Quarterly report pursuant to Section 13 or 15(d)

Equity and Long-Term Incentive Compensation Plans - Cash Dividends (Details)

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Equity and Long-Term Incentive Compensation Plans - Cash Dividends (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Sep. 01, 2017
Aug. 03, 2017
Dec. 09, 2014
Nov. 19, 2014
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2014
Jun. 30, 2017
Dividends Payable                
Cash dividends declared (in dollars per share)         $ 0.59 $ 0.52    
Payment of dividends         $ 100,327 $ 89,313    
Dividends payable         7,011 12,045    
Restricted stock unit, Performance-based and Service-based                
Dividends Payable                
Dividends payable         7,000      
Regular cash dividend                
Dividends Payable                
Cash dividends declared (in dollars per share)   $ 0.59            
Cash dividends paid per share (in dollars per share) $ 0.59              
Regular cash dividend | Restricted stock unit, Performance-based and Service-based                
Dividends Payable                
Dividends payable         4,200     $ 4,800
Regular cash dividend | Additional paid-in capital                
Dividends Payable                
Payment of dividends         94,100 81,600    
Special cash dividend                
Dividends Payable                
Cash dividends declared (in dollars per share)       $ 16.50        
Cash dividends paid per share (in dollars per share)     $ 16.50          
Cash dividends paid             $ 2,760,000  
Special cash dividend | Restricted stock unit, Performance-based and Service-based                
Dividends Payable                
Dividends payable         2,800   $ 43,000 $ 9,000
Cash dividends paid         $ 6,200 $ 7,700