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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
Jun. 30, 2018
Jun. 30, 2017
Assumptions:    
Total benefit obligation $ 67,981 $ 60,362
Current portion of benefit obligation 2,262 1,735
Non-current portion of benefit obligation 65,719 58,627
Pension Plan | CDT defined benefit plan    
Assumptions:    
Total benefit obligation 32,651 28,881
Current portion of benefit obligation 655 583
Non-current portion of benefit obligation 31,996 28,298
Pension Plan | GXS GER defined benefit plan    
Assumptions:    
Total benefit obligation 25,382 23,730
Current portion of benefit obligation 1,027 926
Non-current portion of benefit obligation 24,355 22,804
Pension Plan | GXS PHP defined benefit plan    
Assumptions:    
Total benefit obligation 3,853 4,495
Current portion of benefit obligation 138 81
Non-current portion of benefit obligation 3,715 4,414
Other plans    
Assumptions:    
Total benefit obligation 6,095 3,256
Current portion of benefit obligation 442 145
Non-current portion of benefit obligation $ 5,653 $ 3,111