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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
Mar. 31, 2019
Jun. 30, 2018
Assumptions:    
Total benefit obligation $ 73,814 $ 67,981
Current portion of benefit obligation 2,251 2,262
Non-current portion of benefit obligation 71,563 65,719
Pension Plan | CDT defined benefit plan    
Assumptions:    
Total benefit obligation 35,145 32,651
Current portion of benefit obligation 669 655
Non-current portion of benefit obligation 34,476 31,996
Pension Plan | GXS GER defined benefit plan    
Assumptions:    
Total benefit obligation 27,224 25,382
Current portion of benefit obligation 1,002 1,027
Non-current portion of benefit obligation 26,222 24,355
Pension Plan | GXS PHP defined benefit plan    
Assumptions:    
Total benefit obligation 5,556 3,853
Current portion of benefit obligation 155 138
Non-current portion of benefit obligation 5,401 3,715
Other plans    
Assumptions:    
Total benefit obligation 5,889 6,095
Current portion of benefit obligation 425 442
Non-current portion of benefit obligation $ 5,464 $ 5,653