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Shareholders' Equity (Details) - $ / shares
3 Months Ended
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Shareholders' Equity            
Dividend declared (in dollars per share) $ 0.375 $ 0.375 $ 0.375 $ 0.30 $ 0.30 $ 0.30
Common Stock, Dividends, Per Share, Cash Paid $ 0.375 0.375   $ 0.30 0.30  
Common Stock, Dividend Declared Prior Quarter Paid Current Quarter   $ 0.375     $ 0.30