Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share (Details)

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Earnings Per Share (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2013
Mar. 31, 2012
Earnings Per Share [Abstract]        
Net income (loss) attributable to Magellan Petroleum Corporation $ (4,332) $ (4,590) $ (16,928) $ (8,207)
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]        
Basic weighted-average shares outstanding (in shares) 46,084,149 53,835,594 51,302,369 53,592,958
Add: dilutive effects of stock options and unvested stock grants 0 [1] 0 [1] 0 [1] 0 [1]
Diluted weighted-average common shares outstanding (in shares) 46,084,149 53,835,594 51,302,369 53,592,958
Basic net loss per common share (dollars per share) $ (0.09) $ (0.09) $ (0.33) $ (0.15)
[1] There is no dilutive effect on earnings per share in periods with net losses.