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Income Taxes (Reconciliation Of Federal And Provincial Income Tax Rate With Effective Income Tax Rate) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2012
Income Tax Disclosure [Abstract]      
Expected statutory rate 26.50% 26.50% 27.25%
Expected provision for income taxes $ 73,282 $ 47,226 $ 37,427
Effect of foreign tax rate differences (52,577) (27,026) (21,496)
Change in valuation allowance 3,281 2,082 15,536
Amortization of deferred charges 11,307 10,922 11,112
Effect of permanent differences 7,643 6,008 6,902
Effect of Canadian to US dollar functional currency election 0 0 (5,887)
Effect of tax reserves 13,214 (13,076) (7,005)
Effect of withholding taxes 2,234 2,847 5,154
Other items 68 8,136 3,324
Impact of internal reorganization of subsidiaries and integration of acquisitions 9 (7,429) (32,896)
Provision for income taxes (note 14) $ 58,461 $ 29,690 $ 12,171