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Goodwill and Intangible Assets (Tables)
 6 Months Ended
Nov. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill by Segment
djustments to goodwill for the six months ended November 30, 2015. 
Intangible Assets
As of November 30, 2015 and May 31, 2015, intangible assets consisted of the following:
 
November 30, 2015
 
Gross
carrying
value
 
Accumulated
amortization
 
Net carrying
value
 
Weighted
avg useful
life
 
(in thousands)
 
(years)
Product technologies
$
148,390

 
$
(46,355
)
 
$
102,035

 
10.2
Customer relationships
86,322

 
(44,895
)
 
41,427

 
12.0
Trademarks
28,545

 
(4,696
)
 
23,849

 
10.7
In process R&D acquired
3,600

 
—

 
3,600

 
Indefinite
Licenses
7,913

 
(6,313
)
 
1,600

 
7.6
Distributor relationships
900

 
(900
)
 
—

 
3.0
 
$
275,670

 
$
(103,159
)
 
$
172,511

 
 

 
May 31, 2015
 
Gross
carrying
value
 
Accumulated
amortization
 
Net carrying
value
 
Weighted
avg useful
life
 
(in thousands)
 
(years)
Product technologies
$
148,776

 
$
(41,447
)
 
$
107,329

 
10.2
Customer relationships
86,371

 
(42,813
)
 
43,558

 
12.0
Trademarks
28,545

 
(3,229
)
 
25,316

 
10.7
In process R&D acquired
3,600

 
—

 
3,600

 
Indefinite
Licenses
7,913

 
(5,910
)
 
2,003

 
8.3
Distributor relationships
900

 
(900
)
 
—

 
3.0
 
$
276,105

 
$
(94,299
)
 
$
181,806