Condensed Consolidated Statements of Income Parenthetical (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Stock Dividend					20.00%
Average common shares outstanding	15,507	[1]	15,568	[1]	15,565	[1]	15,595	[1]
Cash dividends declared	$ 4,665		$ 3,896		$ 14,041		$ 11,729
Scenario, Previously Reported [Member]
Average common shares outstanding			12,973				12,996

[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 12,973 and 12,996 for the three and nine months ended September 30, 2012, respectively.