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Earnings Per Share (Computation Of Basic And Diluted Earnings Per Share) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 6 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Earnings Per Share [Abstract]        
Net income $ 20,038 $ 16,267 $ 31,728 $ 25,362
Denominator for basic earnings per share - weighted average shares outstanding during the period 44,158 42,929 44,044 42,876
Effect of dilutive stock options and unvested restricted stock 1,494 1,405 1,460 1,250
Denominator for diluted earnings per share - adjusted weighted average shares and assumed conversions 45,652 44,334 45,504 44,126
Basic net income per share $ 0.45 $ 0.38 $ 0.72 $ 0.59
Diluted net income per share $ 0.44 $ 0.37 $ 0.70 $ 0.57