Condensed Consolidated Statements of Income Parenthetical (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Stock Dividend					2.50%
Average common shares outstanding	15,842	[1]	15,967	[1]	15,890	[1]	15,987	[1]
Cash dividends declared	$ 4,756		$ 4,676		$ 9,548		$ 9,376
Scenario, Previously Reported [Member]
Average common shares outstanding			15,578				15,597

[1] (A)Adjusted for the declaration of a two and a half percent (2.5%) stock dividend in 2013, shares related to which were issued in February 2014. Prior to the adjustment, the average common shares outstanding were 15,578 and 15,597 for the three and six months ended June 30, 2013, respectively.