CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parentheticals) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement Of Stockholders' Equity [Abstract]
Issuance of common stock to non-employee directors, shares	4,734	4,737	6,840
Exercise of stock options, shares	102,314	153,775	468,204
Repurchase of common stock, shares			1,184,200
Dividends paid, per share (in dollars per share)	$ 0.56	$ 0.52	$ 0.48