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Debt - Additional Information (Detail) (USD $) | 12 Months Ended |  |  | 1 Months Ended |  | 1 Months Ended |
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Dec. 31, 2011 | Nov. 10, 2011 | Dec. 31, 2011 Minimum | Dec. 31, 2011 Maximum | Dec. 31, 2011 Parent Company and Domestic Subsidiaries | Dec. 31, 2011 Foreign Subsidiaries | Dec. 31, 2011 Prior to closing date of acquisition of S1 and until the earlier to occur of the one-year anniversary of such closing date | Dec. 31, 2011 If closing date of acquisition of S1 occurs prior to the one-year anniversary of closing date | Dec. 31, 2011 On and after one-year anniversary of closing date | Nov. 10, 2011 Revolving Credit Facility | Nov. 10, 2011 Term Credit Facility | Sep. 29, 2011 Senior Secured Revolving Credit Facility | Nov. 10, 2011 Senior Secured Revolving Credit Facility Minimum | Sep. 29, 2011 Senior Secured Revolving Credit Facility Minimum | Nov. 10, 2011 Senior Secured Revolving Credit Facility Maximum | Sep. 29, 2011 Senior Secured Revolving Credit Facility Maximum
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facilities, maximum borrowing capacity |  |  |  |  |  |  |  |  |  | $ 250,000,000 | $ 200,000,000 | $ 100,000,000 |  |  |  |
Credit facilities, maturity |  |  |  |  |  |  |  |  |  | 5 years | 5 years | 5 years |  |  |  |
Senior secured revolving credit facility, maturity date |  |  |  |  |  |  |  |  |  |  |  | Sep. 29, 2016 |  |  |  |
Note payable under credit facility | 75,000,000 | 75,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issuance costs |  | 12,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment of debt issuance costs | $ 11,789,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility, interest rate description | Borrowings under the Credit Facility bear interest at a rate per annum equal to, at the Company’s option, either (a) a base rate determined by reference to the highest of (1) the rate of interest per annum publicly announced by the Administrative Agent as its Prime Rate, (2) the federal funds effective rate plus 1/2 of 1% and (3) a LIBOR based rate determined by reference to the costs of funds for U.S. dollar deposits for a one-month interest period adjusted for certain additional costs plus 1% or (b) a LIBOR based rate determined by reference to the costs of funds for U.S. dollar deposits for the interest period relevant to such borrowing adjusted for certain additional costs, in each case plus an applicable margin. The applicable margin for borrowings under the Revolving Credit Facility is, based on the calculation of the applicable consolidated total leverage ratio, between 0.50% to 1.50% with respect to base rate borrowings and between 1.50% and 2.50% with respect to LIBOR based borrowings. The initial borrowing rate on November 10, 2011 was set using the 30-day LIBOR rate, effecting a rate of 2.25%. Interest is due and payable monthly. |  |  |  |  |  |  |  |  |  |  | The Company could select either a base rate loan or a LIBOR based loan. Base rate loans are computed at the highest of (a) the national prime interest rate as announced by Wells Fargo, (b) the sum of the Federal fund rate plus 0.5%, or (c) the LIBOR rate for an interest period of one month plus 1.0%, in each case, plus a margin ranging from 0.50% to 1.25%. LIBOR based loans are computed at the applicable LIBOR rate plus a margin ranging from 1.50% to 2.25%. The margins are dependent upon the Company’s total leverage ratio at the end of each quarter. The initial borrowing rate on September 29, 2011 was set using the LIBOR rate option, effecting a rate of 1.74%. Interest was due and payable quarterly |  |  |  |
Credit facility, interest rate margin above federal fund rate | 0.50% |  |  |  |  |  |  |  |  |  |  | 0.50% |  |  |  |
Credit facility, interest rate margin above one-month LIBOR rate | 1.00% |  |  |  |  |  |  |  |  |  |  | 1.00% |  |  |  |
Credit facility, interest rate margin above base rate |  |  | 0.50% | 1.50% |  |  |  |  |  |  |  |  |  | 0.50% |  | 1.25%
Credit facility, interest rate margin above base rate |  |  | 1.50% | 2.50% |  |  |  |  |  |  |  |  |  | 1.50% |  | 2.25%
Credit facility, borrowing rate |  | 2.25% |  |  |  |  |  |  |  |  |  | 1.74% |  |  |  |
Percentage of capital stock pledged as collateral |  |  |  |  | 100.00% | 65.00% |  |  |  |  |  |  |  |  |  |
Maximum consolidated total leverage ratio |  |  |  |  |  |  | 3.50 | 3.25 | 3.00 |  |  |  |  |  |  |
Senior secured revolving credit facility, unused quarterly commitment fee |  |  |  |  |  |  |  |  |  |  |  |  | 0.25% |  | 0.40% |

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- Definition Maximum consolidated total leverage ratio as of the last day of each fiscal quarter required to be maintained by Company any time loans or letters of credit are outstanding. + References No definition available. + Details
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- Definition Percentage of capital stock pledged as collateral under the Company's Credit Agreement. + References No definition available. + Details
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- Definition Description of the interest rate as being fixed or variable, and, if variable, identification of the index or rate on which the interest rate is based and the number of points or percentage added to that index or rate to set the rate, and other pertinent information, such as frequency of rate resets. + 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 SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 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 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Date when the debt instrument is scheduled to be fully repaid, which may be presented in a variety of ways (year, month and year, day, month and year, quarter, etc.). + 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 SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 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 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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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 SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The carrying value as of the balance sheet date of the noncurrent portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Line-of-Credit Arrangement -URI http://asc.fasb.org/extlink&oid=6517033 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6743817&loc=d3e1314-112600 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=6743817&loc=d3e1336-112600 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 6 -Paragraph 9, 10, 11 -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 6: 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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