Consolidated Statements of Changes in Stockholders Equity (Unaudited) (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Common stock
Common stock transactions:
Common shares purchased and retired	124,867	25,677
Common shares issued	0	0
Non-vested common shares issued	147,876	108,873
Non-vested common shares forfeited	3,782	1,815
Stock options exercised	215,805	243,238
Shares tendered in payment of option price and income tax withholding amounts	152,131	87,933
Retained earnings
Cash dividends declared:
Common (in dollars per share)	$ 0.16	$ 0.0000