Annual report pursuant to Section 13 and 15(d)

Shareholders' Equity - Declared Quarterly Cash Dividends on Common Stock (Details)

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Shareholders' Equity - Declared Quarterly Cash Dividends on Common Stock (Details) - $ / shares
Jan. 21, 2016
Oct. 22, 2015
Jul. 23, 2015
Apr. 16, 2015
Feb. 10, 2015
Class of Stock [Line Items]          
Common dividends (in dollars per share)   $ 0.05 $ 0.05 $ 0.05 $ 0.05
Subsequent Event          
Class of Stock [Line Items]          
Common dividends (in dollars per share) $ 0.05