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Investments in Unconsolidated Affiliates (Details) - USD ($)
$ in Thousands, shares in Millions
12 Months Ended
Mar. 24, 2015
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Investments in Unconsolidated Affiliates        
Nabors' share of equity method earnings (losses)   $ 1 $ 7 $ (221,914)
Other-than-temporary impairment       219,737
Summarized income statement (loss) information for investment in unconsolidated affiliates        
Nabors' share of equity method earnings (losses)   $ 1 $ 7 (221,914)
C&J Energy Services, Ltd.        
Investments in Unconsolidated Affiliates        
Cash consideration in merger $ 693,500      
Cash proceeds from merger after working capital requirements $ 650,000      
Common shares held in merged entity 62.5      
Percentage of outstanding and issued common shares held 53.00%      
Other-than-temporary impairment       192,400
CJES        
Investments in Unconsolidated Affiliates        
Net income (loss)       221,900
Other-than-temporary impairment       192,400
Summarized income statement (loss) information for investment in unconsolidated affiliates        
Net income (loss)       $ 221,900