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9. Employee Benefits (Tables)
3 Months Ended
Mar. 31, 2016
Employee Benefits  
Net periodic cost (benefit)
   Three Months Ended 
   March 31, 
   2016   2015 
   (In thousands) 
Components of net periodic cost (benefit)        
Service cost  $   $ 
Interest cost   221    211 
Expected return on assets   (300)   (377)
Amortization of transition (asset)/obligation        
Amortization of net (gain) / loss   138    87 
Net periodic cost (benefit)  $59   $(79)