CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Stockholders' Equity [Abstract]
Issuance of common shares per stock based compensation awards, including related tax effects, shares	169,942	184,220	154,921
Common stock acquired for treasury, shares	90,058	154,637	113,709
Common stock dividend (in dollars per share)	$ 0.68	$ 0.66	$ 0.64