Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets (Detail)

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Goodwill and Intangible Assets (Detail) (USD $)
 0 Months Ended 12 Months Ended
Jul. 01, 2014
Sep. 30, 2014
Sep. 30, 2013
Changes in goodwill      
Balance at the beginning of the period   $ 171,867,000 $ 112,032,000
Foreign currency translation   (1,272,000) 1,390,000
Balance at the end of the period   170,626,000 171,867,000
Impairment of goodwill related to continuing operations 0 0 0
HML
      
Changes in goodwill      
Goodwill acquired   31,000 58,316,000
Balance at the end of the period   58,347,000  
Policy Studies, Inc
      
Changes in goodwill      
Adjustment to goodwill acquired     129,000
Health Services
      
Changes in goodwill      
Balance at the beginning of the period   125,096,000 63,517,000
Foreign currency translation   (207,000) 3,198,000
Balance at the end of the period   124,920,000 125,096,000
Health Services | HML
      
Changes in goodwill      
Goodwill acquired     58,316,000
Adjustment to goodwill acquired   31,000  
Health Services | Policy Studies, Inc
      
Changes in goodwill      
Adjustment to goodwill acquired     65,000
Human Services
      
Changes in goodwill      
Balance at the beginning of the period   46,771,000 48,515,000
Foreign currency translation   (1,065,000) (1,808,000)
Balance at the end of the period   45,706,000 46,771,000
Human Services | Policy Studies, Inc
      
Changes in goodwill      
Adjustment to goodwill acquired     $ 64,000