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SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN (Tables)
3 Months Ended
Mar. 31, 2015
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]  
Components of net periodic pension cost
The components of net periodic pension cost were as follows (in thousands):
 
 
Three Months Ended March 31,
 
 
2015
 
2014
Service cost
 
$
229

 
$
167

Interest cost
 
120

 
106

Amortization of prior service cost
 
243

 
146

Total net periodic benefit cost
 
$
592

 
$
419