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Segment Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2016
Mar. 31, 2015
Sep. 30, 2015
Segment Reporting Information [Line Items]          
Depreciation on training equipment obtained in exchange for services $ 300 $ 300 $ 602 $ 600  
Revenues          
Revenues 88,192 91,235 177,965 186,915  
Income (loss) from operations          
Income (loss) from operations (5,770) 2,402 (7,963) 8,002  
Depreciation and amortization          
Depreciation and amortization     7,682 8,859  
Total Depreciation and Amortization 4,640 4,840 9,023 9,790  
Net income (loss)          
Net income (loss) (32,002) 555 (33,682) 3,649  
Goodwill          
Goodwill 9,005   9,005   $ 8,222
Assets          
Total assets 229,862   229,862   274,302
Postsecondary education          
Revenues          
Revenues 84,737 88,101 171,402 181,003  
Income (loss) from operations          
Income (loss) from operations (4,693) 2,902 (5,909) 9,351  
Depreciation and amortization          
Depreciation and amortization 4,402 4,774 8,722 9,649  
Net income (loss)          
Net income (loss) (31,714) 761 (32,940) 4,262  
Goodwill          
Goodwill 8,222   8,222   8,222
Assets          
Total assets 221,005   221,005   266,922
Other          
Revenues          
Revenues 3,455 3,134 6,563 5,912  
Income (loss) from operations          
Income (loss) from operations (1,077) (500) (2,054) (1,349)  
Depreciation and amortization          
Depreciation and amortization 238 66 301 141  
Net income (loss)          
Net income (loss) (288) $ (206) (742) $ (613)  
Goodwill          
Goodwill 783   783   0
Assets          
Total assets $ 8,857   $ 8,857   $ 7,380