Annual report pursuant to Section 13 and 15(d)

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

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Equity and Long-Term Incentive Compensation Plans - Fair Value Assumptions and ESPP (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
Aug. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
ESPP, maximum employee subscription rate 10.00%      
ESPP, offering period 6 months      
ESPP, discount from market price, lesser of commencement of offering period or purchase date 85.00%      
ESPP Activities [Abstract]        
Total cash received from employees for the issuance of shares under the ESPP $ 41,116 $ 39,675 $ 36,186  
Number of shares purchased by employees through the ESPP 759,000 796,000 877,000  
Tax benefits realized by the Company in connection with the disqualifying dispositions of shares purchased under the ESPP $ 1,741 $ 2,221 $ 1,452  
Weighted-average fair value per share based on Black-Scholes model $ 14.55 $ 12.31 $ 10.46  
ESPP maximum annual share replenishment 2,000,000     2,000,000
Number of ESPP shares available for future issuance 2,100,000      
Employee Stock Purchase Plan        
ESPP, Fair Value Assumptions and Methodology        
Expected stock price volatility 24.50% 27.50% 28.80%  
Risk-free interest rate 0.10% 0.10% 0.10%  
Dividend yield 2.80% 2.90% 3.20%  
Expected life (in years) 6 months 6 months 6 months