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Segment Information (Tables)
 3 Months Ended
Jul. 31, 2012
Segment Information [Abstract]  
Segment information
Segment information is as follows (in thousands):
 
 
For the Three Months
 
 
Ended July 31,
 
 
2012
 
 
2011
 
SCIENTIFIC, TECHNICAL, MEDICAL AND SCHOLARLY
 
 
 
 
 
 
Revenue
 
$
235,946
 
 
$
252,715
 
 
 
 
 
 
 
 
 
Direct Contribution to Profit
 
$
91,263
 
 
$
106,157
 
Allocated Shared Services and Administrative Costs:
 
 
 
 
 
 
 
 
Distribution
 
 
(11,559
)
 
 
(12,391
)
Technology Services
 
 
(16,462
)
 
 
(15,391
)
Occupancy and Other
 
 
(5,719
)
 
 
(5,570
)
Contribution to Profit
 
$
57,523
 
 
$
72,805
 
 
 
 
 
 
 
 
 
PROFESSIONAL/TRADE
 
 
 
 
 
 
 
 
Revenue
 
$
101,973
 
 
$
99,025
 
 
 
 
 
 
 
 
 
Direct Contribution to Profit
 
$
21,206
 
 
$
21,960
 
Allocated Shared Services and Administrative Costs:
 
 
 
 
 
 
 
 
Distribution
 
 
(10,374
)
 
 
(11,428
)
Technology Services
 
 
(7,179
)
 
 
(5,966
)
Occupancy and Other
 
 
(3,336
)
 
 
(3,755
)
Contribution to Profit
 
$
317
 
 
$
811
 
 
 
 
 
 
 
 
 
GLOBAL EDUCATION
 
 
 
 
 
 
 
 
Revenue
 
$
72,815
 
 
$
78,329
 
 
 
 
 
 
 
 
 
Direct Contribution to Profit
 
$
21,903
 
 
$
27,745
 
Allocated Shared Services and Administrative Costs:
 
 
 
 
 
 
 
 
Distribution
 
 
(3,793
)
 
 
(3,710
)
Technology Services
 
 
(7,358
)
 
 
(6,169
)
Occupancy and Other
 
 
(1,884
)
 
 
(1,770
)
Contribution to Profit
 
$
8,868
 
 
$
16,096
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total Contribution to Profit
 
$
66,708
 
 
$
89,712
 
Unallocated Shared Services and Administrative Costs
 
 
(27,713
)
 
 
(29,560
) 
Operating Income
 
$
38,995
 
 
$
60,152