Condensed Consolidated Statements of Shareholders' Equity (Parenthetical) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash dividends paid on common shares, per share	$ 0.1575	$ 0.1575
Issuance under equity compensation plans, shares	87,743	189,848
Trust preferred securities conversion	1,176,470	0