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Goodwill (Tables)
 6 Months Ended
Oct. 26, 2013
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
The changes in the carrying amount of goodwill related to each reportable segment for the six months ended October 26, 2013 were as follows: 
 
Live Events
 
Commercial
 
Transportation
 
International
 
Total
Balance as of April 27, 2013:
$
2,417

 
$
725

 
$
164

 
$
—

 
$
3,306

Acquisition, net of cash acquired
—

 
—

 
—

 
1,321

 
1,321

Foreign currency translation
(8
)
 
—

 
(8
)
 
71

 
55

Balance as of October 26, 2013:
$
2,409

 
$
725

 
$
156

 
$
1,392

 
$
4,682