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Segments (Schedule of Revenues and Long-Lived Assets by Geographical Area) (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues, net | $ 202,617 | $ 186,932 | $ 171,820 | $ 146,165 | $ 140,160 | $ 134,213 | $ 134,213 | $ 111,005 | $ 707,534 | $ 519,591 | $ 433,841
Long-lived assets (excluding goodwill) | 599,907 |  |  |  | 464,165 |  |  |  | 599,907 | 464,165 | 263,469
United States [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues, net |  |  |  |  |  |  |  |  | 399,573 | 348,065 | 286,922
Long-lived assets (excluding goodwill) | 152,175 |  |  |  | 112,630 |  |  |  | 152,175 | 112,630 |
United Kingdom [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues, net |  |  |  |  |  |  |  |  | 153,305 | 80,778 | 77,349
Long-lived assets (excluding goodwill) | 225,050 |  |  |  | 230,580 |  |  |  | 225,050 | 230,580 |
Czech Republic [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues, net |  |  |  |  |  |  |  |  |  | 54,542 | 52,871
Long-lived assets (excluding goodwill) |  |  |  |  | 47,081 |  |  |  |  | 47,081 |
Brazil [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Long-lived assets (excluding goodwill) | $ 81,934 |  |  |  |  |  |  |  | $ 81,934 |  |

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- Definition Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 38 -Subparagraph b(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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