Annual report pursuant to Section 13 and 15(d)

Goodwill and intangible assets (Details)

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Goodwill and intangible assets (Details) (USD $)
 0 Months Ended 12 Months Ended
Jul. 02, 2013
Sep. 30, 2013
Sep. 30, 2012
Changes in goodwill      
Balance at the beginning of the period   $ 112,032,000 $ 71,323,000
Goodwill acquired   58,316,000 39,161,000
Adjustment to goodwill acquired with PSI   129,000  
Foreign currency translation   1,390,000 1,548,000
Balance at the end of the period   171,867,000 112,032,000
Impairment of goodwill related to continuing operations 0 0 0
HML
      
Changes in goodwill      
Balance at the end of the period 58,316,000    
Policy Studies, Inc
      
Changes in goodwill      
Balance at the end of the period   39,290,000  
Health Services
      
Changes in goodwill      
Balance at the beginning of the period   63,517,000 43,242,000
Adjustment to goodwill acquired with PSI   65,000  
Foreign currency translation   3,198,000 377,000
Balance at the end of the period   125,096,000 63,517,000
Health Services | HML
      
Changes in goodwill      
Goodwill acquired   58,316,000  
Health Services | Policy Studies, Inc
      
Changes in goodwill      
Goodwill acquired     19,898,000
Human Services
      
Changes in goodwill      
Balance at the beginning of the period   48,515,000 28,081,000
Adjustment to goodwill acquired with PSI   64,000  
Foreign currency translation   (1,808,000) 1,171,000
Balance at the end of the period   46,771,000 48,515,000
Human Services | Policy Studies, Inc
      
Changes in goodwill      
Goodwill acquired     $ 19,263,000