| Segment Information | 
Segment Information 
The table below provides certain financial information for each of our business segments.  
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   | 
Three Months Ended March 31,  | 
   | 
Six Months Ended March 31,  | 
 
(dollars in thousands)  | 
   | 
2017  | 
   | 
% (1)  | 
   | 
2016  | 
   | 
% (1)  | 
   | 
2017  | 
   | 
% (1)  | 
   | 
2016  | 
   | 
% (1)  | 
 
Revenue:  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
 
Health Services  | 
   | 
$  | 
348,994  | 
 
  | 
   | 
100  | 
%  | 
   | 
$  | 
330,567  | 
 
  | 
   | 
100  | 
%  | 
   | 
$  | 
689,723  | 
 
  | 
   | 
100  | 
%  | 
   | 
$  | 
622,470  | 
 
  | 
   | 
100  | 
%  | 
 
U.S. Federal Services  | 
   | 
145,370  | 
 
  | 
   | 
100  | 
%  | 
   | 
150,191  | 
 
  | 
   | 
100  | 
%  | 
   | 
286,668  | 
 
  | 
   | 
100  | 
%  | 
   | 
295,476  | 
 
  | 
   | 
100  | 
%  | 
 
Human Services  | 
   | 
127,683  | 
 
  | 
   | 
100  | 
%  | 
   | 
125,695  | 
 
  | 
   | 
100  | 
%  | 
   | 
253,220  | 
 
  | 
   | 
100  | 
%  | 
   | 
245,229  | 
 
  | 
   | 
100  | 
%  | 
 
Total  | 
   | 
$  | 
622,047  | 
 
  | 
   | 
100  | 
%  | 
   | 
$  | 
606,453  | 
 
  | 
   | 
100  | 
%  | 
   | 
$  | 
1,229,611  | 
 
  | 
   | 
100  | 
%  | 
   | 
$  | 
1,163,175  | 
 
  | 
   | 
100  | 
%  | 
 
Gross profit:  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
 
Health Services  | 
   | 
$  | 
86,454  | 
 
  | 
   | 
24.8  | 
%  | 
   | 
$  | 
82,717  | 
 
  | 
   | 
25.0  | 
%  | 
   | 
$  | 
164,688  | 
 
  | 
   | 
23.9  | 
%  | 
   | 
$  | 
134,689  | 
 
  | 
   | 
21.6  | 
%  | 
 
U.S. Federal Services  | 
   | 
36,571  | 
 
  | 
   | 
25.2  | 
%  | 
   | 
33,421  | 
 
  | 
   | 
22.3  | 
%  | 
   | 
74,147  | 
 
  | 
   | 
25.9  | 
%  | 
   | 
61,659  | 
 
  | 
   | 
20.9  | 
%  | 
 
Human Services  | 
   | 
29,292  | 
 
  | 
   | 
22.9  | 
%  | 
   | 
31,529  | 
 
  | 
   | 
25.1  | 
%  | 
   | 
58,300  | 
 
  | 
   | 
23.0  | 
%  | 
   | 
61,534  | 
 
  | 
   | 
25.1  | 
%  | 
 
Total  | 
   | 
$  | 
152,317  | 
 
  | 
   | 
24.5  | 
%  | 
   | 
$  | 
147,667  | 
 
  | 
   | 
24.3  | 
%  | 
   | 
$  | 
297,135  | 
 
  | 
   | 
24.2  | 
%  | 
   | 
$  | 
257,882  | 
 
  | 
   | 
22.2  | 
%  | 
 
| 
 Selling, general and administrative  
expense: 
 | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
 
Health Services  | 
   | 
$  | 
29,914  | 
 
  | 
   | 
8.6  | 
%  | 
   | 
$  | 
25,803  | 
 
  | 
   | 
7.8  | 
%  | 
   | 
$  | 
58,021  | 
 
  | 
   | 
8.4  | 
%  | 
   | 
$  | 
50,967  | 
 
  | 
   | 
8.2  | 
%  | 
 
U.S. Federal Services  | 
   | 
18,927  | 
 
  | 
   | 
13.0  | 
%  | 
   | 
18,438  | 
 
  | 
   | 
12.3  | 
%  | 
   | 
38,622  | 
 
  | 
   | 
13.5  | 
%  | 
   | 
35,960  | 
 
  | 
   | 
12.2  | 
%  | 
 
Human Services  | 
   | 
19,663  | 
 
  | 
   | 
15.4  | 
%  | 
   | 
21,735  | 
 
  | 
   | 
17.3  | 
%  | 
   | 
36,902  | 
 
  | 
   | 
14.6  | 
%  | 
   | 
42,633  | 
 
  | 
   | 
17.4  | 
%  | 
 
Other (4)   | 
   | 
92  | 
 
  | 
   | 
NM  | 
 
  | 
   | 
—  | 
 
  | 
   | 
NM  | 
 
  | 
   | 
449  | 
 
  | 
   | 
NM  | 
 
  | 
   | 
650  | 
 
  | 
   | 
NM  | 
 
  | 
 
Total  | 
   | 
$  | 
68,596  | 
 
  | 
   | 
11.0  | 
%  | 
   | 
$  | 
65,976  | 
 
  | 
   | 
10.9  | 
%  | 
   | 
$  | 
133,994  | 
 
  | 
   | 
10.9  | 
%  | 
   | 
$  | 
130,210  | 
 
  | 
   | 
11.2  | 
%  | 
 
Operating income:  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
   | 
   | 
 
  | 
 
Health Services  | 
   | 
$  | 
56,540  | 
 
  | 
   | 
16.2  | 
%  | 
   | 
$  | 
56,914  | 
 
  | 
   | 
17.2  | 
%  | 
   | 
$  | 
106,667  | 
 
  | 
   | 
15.5  | 
%  | 
   | 
$  | 
83,722  | 
 
  | 
   | 
13.4  | 
%  | 
 
U.S. Federal Services  | 
   | 
17,644  | 
 
  | 
   | 
12.1  | 
%  | 
   | 
14,983  | 
 
  | 
   | 
10.0  | 
%  | 
   | 
35,525  | 
 
  | 
   | 
12.4  | 
%  | 
   | 
25,699  | 
 
  | 
   | 
8.7  | 
%  | 
 
Human Services  | 
   | 
9,629  | 
 
  | 
   | 
7.5  | 
%  | 
   | 
9,794  | 
 
  | 
   | 
7.8  | 
%  | 
   | 
21,398  | 
 
  | 
   | 
8.5  | 
%  | 
   | 
18,901  | 
 
  | 
   | 
7.7  | 
%  | 
 
Amortization of intangible assets  | 
   | 
(3,386  | 
)  | 
   | 
NM  | 
 
  | 
   | 
(3,262  | 
)  | 
   | 
NM  | 
 
  | 
   | 
(6,788  | 
)  | 
   | 
NM  | 
 
  | 
   | 
(6,411  | 
)  | 
   | 
NM  | 
 
  | 
 
Restructuring costs (2)  | 
   | 
—  | 
 
  | 
   | 
NM  | 
 
  | 
   | 
—  | 
 
  | 
   | 
NM  | 
 
  | 
   | 
(2,242  | 
)  | 
   | 
NM  | 
 
  | 
   | 
—  | 
 
  | 
   | 
NM  | 
 
  | 
 
Acquisition-related expenses (3)  | 
   | 
—  | 
 
  | 
   | 
NM  | 
 
  | 
   | 
(529  | 
)  | 
   | 
NM  | 
 
  | 
   | 
—  | 
 
  | 
   | 
NM  | 
 
  | 
   | 
(575  | 
)  | 
   | 
NM  | 
 
  | 
 
Other (4)  | 
   | 
(92  | 
)  | 
   | 
NM  | 
 
  | 
   | 
—  | 
 
  | 
   | 
NM  | 
 
  | 
   | 
(449  | 
)  | 
   | 
NM  | 
 
  | 
   | 
(650  | 
)  | 
   | 
NM  | 
 
  | 
 
Total  | 
   | 
$  | 
80,335  | 
 
  | 
   | 
12.9  | 
%  | 
   | 
$  | 
77,900  | 
 
  | 
   | 
12.8  | 
%  | 
   | 
$  | 
154,111  | 
 
  | 
   | 
12.5  | 
%  | 
   | 
$  | 
120,686  | 
 
  | 
   | 
10.4  | 
%  | 
 
  
(1)    Percentage of respective segment revenue. Percentages not considered meaningful are marked “NM.” 
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(2)  | 
During the current fiscal year, we incurred costs in restructuring our United Kingdom Human Services business. See "Note 6. Supplemental disclosures" for more information.  | 
 
 
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(3)  | 
Acquisition-related expenses relate to the acquisitions of Assessments Australia and Ascend in December 2015 and February 2016, respectively.  | 
 
 
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(4) 
  | 
During the six months ended March 31, 2017, we incurred $0.4 million of legal-related costs pertaining to a legacy matter from a business line that the Company exited. During the six months ended March 31, 2016, we incurred $0.7 million of legal costs related to a matter that occurred in fiscal year 2014. Both items are classified within other selling general and administrative expense.
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