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Pension Plans and Other Post Retirement Benefits - Additional Information (Details) - Pension Plan
12 Months Ended
Jun. 30, 2018
USD ($)
CDT defined benefit plan  
Assumptions:  
Contributions made by employer to plan $ 0
Amount to be amortized from accumulated other comprehensive income (loss) over the next fiscal year 700,000
GXS GER defined benefit plan  
Assumptions:  
Contributions made by employer to plan 0
Amount to be amortized from accumulated other comprehensive income (loss) over the next fiscal year 100,000
GXS PHP defined benefit plan  
Assumptions:  
Contributions made by employer to plan 0
Amount to be amortized from accumulated other comprehensive income (loss) over the next fiscal year 600,000
Fair value of plan assets $ 32,000