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Pension Plans and Other Post Retirement Benefits (Components of Net Pension Expense) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Jun. 30, 2015
Defined Benefit Plan Disclosure [Line Items]          
Service cost     $ 1,250   $ 2,330
Interest cost     732   1,649
Net pension expense     2,325 $ 2,422  
Pension Plan          
Defined Benefit Plan Disclosure [Line Items]          
Service cost $ 613 $ 552 1,250 1,094  
Interest cost 369 441 732 897  
Amortization of actuarial gains and losses 116 105 223 214  
Net pension expense 1,098 1,098 2,205 2,205  
Pension Plan | CDT          
Defined Benefit Plan Disclosure [Line Items]          
Service cost 104 118 211 240 452
Interest cost 151 191 305 390 735
Amortization of actuarial gains and losses 105 105 212 214  
Net pension expense 360 414 728 844  
Pension Plan | GXS Germany          
Defined Benefit Plan Disclosure [Line Items]          
Service cost 85 77 188 157 360
Interest cost 137 182 265 372 625
Amortization of actuarial gains and losses 11 0 11 0  
Net pension expense 233 259 464 529  
Pension Plan | GXS Philippines          
Defined Benefit Plan Disclosure [Line Items]          
Service cost 424 357 851 697 1,518
Interest cost 81 68 162 135 $ 289
Amortization of actuarial gains and losses 0 0 0 0  
Net pension expense $ 505 $ 425 $ 1,013 $ 832