Dividends - Cash Dividends per Common Share (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Equity [Abstract]
Cash dividends per common share (in dollars per share)	$ 0.17	$ 0.17	$ 0.52	$ 0.50