Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2012

Earnings Per Share [Abstract]

Weighted Average Number of Shares Used in Computing Earnings Per Share

The following table shows the weighted average number of shares used in computing earnings per share and the effect on weighted average number of shares of dilutive potential common stock.

	2012				2011				2010
	Shares		Per Share Amount		Shares		Per Share Amount		Shares		Per Share Amount
Basic earnings per share		3,691,517	$	0.56		3,666,206	$	1.12		3,627,016	$	1.01
Effect of dilutive securities, stock-based awards		15,577				17,955				16,093
Diluted earnings per share		3,707,094	$	0.55		3,684,161	$	1.12		3,643,109	$	1.01