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Property, Plant And Equipment, Net (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Jun. 30, 2014
Property, Plant and Equipment [Line Items]    
Cost $ 146,334 $ 139,219
Accumulated depreciation 94,014 91,422
Carrying amount 52,320 47,797
Land [Member]    
Property, Plant and Equipment [Line Items]    
Cost $ 869 $ 967
Accumulated depreciation    
Carrying amount $ 869 $ 967
Building And Structures [Member]    
Property, Plant and Equipment [Line Items]    
Cost 477 530
Accumulated depreciation 134 128
Carrying amount 343 402
Computer Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Cost 121,033 110,393
Accumulated depreciation 75,681 73,908
Carrying amount 45,352 36,485
Office Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Cost 6,295 6,686
Accumulated depreciation 4,901 4,799
Carrying amount 1,394 1,887
Vehicles [Member]    
Property, Plant and Equipment [Line Items]    
Cost 17,660 20,575
Accumulated depreciation 13,298 12,519
Carrying amount $ 4,362 8,056
Plant And Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Cost   68
Accumulated depreciation   $ 68