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Accumulated Comprehensive Income (Loss) (Schedule Of Accumulated Other Comprehensive Income (Loss), Net Of Tax) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Accumulated other comprehensive income (loss), Foreign Currency Translation Adjustments | $ 3,410 | $ (674) | $ 1,818 | $ 298
Accumulated other comprehensive income (loss), Unrealized Holding Gains (Losses) on Investments | 2,829 | 2,574 | 1,339 | 960
Accumulated Other Comprehensive Income (Loss) | 6,239 | 1,900 | 3,157 | 1,258
Total comprehensive loss, Foreign Currency Translation Adjustments | 5,904 | (3,195) | 2,205 |
Total comprehensive loss, Unrealized Holding Gains (Losses) on Investments | 255 | 1,235 | 379 |
Other Comprehensive Income (Loss), Net of Tax | 6,159 | (1,960) | 2,584 |
Total comprehensive loss attributable to noncontrolling interest, Foreign Currency Translation Adjustments | (1,820) | 703 | (685) |
Total comprehensive income attributable to noncontrolling interest, Unrealized Holding Gains (Losses) on Investments | 0 | 0 | 0 |
Total comprehensive loss attributable to noncontrolling interest | (1,820) | 703 | (685) |
Total comprehensive income attributable to SEI Investments Company, Foreign Currency Translation Adjustments | 4,084 | (2,492) | 1,520 |
Total comprehensive (loss) attributable to SEI Investments Company, Unrealized Holding Gains (Losses) on Investments | 255 | 1,235 | 379 |
Total comprehensive income attributable to SEI Investments Company | 4,339 | (1,257) | 1,899 |
SEI Investments Company [Member] |  |  |  |
Accumulated other comprehensive income (loss), Foreign Currency Translation Adjustments | 3,861 | (2,043) | 1,152 | (1,053)
Accumulated other comprehensive income (loss), Unrealized Holding Gains (Losses) on Investments | 2,829 | 2,574 | 1,339 | 960
Accumulated Other Comprehensive Income (Loss) | 6,690 | 531 | 2,491 | (93)
Noncontrolling Interest [Member] |  |  |  |
Accumulated other comprehensive income (loss), Foreign Currency Translation Adjustments | (451) | 1,369 | 666 | 1,351
Accumulated other comprehensive income (loss), Unrealized Holding Gains (Losses) on Investments | 0 | 0 | 0 | 0
Accumulated Other Comprehensive Income (Loss) | $ (451) | $ 1,369 | $ 666 | $ 1,351

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- Definition Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 52 -Paragraph 12, 13 -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 Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 17, 18, 19, 22, 23, 24, 25, 26 -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 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e637-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 -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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=20435746&loc=SL7669646-108580 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 52 -Paragraph 31 -Subparagraph a -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 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e681-108580 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -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 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6915805&loc=d3e32022-110900 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=20435746&loc=SL7669686-108580 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 + Details
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