Share Capital, Option Plans And Share-Based Payments (Summary Of Outstanding Stock Options) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
Sep. 30, 2011 years	Sep. 30, 2010
Share Capital, Option Plans And Share-Based Payments [Abstract]
Options outstanding beginning balance	2,277,733
Options granted	120,000	0
Options exercised to date	(475,181)
Options forfeited or expired	(500)
Options outstanding ending balance	1,922,052
Options exercisable	1,325,627
Options outstanding beginning balance, weighted-average exercise price	$ 24.51
Options granted, weighted-average exercise price	$ 52.15
Options exercised, weighted-average exercise price	$ 15.19
Options forfeited or expired, weighted-average exercise price	$ 17.99
Options outstanding ending balance, weighted-average exercise price	$ 28.54
Options exercisable, weighted-average exercise price	$ 22.53
Options outstanding, weighted-average remaining contractual term (years)	3.33
Options exercisable, weighted-average remaining contractual term (years)	2.48
Options exercisable, aggregate intrinsic value	$ 45,565
Options exercisable, aggregate intrinsic value	$ 39,224

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The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of vested portions of options outstanding and currently exercisable under the option plan as of the balance sheet date.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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The weighted average period between the balance sheet date and expiration for all vested portions of options outstanding and currently exercisable (or convertible) under the plan, which may be expressed in a decimal value for number of years.

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The weighted average price at which option holders acquired shares when converting their stock options into shares under the plan during the reporting period.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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The combined weighted average exercise price associated with stock options during the period that have either lapsed or been forfeited.

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Net number of share options (or share units) granted during the period.

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The weighted average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on stock options awarded under the plan during the reporting period.

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The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices pertaining to options outstanding under the plan as of the balance sheet date.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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The weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan.

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The weighted average period between the balance sheet date and expiration for all awards outstanding under the plan, which may be expressed in a decimal value for number of years.

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Number of share options (or share units) exercised during the current period.

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