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Fair Value Measurement - Additional Information (Detail) (USD $) | 3 Months Ended | 6 Months Ended |  |  |  |  |  | 3 Months Ended
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Jun. 30, 2013 | Jul. 01, 2012 | Jun. 30, 2013 | Jul. 01, 2012 | Dec. 31, 2012 | Jul. 16, 2013 Subsequent Event Senior Credit Facility | Sep. 30, 2013 Subsequent Event Senior Credit Facility Term Loan | Jul. 16, 2013 Subsequent Event Senior Credit Facility Term Loan | Jun. 30, 2013 Minimum | Jun. 30, 2013 Maximum | Apr. 01, 2012 Significant Unobservable Inputs (Level 3)
Fair Value Measurements [Line Items] |  |  |  |  |  |  |  |  |  |  |
Reversal of contingent consideration | $ 6,600,000 |  | $ 8,100,000 |  |  |  |  |  |  |  |
Carrying amount of long-term debt | 970,825,000 |  | 970,825,000 |  | 965,280,000 |  |  |  |  |  |
Credit facility |  |  |  |  |  | 775,000,000 | 375,000,000 | 375,000,000 |  |  |
Goodwill impairment |  | 332,000,000 |  | 332,128,000 |  |  |  |  |  |  | 332,000,000
Fair value of contingent consideration liability associated with future milestone |  |  |  |  |  |  |  |  | 5,000,000 | 84,900,000 |
Contingent consideration | 32,500,000 |  | 32,500,000 |  |  |  |  |  |  |  |
Current contingent consideration | 12,400,000 |  | 12,400,000 |  |  |  |  |  |  |  |
Other liabilities | $ 20,100,000 |  | $ 20,100,000 |  |  |  |  |  |  |  |

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- Definition Estimated Fair Value Of Contingent Consideration In Event Company Achieves Specified Milestones + References No definition available. + Details
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- Definition Fair Value Measurement with Unobservable Inputs Reconciliation Contingent Liability in Acquisition + References No definition available. + Details
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- Definition Fair Value, Measurement with Unobservable Inputs Reconciliation, Contingent Liability in Acquisition, Current + References No definition available. + Details
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- Definition Fair Value, Measurement with Unobservable Inputs Reconciliation, Contingent Liability in Acquisition, Noncurrent + References No definition available. + Details
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- Definition Amount of (increase) decrease in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e7008-128479 + Details
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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13854-109267 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + 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) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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