Income Taxes (Tables)

12 Months Ended

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