Annual report pursuant to Section 13 and 15(d)

Earnings Per Share (Details)

v2.4.0.6
Earnings Per Share (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2010
Earnings Per Share [Abstract]                      
Net income (loss) attributable to Magellan Petroleum Corporation $ 34,705 $ (4,590) $ (4,557) $ 940 $ (26,873) $ (84) $ (2,099) $ (3,376) $ 26,498 $ (32,432) $ (1,446)
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]                      
Basic weighted-average shares outstanding (in shares)                 53,592,958 52,398,936 51,410,596
Add: dilutive effects of stock options and unvested stock grants                 448,269 [1] 0 [1] 0 [1]
Diluted weighted-average common shares outstanding (in shares)                 54,041,227 52,398,936 51,410,596
Basic net loss per common share (dollars per share) $ 0.64 $ (0.09) $ (0.08) $ 0.02 $ (0.51)   $ (0.04) $ (0.06) $ 0.49 $ (0.62) $ (0.03)
Diluted net loss per common share (dollars per share) $ 0.64 $ (0.09) $ (0.08) $ 0.02 $ (0.51)   $ (0.04) $ (0.06) $ 0.49 $ (0.62) $ (0.03)
[1] There is no dilutive effect on earnings per share in periods with net losses.