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Shareholders' Equity Cash Dividends Declared Per Common Share (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Disclosure of Cash Dividends Declared and Paid Per Common Share [Abstract]        
Cash dividends declared and paid per common share $ 0.48 $ 0.42 $ 0.96 $ 0.84