Consolidated Statements of Changes in Stockholders Equity (Unaudited) (Parenthetical) (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Common stock
Common stock transactions:
Common shares purchased and retired	349,930	25,677
Common shares issued	24,581	26,096
Non-vested common shares issued	147,876	108,873
Non-vested common shares forfeited	8,647	10,138
Stock options exercised	286,069	446,404
Shares tendered in payment of option price and income tax withholding amounts	160,377	150,290
Retained earnings
Cash dividends declared:
Common (in dollars per share)	$ 0.32	$ 0.1300