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Pensions and Postretirement Benefits
 6 Months Ended
May 31, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]  
Pensions and Postretirement Benefits [Text Block]
Pensions and Postretirement Benefits

Our net periodic pension expense for the three and six months ended May 31, 2016 and 2015 consisted of the following (in thousands): 
 
Three months ended May 31,
 
Six months ended May 31,
 
2016
 
2015
 
2016
 
2015
Service costs incurred
$
391

 
$
494

 
$
782

 
$
989

Interest costs on projected benefit obligation
2,077

 
2,070

 
4,149

 
4,147

Expected return on plan assets
(2,158
)
 
(2,168
)
 
(4,310
)
 
(4,345
)
Net periodic pension expense
$
310

 
$
396

 
$
621

 
$
791

Our net periodic postretirement expense for the three and six months ended May 31, 2016 and 2015 consisted of the following (in thousands):
 
Three months ended May 31,
 
Six months ended May 31,
 
2016
 
2015
 
2016
 
2015
Service costs incurred
$
2

 
$
4

 
$
4

 
$
8

Interest costs
94

 
97

 
188

 
194

Net periodic postretirement expense
$
96

 
$
101

 
$
192

 
$
202