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 6 Months Ended
Dec. 01, 2017
Nov. 01, 2017
Dec. 09, 2014
Nov. 19, 2014
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2014
Dec. 31, 2017
Dec. 31, 2016
Jun. 30, 2017
Dividends Payable                    
Cash dividends declared (in dollars per share)         $ 0.59 $ 0.54   $ 1.18 $ 1.06  
Payment of dividends               $ 192,902 $ 173,842  
Dividends payable         $ 7,590 $ 12,763   7,590 12,763  
Restricted stock unit, Performance-based and Service-based                    
Dividends Payable                    
Dividends payable         7,600     7,600    
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         4,800     4,800   $ 4,800
Regular cash dividend | Additional paid-in capital                    
Dividends Payable                    
Payment of dividends         92,600 $ 84,500   186,700 166,100  
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 2,800   $ 9,000
Cash dividends paid               $ 6,200 $ 7,700