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Summary of Information by Reportable Segment (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2013
Mar. 31, 2012
Sep. 30, 2012
Revenues          
Consolidated Revenues $ 95,075 $ 106,240 $ 193,516 $ 212,667  
Income (loss) from operations          
Income from operation (1,939) 3,015 4,067 10,342  
Depreciation and amortization          
Consolidated Depreciation and amortization 5,627 5,983 11,349 12,276  
Net income (loss)          
Consolidated Net income (loss) (920) 1,932 2,642 6,411  
Goodwill          
Goodwill 20,579 20,579 20,579 20,579 20,579
Total assets          
Total assets 257,095 267,605 257,095 267,605 268,158
Postsecondary education
         
Revenues          
Consolidated Revenues 93,243 103,788 189,163 207,941  
Income (loss) from operations          
Income from operation (1,333) 3,599 5,323 11,411  
Depreciation and amortization          
Consolidated Depreciation and amortization 5,541 5,869 11,162 12,040  
Net income (loss)          
Consolidated Net income (loss) (575) 2,265 3,359 7,015  
Goodwill          
Goodwill 20,579 20,579 20,579 20,579  
Total assets          
Total assets 250,282 264,938 250,282 264,938  
Other
         
Revenues          
Consolidated Revenues 1,832 2,452 4,353 4,726  
Income (loss) from operations          
Income from operation (606) (584) (1,256) (1,069)  
Depreciation and amortization          
Consolidated Depreciation and amortization 86 114 187 236  
Net income (loss)          
Consolidated Net income (loss) (345) (333) (717) (604)  
Total assets          
Total assets $ 6,813 $ 2,667 $ 6,813 $ 2,667