Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Fair Value Assumptions) (Details)

v2.4.0.6
Stock-Based Compensation (Fair Value Assumptions) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 6 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Jun. 30, 2011
Total cash received from employees for the issuance of shares under the ESPP $ 19,195 $ 16,176 $ 19,195 $ 16,176  
ESPP maximum employee subscription rate 10.00%   10.00%    
Share-based compensation arrangement, discount from market price, lesser of commencement of offering period or purchase date 85.00%        
ESPP maximum annual share replenishment         2,000,000
ESPP share replenishment In period 0   0   2,000,000
Number of ESPP shares available for future issuance 2,900,000   2,900,000    
ESPP offering period, in months 6        
Share-based Compensation Arrangement, Fair Value Assumptions and Methodology [Abstract]          
Expected stock price volatility 32.70% 41.00% 32.70% 41.00%  
Risk-free interest rate 0.10% 0.20% 0.10% 0.20%  
Dividend yield 3.40% 3.70% 3.40% 3.70%  
Expected life of options (in years) 0.50 0.50 0.50 0.50  
Employee Stock Purchase Plan Additional Information [Abstract]          
Tax benefits realized in connection with the disqualifying dispositions of shares purchased under the ESPP $ 368 $ 115 $ 843 $ 471  
Weighted average fair value per share based on Black-Scholes model $ 9.16 $ 6.53 $ 9.16 $ 6.53  
Share-based Compensation Arrangement by Share-based Payment Award, Shares Purchased for Award 545,000 701,000 545,000 701,000