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Stock-Based Compensation (Stock-Settled Stock Appreciation Rights Granted Details) (Details) (Stock Settled Stock Appreciation Rights SARS [Member], USD $)
In Thousands, except Per Share data, unless otherwise specified
9 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Stock Settled Stock Appreciation Rights SARS [Member]
   
SSSARs granted 185 94
Weighted average fair value per right $ 9.08 $ 10.12
Assumptions used in fair value calculations    
Risk-free interest rate 0.41% 1.27%
Dividend yield 2.11% 2.28%
Volatility factor of the expected market price of our common stock 24.31% 28.78%
Weighted average expected life 2 years 9 months 4 days 3 years 1 month 10 days
Estimated forfeiture rate 4.00% 4.00%