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Shareholders' Equity - Dividends (Details) - $ / shares
Nov. 02, 2016
Jun. 15, 2016
May 03, 2016
Dec. 15, 2015
Oct. 29, 2015
Jun. 15, 2015
Apr. 28, 2015
Dividends [Abstract]              
Dividends declared (in dollars per share)     $ 0.86   $ 0.80   $ 0.80
Dividends paid (in dollars per share)   $ 0.86   $ 0.80   $ 0.80  
Subsequent Event              
Dividends [Abstract]              
Dividends declared (in dollars per share) $ 0.86