Condensed Consolidated Statements of Income Parenthetical (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Stock Dividend					20.00%
Average common shares outstanding	15,578	[1]	15,625	[1]	15,597	[1]	15,616	[1]
Cash dividends declared	$ 4,676		$ 3,912		$ 9,376		$ 7,833
Scenario, Previously Reported [Member]
Average common shares outstanding			13,021				13,013

[1] (A)Adjusted for the declaration of a twenty percent (20%) stock dividend in 2012, shares related to which were issued in February 2013. Prior to the adjustment, the average common shares outstanding were 13,021 and 13,013 for the three and six months ended June 30, 2012, respectively.