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Discontinued Operations (Tables)
 12 Months Ended
May. 31, 2015
Discontinued Operations and Disposal Groups [Abstract]  
Schedule of Discontinued Operations
Following is selected financial information included in net income (loss) from discontinued operations for Storage:
(In thousands)
2015
 
2014
 
2013
 
 
 
 
 
 
Revenue
$
31,379

 
$
82,246

 
$
70,507

 
 
 
 
 
 
(Loss) income before income taxes
(3,712
)
 
815

 
(767
)
Income tax (benefit) expense
(3,232
)
 
658

 
377

Gain on sale of business
38,573

 
—

 
—

Income tax expense on gain
15,552

 
—

 
—

Net income (loss) from discontinued operations
$
22,541

 
$
157

 
$
(1,144
)