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Employee Retirement Plans (Tables)
3 Months Ended
Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract]  
Schedule of Net Benefit Costs [Table Text Block]
The components of the Company’s net pension expense were as follows:
 
 
 
Three Months Ended March 31,
 
 
 
2015
 
2014
 
 
 
(Dollars in thousands)
 
Benefits earned during the period
 
$
411
 
$
391
 
Interest cost on projected benefit obligation
 
 
673
 
 
663
 
Expected return on plan assets
 
 
(592)
 
 
(573)
 
Net amortization and deferral
 
 
445
 
 
197
 
Net pension expense
 
$
937
 
$
678