Quarterly report pursuant to Section 13 or 15(d)

Equity and Long-Term Incentive Compensation Plans (Fair Value Assumptions) (Details)

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Equity and Long-Term Incentive Compensation Plans (Fair Value Assumptions) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 6 Months Ended 9 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Jun. 30, 2010
Mar. 31, 2014
Mar. 31, 2013
ESPP maximum employee subscription rate 10.00%     10.00%  
Employee stock purchase plan offering period     6 months    
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     2,000,000  
Number of ESPP shares available for future issuance 1,200,000     1,200,000  
Share-based Compensation Arrangement, Fair Value Assumptions and Methodology [Abstract]          
Expected stock price volatility 25.80% 27.50%   27.50% 28.90%
Risk-free interest rate 0.10% 0.10%   0.10% 0.10%
Dividend yield 2.80% 3.20%   2.90% 3.30%
Expected life of options 6 months 6 months   6 months 6 months
Employee Stock Purchase Plan Additional Information [Abstract]          
Total cash received from employees for the issuance of shares under the ESPP $ 0 $ 0   $ 22,035 $ 20,139
Number of shares purchased by employees through the ESPP 0 0   469,000 496,000
Tax benefits realized by the Company in connection with the disqualifying dispositions of shares purchased under the ESPP $ 1,150 $ 724   $ 2,023 $ 1,398
Weighted-average fair value per share based on Black-Scholes model $ 13.04 $ 10.36   $ 12.29 $ 10.46