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. 04, 2018
Nov. 07, 2018
Nov. 19, 2014
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2014
Dec. 31, 2018
Dec. 31, 2017
Jun. 30, 2018
Dividends Payable                  
Payment of dividends             $ 237,319 $ 192,902  
Dividends payable       $ 5,404 $ 7,590   5,404 7,590  
Regular cash dividend                  
Dividends Payable                  
Cash dividends declared (in dollars per share)   $ 0.75              
Cash dividends paid per share (in dollars per share) $ 0.75                
Regular cash dividend | Restricted stock unit, Performance-based and Service-based                  
Dividends Payable                  
Dividends payable       5,400     5,400   $ 6,700
Regular cash dividend | Additional paid-in capital                  
Dividends Payable                  
Payment of dividends       $ 114,500 $ 92,600   234,400 186,700  
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      
Special cash dividend | Restricted stock unit, Performance-based and Service-based                  
Dividends Payable                  
Dividends payable           $ 43,000      
Cash dividends paid             $ 2,900 $ 6,200