Condensed Consolidated Statements of Income Parenthetical (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
Stock Dividend			10.00%
Average common shares outstanding	13,012	[1]	12,896	[1]
Cash dividends declared	$ 3,921		$ 3,528
Scenario, Previously Reported [Member]
Average common shares outstanding			11,724

[1] (A)Adjusted for the declaration of a ten percent (10%) stock dividend in 2011, shares related to which were issued in February 2012. Prior to the adjustment, the average common shares outstanding were 11,724 for the three months ended March 31, 2011.