Property, Plant And Equipment, Net (Schedule Of Property Plant And Equipment Net) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Jun. 30, 2015
Property, Plant and Equipment [Line Items]
Cost	$ 154,946	$ 146,334
Accumulated depreciation	99,969	94,014
Carrying amount	54,977	52,320
Land [Member]
Property, Plant and Equipment [Line Items]
Cost	851	869
Accumulated depreciation
Carrying amount	851	869
Building And Structures [Member]
Property, Plant and Equipment [Line Items]
Cost	467	477
Accumulated depreciation	151	134
Carrying amount	316	343
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Cost	130,998	121,033
Accumulated depreciation	81,423	75,681
Carrying amount	49,575	45,352
Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Cost	7,262	6,295
Accumulated depreciation	5,048	4,901
Carrying amount	2,214	1,394
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Cost	15,368	17,660
Accumulated depreciation	13,347	13,298
Carrying amount	$ 2,021	$ 4,362