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 6 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Earnings Per Share [Abstract]        
Net income (loss) attributable to Magellan Petroleum Corporation $ (7,285) $ (4,557) $ (12,594) $ (3,617)
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]        
Basic weighted-average shares outstanding (in shares) 53,860,337 53,835,594 53,854,759 53,378,216
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) 53,860,337 53,835,594 53,854,759 53,378,216
Basic net loss per common share (dollars per share) $ (0.14) $ (0.08) $ (0.23) $ (0.07)
[1] There is no dilutive effect on earnings per share in periods with net losses.