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Long-Term Debt (Tables)
 12 Months Ended
May 31, 2014
Debt Disclosure [Abstract]  
Summary of long-term debt
Following is a summary of long-term debt as of May 31, 2014 and 2013 (in thousands):
 
 
May 31, 2014
 
May 31, 2013
Bank notes
$
142,660

 
$
142,500

Less: current maturities
(5,000
)
 
(7,500
)
Long-term debt
$
137,660

 
$
135,000
Future minimum principal payments on long-term debt
As of May 31, 2014, future minimum principal payments on long-term debt were as follows (in thousands):
 
2015
$
5,000

2016
8,750

2017
13,750

2018
26,250

2019
42,500

 
$
96,250