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Pension Plan (Tables)
 6 Months Ended
Jun. 30, 2016
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]  
Schedule of Pension Plan Expenses

The components of the expense the Company incurred under the pension plan are as follows (in thousands): 

             
   Three Months Ended   Six Months Ended 
   June 30,   June 30, 
   2016    2015    2016    2015  
Current service cost, net of employee contributions  $12   $14   $23   $29 
Interest cost on accrued benefit obligation   26    27    50    55 
Expected return on plan assets   (41)   (44)   (80)   (85)
Amortization of transitional obligation   3    3    5    5 
Amortization of past service costs   3    2    5    4 
Amortization of net actuarial gain   10    9    18    19 
Total cost of benefit  $13   $11   $21   $27