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Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Schedule of operating expenses, reported and reclassified on consolidated statements of income |  |  |
Instruction and educational support | $ 300,098 | $ 292,003 | $ 269,557
Marketing | 71,864 | 74,293 | 70,270
Admissions advisory | 26,374 | 26,531 | 25,277
General and administration | 50,056 | 55,464 | 55,857
As Reported [Member] |  |  |
Schedule of operating expenses, reported and reclassified on consolidated statements of income |  |  |
Instruction and educational support |  |  | 205,212
Marketing |  |  | 114,164
Admissions advisory |  |  |
General and administration |  |  | 101,585
Operating expenses |  |  | 420,961
As Reclassified [Member] |  |  |
Schedule of operating expenses, reported and reclassified on consolidated statements of income |  |  |
Instruction and educational support |  |  | 269,557
Marketing |  |  | 70,270
Admissions advisory |  |  | 25,277
General and administration |  |  | 55,857
Operating expenses |  |  | $ 420,961

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- Definition Total costs related to services rendered by an entity during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 2 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(d)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense. + References No definition available. + Details
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- Definition The aggregate total amount of expenses directly related to the marketing or selling of products or services. + References No definition available. + Details
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