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Employee Benefit Plans (Tables)
6 Months Ended
Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract]  
Schedule of net periodic pension expense
     
Three Months
   
Six Months
 
For the Periods Ended December 31
   
2016
   
2015
   
2016
   
2015
 
Service cost – benefits earned during the period
      $ 284         $ 751         $ 845         $ 1,470    
Interest cost on benefit obligation
        505           757           1,048           1,446    
Expected return on plan assets
        (843)           (846)           (1,706)           (1,588)    
Amortization of net actuarial (gain) loss and prior service costs
        105           508           452           892    
Settlement cost
        1,702                     1,702              
Net periodic pension expense
      $ 1,753         $ 1,170         $ 2,341         $ 2,220