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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2011

Income Taxes [Abstract]

Schedule Of Income Tax Provision

		2009				2010				2011
Current:
Federal		$	57,690			$	70,967			$	53,344
State			13,256				14,815				12,081
Total current			70,946				85,782				65,425
Deferred:
Federal			(1,697	)			(71	)			4,760
State			(565	)			28				(707	)
Total deferred			(2,262	)			(43	)			4,053
Total provision for income taxes		$	68,684			$	85,739			$	69,478

Schedule Of Tax Effects Of Principal Temporary Differences That Give Rise To Deferred Tax Assets

		2010				2011
Tuition receivable		$	3,130			$	4,629
Employee-related liabilities			601				420
Deferred gain on sale of property			111				111
Unrealized gains on marketable securities			186				–
Current net deferred tax asset			4,028				5,160
Property and equipment			(5,631	)			(15,335	)
Deferred leasing costs			3,013				4,130
Stock-based compensation			10,369				13,656
Deferred gain on sale of property			606				495
Interest rate swap			–				399
Other			17				(19	)
Long-term net deferred tax asset			8,374				3,326
Net deferred tax asset		$	12,402			$	8,486

Schedule Of Reconciliation Between Statutory Tax Rate And Effective Tax Rate

		2009				2010				2011
Statutory federal rate			35.0	%			35.0	%			35.0	%
State income taxes, net of federal benefits			4.8				4.4				4.3
Non-taxable interest income			(0.3	)			(0.1	)			–
Other			–				0.2				0.3
Effective tax rate			39.5	%			39.5	%			39.6	%

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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

-Topic 740

-SubTopic 10

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-Number

-Article

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-Name Accounting Standards Codification

-Paragraph 9

-Section 50

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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-SubTopic 10

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-Name Accounting Standards Codification

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Topic 740

-SubTopic 10

-Publisher FASB

-Number

-Article

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-Name Accounting Standards Codification

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