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Unaudited Quarterly Financial Information (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Unaudited Quarterly Financial Information                      
Operating revenues and Earnings (losses) from unconsolidated affiliates from continuing operations $ 1,596,807 $ 1,666,892 $ 1,602,797 $ 1,821,757 $ 1,731,979 $ 1,642,227 $ 1,352,950 $ 1,389,842 $ 6,688,253 $ 6,116,998 $ 4,167,750
Income (loss) from continuing operations, net of tax 129,272 65,818 (98,653) 142,618 89,535 87,190 70,887 94,552 239,055 342,164 255,870
Income (loss) from discontinued operations, net of tax (101,121) 10,826 24,690 (8,795) (193,985) (12,226) 121,167 (12,396) (74,400) (97,440) (161,090)
Less: Net (income) loss attributable to noncontrolling interest (1,074) (988) 1,174 267 (1,400) (708) 394 669 (621) (1,045) (85)
Net income (loss) attributable to Nabors 27,077 75,656 (72,789) 134,090 (105,850) 74,256 192,448 82,825 164,034 243,679 94,695
Earnings per share                      
Basic from continuing operations (in dollars per share) $ 0.44 $ 0.22 $ (0.34) $ 0.50 $ 0.31 $ 0.30 $ 0.25 $ 0.33 $ 0.82 $ 1.19 $ 0.90
Basic from discontinued operations (in dollars per share) $ (0.35) $ 0.04 $ 0.09 $ (0.04) $ (0.68) $ (0.04) $ 0.42 $ (0.04) $ (0.25) $ (0.34) $ (0.57)
Total Basic (in dollars per share) $ 0.09 $ 0.26 $ (0.25) $ 0.46 $ (0.37) $ 0.26 $ 0.67 $ 0.29 $ 0.57 $ 0.85 $ 0.33
Diluted from continuing operations (in dollars per share) $ 0.44 $ 0.22 $ (0.34) $ 0.49 $ 0.30 $ 0.30 $ 0.24 $ 0.33 $ 0.82 $ 1.17 $ 0.88
Diluted from discontinued operations (in dollars per share) $ (0.35) $ 0.04 $ 0.09 $ (0.03) $ (0.66) $ (0.05) $ 0.41 $ (0.05) $ (0.26) $ (0.34) $ (0.55)
Total Diluted (in dollars per share) $ 0.09 $ 0.26 $ (0.25) $ 0.46 $ (0.36) $ 0.25 $ 0.65 $ 0.28 $ 0.56 $ 0.83 $ 0.33
Additional disclosure                      
Earnings (losses) from unconsolidated affiliates $ 1,200 $ (99,500) $ (134,300) $ (68,700) $ (2,700) $ 33,700 $ 9,300 $ 16,300 $ (301,320) $ 56,647 $ 33,267