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Employee Benefit Plans (Tables)
6 Months Ended
Jun. 30, 2019
Retirement Benefits [Abstract]  
Components of Net Periodic Benefit Cost
The following table presents the components of net periodic benefit cost (in thousands):
Three Months Ended June 30,Six Months Ended June 30,
2019201820192018
Service cost$65 $338 $130 $676 
Interest cost151 117 302 234 
Net periodic benefit cost$216 $455 $432 $910