Annual report pursuant to Section 13 and 15(d)

Goodwill and intangible assets - Schedule of Goodwill (Details)

v3.5.0.2
Goodwill and intangible assets - Schedule of Goodwill (Details) - USD ($)
 3 Months Ended 12 Months Ended
Jul. 01, 2016
Feb. 29, 2016
Dec. 15, 2015
Jul. 01, 2014
Sep. 30, 2016
Sep. 30, 2016
Sep. 30, 2015
Changes in goodwill              
Balance at the beginning of the period           $ 376,302,000 $ 170,626,000
Goodwill, acquired during period           21,453,000  
Foreign currency translation           (7,597,000) (8,649,000)
Balance at the end of the period         $ 397,558,000 397,558,000 376,302,000
Impairment of goodwill related to continuing operations $ 0     $ 0   0 0
Acentia              
Changes in goodwill              
Goodwill, acquired during period         221,949,000   214,325,000
Adjustment to goodwill acquired           7,624,000  
Ascend Management Innovations LLC              
Changes in goodwill              
Goodwill, acquired during period   $ 18,554,000          
Health Services              
Changes in goodwill              
Balance at the beginning of the period           113,427,000 118,721,000
Foreign currency translation           (8,302,000) (5,294,000)
Balance at the end of the period         123,679,000 123,679,000 113,427,000
Health Services | Acentia              
Changes in goodwill              
Goodwill, acquired during period             0
Adjustment to goodwill acquired           0  
Health Services | Ascend Management Innovations LLC              
Changes in goodwill              
Goodwill, acquired during period           18,554,000  
U.S. Federal Services              
Changes in goodwill              
Balance at the beginning of the period           220,524,000 6,199,000
Foreign currency translation           0  
Balance at the end of the period         228,148,000 228,148,000 220,524,000
U.S. Federal Services | Acentia              
Changes in goodwill              
Goodwill, acquired during period             214,325,000
Adjustment to goodwill acquired           7,624,000  
Human Services              
Changes in goodwill              
Balance at the beginning of the period           42,351,000 45,706,000
Foreign currency translation           705,000 (3,355,000)
Balance at the end of the period         $ 45,731,000 45,731,000 $ 42,351,000
Human Services | Acentia              
Changes in goodwill              
Adjustment to goodwill acquired           0  
Human Services | Assessments Australia              
Changes in goodwill              
Goodwill, acquired during period     $ 2,900,000     2,899,000  
K-12 Education              
Changes in goodwill              
Disposal of K-12 Education business           (224,000)  
K-12 Education | U.S. Federal Services              
Changes in goodwill              
Disposal of K-12 Education business           0  
K-12 Education | Human Services              
Changes in goodwill              
Disposal of K-12 Education business           $ (224,000)