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Other Property (Tables)
 12 Months Ended
May. 31, 2015
Property, Plant and Equipment [Abstract]  
Other Property
Other property, at cost, consisted of the following at May 31:
 
2015
 
2014
Land
$
6,985

 
$
6,985

Buildings
15,895

 
15,784

Furniture and other equipment
6,733

 
9,118

Leasehold improvements
256

 
218

 
29,869

 
32,105

Less—accumulated depreciation and amortization
(16,749
)
 
(18,983
)
 
$
13,120

 
$
13,122