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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2013
Accounting Policies [Abstract] |
Calculation Of Basic And Diluted Earnings Per Share | The calculations of basic and diluted earnings per share for 2013, 2012 and 2011 are:
|  | For the Year Ended December 31, 2013
|  | Net income attributable to SEI (Numerator) |  | Shares (Denominator) |  | Per-Share Amount
Basic earnings per common share |  | $ | 288,124 |  |  | 171,561,000 |  |  | $ | 1.68 |
Dilutive effect of stock options |  | — |  |  | 4,157,000 |  |  |
Diluted earnings per common share |  | $ | 288,124 |  |  | 175,718,000 |  |  | $ | 1.64 |
|  | For the Year Ended December 31, 2012
|  | Net income attributable to SEI (Numerator) |  | Shares (Denominator) |  | Per-Share Amount
Basic earnings per common share |  | $ | 206,848 |  |  | 174,295,000 |  |  | $ | 1.19 |
Dilutive effect of stock options |  | — |  |  | 1,577,000 |  |  |
Diluted earnings per common share |  | $ | 206,848 |  |  | 175,872,000 |  |  | $ | 1.18 |
|  | For the Year Ended December 31, 2011
|  | Net income attributable to SEI (Numerator) |  | Shares (Denominator) |  | Per-Share Amount
Basic earnings per common share |  | $ | 204,959 |  |  | 182,547,000 |  |  | $ | 1.12 |
Dilutive effect of stock options |  | — |  |  | 1,580,000 |  |  |
Diluted earnings per common share |  | $ | 204,959 |  |  | 184,127,000 |  |  | $ | 1.11 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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