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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2012
Income Tax Disclosure [Abstract] |
Schedule Of Federal And State And Foreign Income Tax Provision | The federal and state and foreign income tax provision is summarized as follows:
Year Ended December 31, |  | 2012 |  | 2011 |  | 2010
Current |  |  |  |  |  |
Federal |  | $ | 112,247 |  |  | $ | 99,448 |  |  | $ | 116,388 |
State |  | 5,284 |  |  | 7,067 |  |  | 8,698 |
Foreign |  | 4,511 |  |  | 4,603 |  |  | 3,365 |
|  | 122,042 |  |  | 111,118 |  |  | 128,451 |
Deferred, including current deferred |  |  |  |  |  |
Federal |  | (2,708 | ) |  | (2,317 | ) |  | 6,085 |
State |  | (2,199 | ) |  | 2,477 |  |  | 1,509 |
Foreign |  | 3,970 |  |  | 6 |  |  | — |
|  | (937 | ) |  | 166 |  |  | 7,594 |
Income taxes attributable to the Noncontrolling interest |  | 357 |  |  | 553 |  |  | 416 |
Total income taxes |  | $ | 121,462 |  |  | $ | 111,837 |  |  | $ | 136,461 |
Components Of Net Income Before Income Taxes | The components of Net income before income taxes are summarized as follows:
Year Ended December 31, |  | 2012 |  | 2011 |  | 2010
Domestic |  | $ | 319,907 |  |  | $ | 309,391 |  |  | $ | 360,937 |
Foreign |  | 8,046 |  |  | 6,852 |  |  | 6,795 |
|  | $ | 327,953 |  |  | $ | 316,243 |  |  | $ | 367,732 |
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate | The effective income tax rate differs from the federal income tax statutory rate due to the following:
Year Ended December 31, |  | 2012 |  | 2011 |  | 2010
Statutory rate |  | 35.0 | % |  | 35.0 | % |  | 35.0 | %
State taxes, net of Federal tax benefit |  | 1.0 |  |  | 2.0 |  |  | 2.0 |
Foreign tax expense and tax rate differential |  | 1.6 |  |  | 0.6 |  |  | 0.4 |
Research and development tax credit |  | — |  |  | (0.7 | ) |  | (0.5 | )
Domestic Production Activities Deduction |  | (0.6 | ) |  | (0.7 | ) |  | — |
Valuation allowance on PA loss carryforwards | (0.3 | ) |  | — |  |  | — |
Domestic Production Activities Deduction, prior years, net |  | — |  |  | (1.5 | ) |  | — |
Net change in uncertain tax positions (1) |  | 0.5 |  |  | 0.4 |  |  | 0.2 |
Other, net |  | (0.3 | ) |  | 0.1 |  |  | (0.1 | )
|  | 36.9 | % |  | 35.2 | % |  | 37.0 | %
Schedule of Deferred Tax Assets and Liabilities | The net deferred income tax liability is comprised of:
Year Ended December 31, |  | 2012 |  | 2011
Current deferred income taxes: |  |  |  |
Gross assets |  | $ | 2,012 |  |  | $ | 1,151 |
Gross liabilities |  | — |  |  | (1 | )
|  | 2,012 |  |  | 1,150 |
Valuation allowance |  | — |  |  | — |
|  | 2,012 |  |  | 1,150 |
Long-term deferred income taxes: |  |  |  |
Gross assets |  | 63,129 |  |  | 63,374 |
Gross liabilities |  | (149,708 | ) |  | (148,540 | )
|  | (86,579 | ) |  | (85,166 | )
Valuation allowance |  | (6,879 | ) |  | (8,585 | )
|  | (93,458 | ) |  | (93,751 | )
Net deferred income tax liability |  | $ | (91,446 | ) |  | $ | (92,601 | )
Schedule of Tax Effect of Tempoarary Differences Representing Net Deferred Tax Asset or Liability [Table Text Block] | The tax effect of significant temporary differences representing deferred tax liabilities is:
Year Ended December 31, |  | 2012 |  | 2011
Difference in financial reporting and income tax depreciation methods |  | $ | (10,104 | ) |  | $ | (13,600 | )
Reserves not currently deductible |  | 325 |  |  | 374 |
Capitalized software currently deductible for tax purposes, net of amortization |  | (137,467 | ) |  | (139,455 | )
State deferred income taxes |  | 5,943 |  |  | 6,717 |
Revenue and expense recognized in different periods for financial reporting and income tax purposes |  | 4,397 |  |  | 3,149 |
Unrealized holding gain on investments |  | (1,428 | ) |  | (927 | )
Stock-based compensation expense |  | 42,133 |  |  | 43,879 |
State net operating loss carryforward |  | 13,883 |  |  | 14,485 |
Valuation allowance on deferred tax assets |  | (6,879 | ) |  | (8,585 | )
Federal benefit of state tax deduction for uncertain tax positions |  | 2,359 |  |  | 1,725 |
Foreign currency exchange |  | (39 | ) |  | (363 | )
Foreign deferred including taxes on cumulative undistributed earnings of SEI AK | (4,569 | ) |  | — |
Net deferred income tax liability |  | $ | (91,446 | ) |  | $ | (92,601 | )
Schedule of Unrecognized Tax Benefits Roll Forward | A reconciliation of the beginning and ending amount of unrecognized tax benefit is as follows:
|  | 2012 |  | 2011 |  | 2010
Balance as of January 1 |  | $ | 9,410 |  |  | $ | 5,723 |  |  | $ | 4,989 |
Tax positions related to current year: |  |  |  |  |  |
Gross additions |  | 2,196 |  |  | 2,392 |  |  | 1,372 |
Gross reductions |  | — |  |  | — |  |  | — |
|  | 2,196 |  |  | 2,392 |  |  | 1,372 |
Tax positions related to prior years: |  |  |  |  |  |
Gross additions |  | 1,990 |  |  | 1,992 |  |  | — |
Gross reductions |  | — |  |  | — |  |  | (104 | )
|  | 1,990 |  |  | 1,992 |  |  | (104 | )
Settlements |  | (99 | ) |  | — |  |  | (102 | )
Lapses on statute of limitations |  | (1,944 | ) |  | (697 | ) |  | (432 | )
Balance as of December 31 |  | $ | 11,553 |  |  | $ | 9,410 |  |  | $ | 5,723 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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