Condensed Consolidated Statements of Shareholders' Equity (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash dividends paid on common shares, per share	$ 0.21	$ 0.21	$ 0.21
Issuance under equity compensation plans, shares	135,087	238,290	140,561
Stock Issued During Period, Shares, Conversion of Convertible Securities	1,176,470	0	0
Issuance under public stock offering, shares	0	0	2,743,900