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Basic and Diluted Earnings Per Share (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Summary of basic and diluted common shares outstanding
Weighted average number of basic common shares outstanding	6,995,000	10,196,000	8,435,000	10,198,000
Assumed exercise of stock options, net of shares assumed repurchased at average market price during the period using proceeds received upon exercise of options	83,010	48,725	76,313	47,805
Weighted average number of diluted common shares outstanding	7,078,000	10,245,000	8,511,000	10,246,000

X

- Definition

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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