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Employee Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2015
Weighted Average Discount Rate [Line Items]  
Projected benefit obligations and plan assets of the pension plans
The table below summarizes the balances of the projected benefit obligation and fair value of the plan assets at December 31, 2015 and 2014 (in thousands):
 
December 31,
 
2015
 
2014
Projected benefit obligation
$
23,865

 
$
29,266

Fair value of plan assets
22,204

 
26,368

Funded status:
$
(1,661
)
 
$
(2,898
)