v2.4.0.8

Long-Term Debt - Additional Information (Detail) (USD $) | 12 Months Ended |  | 1 Months Ended |  |  | 3 Months Ended | 1 Months Ended | 12 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, 2011 Prior Credit Facility [Member] | Dec. 31, 2010 Prior Credit Facility [Member] | Jul. 21, 2006 Prior Credit Facility [Member] | Jul. 21, 2006 Prior Credit Facility [Member] Term Loan [Member] | Sep. 30, 2007 Prior Credit Facility [Member] Senior secured revolving credit facility [Member] | Sep. 12, 2007 Prior Credit Facility [Member] Senior secured revolving credit facility [Member] | Jul. 21, 2006 Prior Credit Facility [Member] Senior secured revolving credit facility [Member] | Mar. 31, 2011 Prior Credit Facility [Member] Interest Rate Option One [Member] Term Loan [Member] | Mar. 31, 2011 Prior Credit Facility [Member] Interest Rate Option One [Member] Senior secured revolving credit facility [Member] | Mar. 31, 2011 Prior Credit Facility [Member] Interest Rate Option Two [Member] Term Loan [Member] | Mar. 31, 2011 Prior Credit Facility [Member] Interest Rate Option Two [Member] Senior secured revolving credit facility [Member] | Jul. 31, 2012 New Credit Facility [Member] | Mar. 31, 2011 New Credit Facility [Member] | Dec. 31, 2012 New Credit Facility [Member] | Dec. 31, 2011 New Credit Facility [Member] | Mar. 09, 2011 New Credit Facility [Member] | Dec. 31, 2012 New Credit Facility [Member] Term Loan [Member] | Jul. 26, 2012 New Credit Facility [Member] Term Loan [Member] | Dec. 31, 2012 New Credit Facility [Member] Senior secured revolving credit facility [Member] | Dec. 31, 2012 New Credit Facility [Member] Secured Debt [Member] | Dec. 31, 2011 New Credit Facility [Member] Secured Debt [Member] | Dec. 31, 2012 New Credit Facility [Member] Interest Rate Option One [Member] | Dec. 31, 2012 New Credit Facility [Member] Interest Rate Option One [Member] Term Loan [Member] | Dec. 31, 2012 New Credit Facility [Member] Interest Rate Option Two [Member] | Dec. 31, 2012 New Credit Facility [Member] Interest Rate Option Two [Member] Term Loan [Member] | Dec. 31, 2012 Maximum [Member] New Credit Facility [Member] | Dec. 31, 2012 Maximum [Member] New Credit Facility [Member] Interest Rate Option One [Member] | Dec. 31, 2012 Maximum [Member] New Credit Facility [Member] Interest Rate Option One [Member] Term Loan [Member] | Dec. 31, 2012 Maximum [Member] New Credit Facility [Member] Interest Rate Option Two [Member] | Dec. 31, 2012 Maximum [Member] New Credit Facility [Member] Interest Rate Option Two [Member] Term Loan [Member] | Dec. 31, 2012 Minimum [Member] New Credit Facility [Member] | Dec. 31, 2012 Minimum [Member] New Credit Facility [Member] Interest Rate Option One [Member] | Dec. 31, 2012 Minimum [Member] New Credit Facility [Member] Interest Rate Option One [Member] Term Loan [Member] | Dec. 31, 2012 Minimum [Member] New Credit Facility [Member] Interest Rate Option Two [Member] | Dec. 31, 2012 Minimum [Member] New Credit Facility [Member] Interest Rate Option Two [Member] Term Loan [Member]
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior secured revolving credit facility |  |  |  |  |  | $ 300,000,000 | $ 200,000,000 |  | $ 250,000,000 | $ 100,000,000 |  |  |  |  |  |  |  |  | $ 700,000,000 |  | $ 500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase in maximum aggregate borrowing capacity |  |  |  |  |  |  |  | 150,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate spread on variable rate |  |  |  |  |  |  |  |  |  |  | 1.50% |  | 0.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.50% | 2.50% | 1.50% |  |  | 1.50% | 1.50% | 0.50% |
Variable rate basis |  |  |  |  |  |  |  |  |  |  | LIBOR | LIBOR | Base rate | Base rate |  |  |  |  |  |  |  |  |  |  | LIBOR | LIBOR | The base rate under the Credit Facility represents the highest of the Federal Funds Rate plus 0.50%, one-month LIBOR plus 1.00%, and the prime rate offered by Bank of America. | Base rate |  |  |  |  |  |  |  |  |  |
Interest rate spread on variable rate |  |  |  |  |  |  |  |  |  |  |  | 1.25% |  | 0.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.50% |  |  |  |  | 0.50%
Credit facility maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
New Credit Facility, maturity date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Mar. 09, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Base rate in excess of Federal Funds Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.50% |  |  |  |  |  |  |  |  |  |  |
Base rate in excess of one-month LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.00% |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, unused capacity, commitment fee percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.50% |  |  |  |  | 0.25% |  |  |  |
Repayment of all amounts outstanding under the prior credit facility by using borrowings under the new credit facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 196,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issuance costs in connection with term loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,700,000 |  |  | 4,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of all amounts outstanding under the prior credit facility by using borrowings under the new credit facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, weighted average interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.96% | 1.89% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility, amount borrowed |  |  |  | 54,000,000 | 427,000,000 |  |  |  |  |  |  |  |  |  |  |  | 1,428,000,000 | 859,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility, amount repaid |  |  |  | 228,900,000 | 487,000,000 |  |  |  |  |  |  |  |  |  |  |  | 1,142,500,000 | 657,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility, amount outstanding | 487,500,000 | 202,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 487,500,000 | 202,000,000 |  | 487,500,000 |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency borrowings outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate annual maturities, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 56,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate annual maturities, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 81,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate annual maturities, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate annual maturities, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 250,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense | 16,700,000 | 9,900,000 | 9,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Write-off of unamortized deferred financing costs resulting from the extinguishment of credit facility |  | $ 914,000 |  | $ 914,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Gross amount, as of the balance sheet date, of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings in periods after one year or beyond the normal operating cycle, if longer, over the life of the long-term debt instruments to which such costs pertain. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 21 -Paragraph 16 -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 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28555-108399 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 47 -Paragraph 10 -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 The cash inflow 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 either short term or long term maturity that is collateralized (backed by pledge, mortgage or other lien in the entity's assets). + References Reference 1: 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 2: 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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3255-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 19 -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 The cash inflow 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 Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3255-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 19 -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 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 Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: 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 3: 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. Reference 4: 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. + 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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