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Defined Benefit Pension Plan (Tables)
6 Months Ended
Mar. 31, 2020
Retirement Benefits [Abstract]  
Schedule of net periodic benefit cost recognized
The net periodic benefit, other than service costs, is recognized within Interest other income, net in the Consolidated Statements of Operations, and for the three and six months ended March 31, 2020 and 2019 included the following components:

 Three Months Ended March 31,Six Months Ended March 31,
(in thousands)2020201920202019
Service cost$—  $—  $—  $—  
Interest cost109  154  217  $311  
Expected return on plan assets(204) (229) (404) (473) 
Amortization of prior service cost —  10  —  
Total net periodic (benefit)$(90) $(75) $(177) $(162)