Stock-Based Compensation (Narrative) (Details) (USD $)	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Stock Settled Stock Appreciation Rights SARS [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 2,000,000
Weighted-average period over which remaining compensation cost will be recognized	2 years 22 days
Restricted Stocks [ Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	2,200,000
Weighted-average period over which remaining compensation cost will be recognized	2 years 26 days
Restricted stock granted	32,000
Number vested	14,000
Grant date fair value per award	$ 67.60
Director Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted	7,427
Number vested	8,155	8,435	14,000
Number of nonemployee directors	7
Grant date fair value	500,000
Grant date fair value per award	$ 65.97
Vesting period	1 year
Employee Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted	25,000	7,000	25,000
Number vested	5,650	21,500
Grant date fair value	$ 1,705,000	390,000	1,470,000
Grant date fair value per award	$ 68.08	57.78	58.79
2005 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for issuance to qualified key employees	2,000,000
Maximum term of stock awards granted	5 years