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Discontinued Operations - Assets and Liabilities of Discontinued Operations on Consolidated Balance Sheets (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Cash and cash equivalents $ 62 $ 0 $ 28,844 $ 26,828
Receivables, net 421 736    
Other current assets   142    
Deferred income tax assets 3,450 3,327    
Total current assets 3,933 4,205    
Property and equipment, net 7 69    
Intangible assets, net   900    
Deferred income tax assets 17,083 22,270    
Other assets, net 1,540 1,666    
Total assets of discontinued operations 22,563 29,110    
Accounts payable 8 49    
Accrued expenses 644 613    
Deferred tuition revenue   251    
Remaining lease obligations 9,174 7,981    
Total current liabilities 9,826 8,894    
Remaining lease obligations 33,103 37,980    
Total liabilities of discontinued operations $ 42,929 $ 46,874