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Acquisitions (Schedule of Pro Forma Results) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
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Feb. 28, 2014
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Feb. 28, 2013
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Feb. 28, 2014
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Feb. 28, 2013
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| Acquisitions [Abstract] | ||||
| Oil and Gas Revenues | $ 23,028 | $ 13,043 | $ 44,659 | $ 24,004 |
| Net income | $ 5,161 | $ 3,573 | $ 12,091 | $ 6,820 |
| Earnings per common share | ||||
| Basic | $ 0.07 | $ 0.06 | $ 0.16 | $ 0.13 |
| Diluted | $ 0.07 | $ 0.06 | $ 0.16 | $ 0.12 |