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Borrowings - Additional Information (Detail) (USD $) | 12 Months Ended |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  | 12 Months Ended | 1 Months Ended |  | 1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  |  |
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2012 Convertible Notes Three Point Eight Seven Five Percent | Dec. 31, 2012 Securitization Program | Jun. 13, 2011 6.875% Senior Subordinated Notes Due 2019 | Jul. 01, 2012 6.875% Senior Subordinated Notes Due 2019 | Dec. 31, 2012 6.875% Senior Subordinated Notes Due 2019 | Jun. 13, 2012 6.875% Senior Subordinated Notes Due 2019 | Dec. 31, 2011 6.875% Senior Subordinated Notes Due 2019 | Dec. 31, 2011 2004 Senior Notes | Mar. 31, 2011 Incremental Facility | Dec. 31, 2012 Incremental Facility | Mar. 31, 2011 Senior Credit Facility, Term Loan Facility, At An Average Rate Of 1.31%, Due 10/1/2012 | Mar. 31, 2011 Extension Of Senior Credit Facility | Dec. 31, 2012 Extension Of Senior Credit Facility | Mar. 31, 2011 Extension Of Senior Credit Facility Minimum | Mar. 31, 2011 Extension Of Senior Credit Facility Maximum | Dec. 31, 2012 Term Loan | Dec. 31, 2012 Federal Funds Rate | Dec. 31, 2012 Federal Funds Rate Minimum | Dec. 31, 2012 Federal Funds Rate Maximum | Dec. 31, 2012 Prime Rate | Dec. 31, 2012 LIBOR | Dec. 31, 2012 LIBOR Minimum | Dec. 31, 2012 LIBOR Maximum | Dec. 31, 2012 Libor Maximum | Dec. 31, 2011 Revolving Credit Facility | Dec. 31, 2012 Revolving Credit Facility | Dec. 31, 2012 Revolving Credit Facility Standby Letters of Credit | Dec. 31, 2012 3.875% Convertible Senior Subordinated Notes Due 2017 D | Dec. 31, 2011 3.875% Convertible Senior Subordinated Notes Due 2017 | Dec. 31, 2012 Term loan facility, at a rate of 2.75%, due 10/1/2014 | Dec. 31, 2011 Term loan facility, at a rate of 2.75%, due 10/1/2014
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility |  |  |  |  |  |  |  |  |  |  |  |  | $ 375,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,400,000 |  |  | $ 375,000,000 | $ 375,000,000
Repayment of borrowings under senior credit facilities |  |  |  |  |  |  |  |  |  |  |  | 80,000,000 |  |  |  |  |  |  | 125,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional borrowings on convertible notes |  |  |  |  |  |  |  |  |  |  |  | 100,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of term loans maturing in 2012 to term loans with new maturity |  |  |  |  |  |  |  |  |  |  |  |  |  | 36,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving credit facility converted amount with new termination date |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 33,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument maturity date |  |  |  |  |  |  |  | 2019 | 2019 |  |  |  |  |  | 2014-10-01 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2017 | 2017 |  |
Transaction fees |  |  |  |  |  | 3,700,000 |  |  |  |  |  |  |  |  |  | 300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread |  |  |  |  |  |  |  | 0.50% |  |  |  |  |  |  |  |  |  |  |  | 0.50% |  |  | 1.00% | 0.25% | 2.50% |  |  |  |  |  |  |  |  |
Additional margin over libor plus basis spread |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.50% | 1.75% |  |  | 1.50% | 2.75% |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  |  |  | 6.875% | 6.875% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.75% |  |  |  | 3.875% | 3.875% |  |
Borrowing under revolving credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 165,000,000 |  |  |  |  |  |
Maximum amount available for borrowing |  |  |  |  | 44,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 400,000,000 |  |  |  |  |  |
Amount available in committed financing under the revolving credit facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 397,600,000 |  |  |  |  |
Commitment fee percent | 0.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.375% | 0.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount of convertible notes | 400,000,000 | 400,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of trading days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20 days |  |  |
Number of consecutive trading days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 30 days |  |  |
Percentage of conversion price of applicable trading day |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 130.00% |  |  |
Number of business days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 |  |  |
Principal amount of Convertible Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,000 |  |  |
Percentage of the product of the last reported sale price of the common stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 98.00% |  |  |
Convertible Notes conversion rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 16.3084 |  |  |
Conversion price, per share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 61.32 |  |  |
Convertible note hedge transactions, purchased call options | 88,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible note hedge transactions, net of tax | 56,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible notes, latest date of termination | Jul. 28, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of shares of common stock issued under the terms of the warrant transactions |  |  | 19.99% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of convertible notes, shares issued upon conversion |  |  | 7,981,422 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Strike price of warrants |  |  | $ 74.65 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants expiration period |  |  | 180 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants expiration date |  |  | Nov. 01, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of warrants |  |  | 59,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible debt, fair value | 316,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial equity component | 83,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible notes, carrying value, net of tax | 53,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt discount | 83,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining life of the convertible notes | 4 years 7 months 6 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Effective interest rate | 7.814% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
6.875% Senior Subordinated Notes due 2019 |  |  |  |  |  |  |  | 250,000,000 | 250,000,000 | 250,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of Debt |  |  |  |  |  | 125,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Write-off of debt issuance costs |  |  |  |  |  |  | 800,000 |  |  |  | 700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percent of redemption price to principal amount any time on or after June 1, 2015 |  |  |  |  |  |  |  | 103.438% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, earliest date of redemption |  |  |  |  |  |  |  | Jun. 01, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Declining percent of redemption price to principal amount on June1, 2017 |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percent of redemption price to principal amount on redemption at any time prior to June 1, 2015 |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Make-whole premium as percentage of principal amount of Notes subject to redemption |  |  |  |  |  |  |  | 1.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percent of principal amount of notes redeemable |  |  |  |  |  |  |  | 35.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percent of redemption price of the principal amount of the notes redeemed, plus accrued and unpaid interest |  |  |  |  |  |  |  | 106.875% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  | 350,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swap liability position |  | 14,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued interest |  | 3,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prepayment of debt |  |  |  |  |  |  |  |  |  |  | 165,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prepayment to holders, make-whole amount and accrued and unpaid interest |  |  |  |  |  |  |  |  |  |  | 13,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings under revolving credit facility used to fund prepayment of 2004 Notes |  |  |  |  |  |  |  |  |  |  | 150,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying amount of long-term debt | 965,280,000 | 954,809,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum amount available under receivable securitization |  | 50,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding borrowings under accounts receivable securitization facility | $ 4,700,000 | $ 4,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible notes, conversion price based on 130% conversion ratio |  |  |  | $ 79.72 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Exercise price of the warrants. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column A + Details
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- Definition Borrowings under Revolving Credit Facility used to Fund Repayment of Notes. + References No definition available. + Details
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- Definition Class of Warrant Term + References No definition available. + Details
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- Definition Conversion Price of Note based on Conversion Ratio + References No definition available. + Details
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- Definition Debt Instrument, Convertible, Associated Derivative Transactions Net Of Tax, Purchased Call Options + References No definition available. + Details
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- Definition Debt Instrument, Convertible, Associated Derivative Transactions, Purchased Call Options + References No definition available. + Details
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- Definition Debt Instrument, Earliest Date of Redemption + References No definition available. + Details
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- Definition Declining percent of redemption price to principal amount. + References No definition available. + Details
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- Definition Make-Whole Premium as Percentage of Principal Amount of Notes Subject to Redemption + References No definition available. + Details
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- Definition Number of consecutive trading days. + References No definition available. + Details
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- Definition Outstanding Borrowings under Accounts Receivable Securitization Facility. + References No definition available. + Details
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- Definition Percentage of the product of the last reported sale price of the common stock. + References No definition available. + Details
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- Definition Percentage of shares of common stock issued under the terms of the warrant transactions. + References No definition available. + Details
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- Definition Percent of principal amount of notes redeemable. + References No definition available. + Details
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- Definition Percent of redemption price of the principal amount of the Notes redeemed, plus accrued and unpaid interest. + References No definition available. + Details
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- Definition Percent of redemption price to principal amount. + References No definition available. + Details
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- Definition Percent of redemption price to principal amount on early redemption. + References No definition available. + Details
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- Definition Principal amount of Convertible Notes. + References No definition available. + Details
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- Definition Revolving Credit Facility, Converted Amount with New Termination Date + References No definition available. + Details
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- Definition The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations. + References No definition available. + Details
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- Definition The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer. + 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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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 10 -Section F Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Article 5 -Subsection 19, 20, 22 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 5: 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 Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -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 -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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