Consolidated Statements of Equity (Parenthetical) (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Stock option exercises and other shares issued to employees and directors, shares	127	133
Income tax on stock option exercise and other shares issued to employees and directors	$ 419	$ 531
Dividends declared, per common share	$ 0.15	$ 0.11
Additional Paid-in Capital
Stock option exercises and other shares issued to employees and directors, shares	127	133
Income tax on stock option exercise and other shares issued to employees and directors	419	531
Treasury Shares
Stock option exercises and other shares issued to employees and directors, shares	127	133
Income tax on stock option exercise and other shares issued to employees and directors	$ 419	$ 531
Retained Earnings
Dividends declared, per common share		$ 0.11