Condensed Consolidated Statements of Equity (Parenthetical) (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Additional Paid-in Capital
Income tax on stock option exercise and other shares issued to employees and directors	$ 1,099	$ 675
Stock option exercises and other shares issued to employees and directors, shares	85	140
Retained Earnings
Dividends declared, per common share	$ 0.32	$ 0.30