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Pension Plans and Other Post Retirement Benefits - Schedule of Defined Benefit Plans and Long-Term Employee Benefit Obligations (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Jun. 30, 2019
Assumptions:    
Total benefit obligation $ 79,690 $ 77,531
Current portion of benefit obligation 2,220 2,292
Non-current portion of benefit obligation 77,470 75,239
Pension Plan | CDT defined benefit plan    
Assumptions:    
Total benefit obligation 37,315 35,836
Current portion of benefit obligation 676 675
Non-current portion of benefit obligation 36,639 35,161
Pension Plan | GXS GER defined benefit plan    
Assumptions:    
Total benefit obligation 27,665 26,739
Current portion of benefit obligation 978 1,012
Non-current portion of benefit obligation 26,687 25,727
Pension Plan | GXS PHP defined benefit plan    
Assumptions:    
Total benefit obligation 6,913 6,904
Current portion of benefit obligation 78 124
Non-current portion of benefit obligation 6,835 6,780
Other plans    
Assumptions:    
Total benefit obligation 7,797 8,052
Current portion of benefit obligation 488 481
Non-current portion of benefit obligation $ 7,309 $ 7,571