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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, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Disposal Group Including Discontinued Operation Balance Sheet Disclosures [Abstract]        
Cash and cash equivalents   $ 127,738 $ 109,371 $ 116,945
Receivables, net 213 16,928    
Other current assets 50 6,458    
Deferred income tax assets, net   3,454    
Total current assets 263 154,578    
Property and equipment, net   29,790    
Goodwill   45,669    
Intangible assets, net   5,675    
Deferred income tax assets   17,804    
Other assets, net 1,200 4,606    
Total assets of discontinued operations 1,463 258,122    
Current maturities of capital lease obligations   211    
Accounts payable 10 6,378    
Accrued expenses 325 18,110    
Deferred tuition revenue   42,363    
Remaining lease obligations 11,275 9,174    
Total current liabilities 11,610 76,236    
Remaining lease obligations 27,507 33,103    
Other 75 2,836    
Total liabilities of discontinued operations $ 39,192 $ 112,175