Condensed Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Cash dividends declared, per share (in dollars per share)	$ 0.82	$ 0.74
Preferred Stock
Cash dividends declared, per share	$ 16.50	$ 20.83
Annual dividend rate (as a percent)	(9.00%)	5.00%