The cash outflow for a borrowing supported by a written promise to pay an obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3291-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. + Details
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