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Financial Instruments - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Assets Sold under Agreements to Repurchase [Line Items] |  |  |
Gain/Loss on remeasurement of contingent consideration | $ 13.6 | $ 5.2 | $ 10.0
Accretion expense | $ 2.7 | $ 2.2 | $ 3.5
6 3/4 % Senior Notes Due 2020 |  |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |  |
Interest percentage | 6.75% |  |
Debt maturity period | 2020 |  |
6.0% Senior Notes Due 2022 |  |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |  |
Interest percentage | 6.00% |  |
Debt maturity period | 2022 |  |

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- Definition Gain or Loss on remeasurement Of Contingent Consideration + References No definition available. + Details
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- Definition Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present values. Excludes accretion associated with asset retirement obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392676&loc=d3e7480-110848 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 35 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6394232&loc=d3e17558-110866 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 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 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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