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Pension Plan (Tables)
3 Months Ended
Dec. 31, 2018
Retirement Benefits [Abstract]  
Schedule of defined benefit plans

For the three months ended December 31, 2018 and 2017, the components of total periodic benefit costs were as follows:

  

    Three Months Ended  
    December 31,  
    2018     2017  
Components of net periodic benefit:            
             
Interest cost   $ 674     $ 725  
Expected return on plan assets     (909 )     (916 )
Net periodic benefit   $ (235 )   $ (191 )