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Consolidated Statements of Stockholders' Equity (Parenthetical) (USD $)	6 Months Ended
	Jun. 30, 2012
Unrealized loss on available for sale marketable securities, taxes	$ 99,000
Stock tendered during period shares for redemption of stock options, shares	13,000
Treasury shares issued for Deferred Compensation Plan funding and redemptions, shares	10,000
Cash dividends per common share	$ 0.32
Shares issued pursuant to Dividend Reinvestment Plan, shares	1,000

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Aggregate dividends paid during the period for each share of common stock outstanding.

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Number of shares issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the shareholders to reinvest dividends paid to them by the entity on new issues of stock by the entity.

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