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Accumulated Other Comprehensive Income | 12 Months Ended
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Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Accumulated Other Comprehensive Income (Loss) | Accumulated Other Comprehensive Income Other comprehensive income consists of net income and other gains and losses affecting shareholders’ equity that are excluded from net income. For the Company, other comprehensive income includes unrealized gains and losses on available for sale securities and foreign currency translation adjustments. The Company presents other comprehensive income in its Consolidated Statements of Comprehensive Income. Components of Accumulated other comprehensive income consisted of:
|  | Foreign Currency Translation Adjustments |  | Unrealized Holding Gains (Losses) on Investments |  | Accumulated Other Comprehensive Income
Total accumulated other comprehensive income at January 1, 2011 |  | $ | 1,152 |  |  | $ | 1,339 |  |  | $ | 2,491 |
Less: Total accumulated other comprehensive loss attributable to noncontrolling interest at January 1, 2011 |  | 666 |  |  | — |  |  | 666 |
Total accumulated other comprehensive income attributable to SEI Investments Company at January 1, 2011 |  | $ | 1,818 |  |  | $ | 1,339 |  |  | $ | 3,157 |
Other comprehensive loss before reclassifications |  | (3,195 | ) |  | 1,369 |  |  | (1,826 | )
Amounts reclassified from accumulated other comprehensive income |  | — |  |  | (134 | ) |  | (134 | )
Total other comprehensive loss |  | (3,195 | ) |  | 1,235 |  |  | (1,960 | )
Less: Total other comprehensive loss attributable to noncontrolling interest |  | 703 |  |  | — |  |  | 703 |
Total other comprehensive loss attributable to SEI Investments Company |  | $ | (2,492 | ) |  | $ | 1,235 |  |  | $ | (1,257 | )
Total accumulated other comprehensive income at December 31, 2011 |  | (2,043 | ) |  | 2,574 |  |  | 531 |
Less: Total accumulated other comprehensive loss attributable to noncontrolling interest at December 31, 2011 |  | 1,369 |  |  | — |  |  | 1,369 |
Total accumulated other comprehensive income attributable to SEI Investments Company at December 31, 2011 |  | $ | (674 | ) |  | $ | 2,574 |  |  | $ | 1,900 |
Other comprehensive income before reclassifications |  | 5,904 |  |  | 341 |  |  | 6,245 |
Amounts reclassified from accumulated other comprehensive income |  | — |  |  | (86 | ) |  | (86 | )
Total other comprehensive income |  | 5,904 |  |  | 255 |  |  | 6,159 |
Less: Total other comprehensive income attributable to noncontrolling interest |  | (1,820 | ) |  | — |  |  | (1,820 | )
Total other comprehensive income attributable to SEI Investments Company |  | $ | 4,084 |  |  | $ | 255 |  |  | $ | 4,339 |
Total accumulated other comprehensive income at December 31, 2012 |  | 3,861 |  |  | 2,829 |  |  | 6,690 |
Less: Total accumulated other comprehensive income attributable to noncontrolling interest at December 31, 2012 |  | (451 | ) |  | — |  |  | (451 | )
Total accumulated other comprehensive income attributable to SEI Investments Company at December 31, 2012 |  | $ | 3,410 |  |  | $ | 2,829 |  |  | $ | 6,239 |
Other comprehensive loss before reclassifications |  | (3,760 | ) |  | (1,149 | ) |  | (4,909 | )
Amounts reclassified from accumulated other comprehensive income |  | — |  |  | (294 | ) |  | (294 | )
Total other comprehensive loss |  | (3,760 | ) |  | (1,443 | ) |  | (5,203 | )
Less: Total other comprehensive loss attributable to noncontrolling interest |  | 451 |  |  | — |  |  | 451 |
Total other comprehensive loss attributable to SEI Investments Company |  | $ | (3,309 | ) |  | $ | (1,443 | ) |  | $ | (4,752 | )
Total accumulated other comprehensive income at December 31, 2013 |  | 101 |  |  | 1,386 |  |  | 1,487 |
Less: Total accumulated other comprehensive income attributable to noncontrolling interest at December 31, 2013 |  | — |  |  | — |  |  | — |
Total accumulated other comprehensive income attributable to SEI Investments Company at December 31, 2013 |  | $ | 101 |  |  | $ | 1,386 |  |  | $ | 1,487 |

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: 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=28358780&loc=d3e637-108580 Reference 2: 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=28358780&loc=d3e681-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e689-108580 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669619-108580 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e640-108580 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e716-108580 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e709-108580 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Reclassification Adjustments -URI http://asc.fasb.org/extlink&oid=6522872 + Details
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