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Condensed Consolidating Financial Information - Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Condensed Consolidating Statements of Comprehensive Income (Loss) |  |  |  |
Net income (loss) attributable to Nabors | $ (148,532) | $ (111,211) | $ (430,467) | $ (694,155)
Translation adjustment attributable to Nabors |  |  |  |
Translation adjustment attributable to Nabors | 16,444 | (8,950) | 31,183 | 27,870
Unrealized gains (losses) on marketable securities: |  |  |  |
Unrealized gains (losses) on marketable securities | (5,706) | 1,502 | (5,122) | 3,551
Less: reclassification adjustment for (gains) losses included in net income (loss) |  | 3,495 | 1,341 | 3,495
Unrealized gains (losses) on marketable securities | (5,706) | 4,997 | (3,781) | 7,046
Pension liability amortization and adjustment | 50 | 297 | 150 | 765
Unrealized gains (losses) and amortization on cash flow hedges | 153 | 153 | 459 | 459
Other comprehensive income (loss), before tax | 10,941 | (3,503) | 28,011 | 36,140
Income tax expense (benefit) related to items of other comprehensive income (loss) | 78 | 172 | 235 | 472
Other comprehensive income (loss), net of tax | 10,863 | (3,675) | 27,776 | 35,668
Comprehensive income (loss) attributable to Nabors | (137,669) | (114,886) | (402,691) | (658,487)
Net income (loss) attributable to noncontrolling interest | 2,113 | 1,185 | 5,001 | (990)
Translation adjustment attributable to noncontrolling interest | 160 | (90) | 317 | 371
Comprehensive income (loss) attributable to noncontrolling interest | 2,273 | 1,095 | 5,318 | (619)
Comprehensive income (loss) | (135,396) | (113,791) | (397,373) | (659,106)
Reportable Legal Entities | Parent Company |  |  |  |
Condensed Consolidating Statements of Comprehensive Income (Loss) |  |  |  |
Net income (loss) attributable to Nabors | (148,532) | (111,211) | (430,467) | (694,155)
Translation adjustment attributable to Nabors |  |  |  |
Translation adjustment attributable to Nabors | 16,444 | (8,950) | 31,183 | 27,870
Unrealized gains (losses) on marketable securities: |  |  |  |
Unrealized gains (losses) on marketable securities | (5,706) | 1,502 | (5,122) | 3,551
Less: reclassification adjustment for (gains) losses included in net income (loss) |  | 3,495 | 1,341 | 3,495
Unrealized gains (losses) on marketable securities | (5,706) | 4,997 | (3,781) | 7,046
Pension liability amortization and adjustment | 50 | 297 | 150 | 765
Unrealized gains (losses) and amortization on cash flow hedges | 153 | 153 | 459 | 459
Other comprehensive income (loss), before tax | 10,941 | (3,503) | 28,011 | 36,140
Income tax expense (benefit) related to items of other comprehensive income (loss) | 78 | 172 | 235 | 472
Other comprehensive income (loss), net of tax | 10,863 | (3,675) | 27,776 | 35,668
Comprehensive income (loss) attributable to Nabors | (137,669) | (114,886) | (402,691) | (658,487)
Comprehensive income (loss) | (137,669) | (114,886) | (402,691) | (658,487)
Reportable Legal Entities | Guarantor Subsidiaries |  |  |  |
Condensed Consolidating Statements of Comprehensive Income (Loss) |  |  |  |
Net income (loss) attributable to Nabors | (66,846) | (77,423) | (223,862) | (264,583)
Translation adjustment attributable to Nabors |  |  |  |
Translation adjustment attributable to Nabors |  | 12 |  | (39)
Unrealized gains (losses) on marketable securities: |  |  |  |
Pension liability amortization and adjustment | 50 | 297 | 150 | 765
Unrealized gains (losses) and amortization on cash flow hedges | 153 | 153 | 459 | 459
Other comprehensive income (loss), before tax | 203 | 462 | 609 | 1,185
Income tax expense (benefit) related to items of other comprehensive income (loss) | 78 | 172 | 235 | 472
Other comprehensive income (loss), net of tax | 125 | 290 | 374 | 713
Comprehensive income (loss) attributable to Nabors | (66,721) | (77,133) | (223,488) | (263,870)
Comprehensive income (loss) | (66,721) | (77,133) | (223,488) | (263,870)
Reportable Legal Entities | Other Subsidiaries (Non-Guarantors) |  |  |  |
Condensed Consolidating Statements of Comprehensive Income (Loss) |  |  |  |
Net income (loss) attributable to Nabors | (172,942) | (149,775) | (513,427) | (844,844)
Translation adjustment attributable to Nabors |  |  |  |
Translation adjustment attributable to Nabors | 16,444 | (8,938) | 31,183 | 27,870
Unrealized gains (losses) on marketable securities: |  |  |  |
Unrealized gains (losses) on marketable securities | (5,706) | 2,782 | (5,122) | 3,551
Less: reclassification adjustment for (gains) losses included in net income (loss) |  | 3,495 | 1,341 | 3,495
Unrealized gains (losses) on marketable securities | (5,706) | 6,277 | (3,781) | 7,046
Pension liability amortization and adjustment | 100 | 594 | 300 | 1,530
Unrealized gains (losses) and amortization on cash flow hedges | 153 | 153 | 459 | 459
Other comprehensive income (loss), before tax | 10,991 | (1,914) | 28,161 | 36,905
Income tax expense (benefit) related to items of other comprehensive income (loss) | 156 | 284 | 470 | 765
Other comprehensive income (loss), net of tax | 10,835 | (2,198) | 27,691 | 36,140
Comprehensive income (loss) attributable to Nabors | (162,107) | (151,973) | (485,736) | (808,704)
Net income (loss) attributable to noncontrolling interest | 2,113 | 1,185 | 5,001 | (990)
Translation adjustment attributable to noncontrolling interest | 160 | (90) | 317 | 371
Comprehensive income (loss) attributable to noncontrolling interest | 2,273 | 1,095 | 5,318 | (619)
Comprehensive income (loss) | (159,834) | (150,878) | (480,418) | (809,323)
Consolidating Adjustments |  |  |  |
Condensed Consolidating Statements of Comprehensive Income (Loss) |  |  |  |
Net income (loss) attributable to Nabors | 239,788 | 227,198 | 737,289 | 1,109,427
Translation adjustment attributable to Nabors |  |  |  |
Translation adjustment attributable to Nabors | (16,444) | 8,926 | (31,183) | (27,831)
Unrealized gains (losses) on marketable securities: |  |  |  |
Unrealized gains (losses) on marketable securities | 5,706 | (2,782) | 5,122 | (3,551)
Less: reclassification adjustment for (gains) losses included in net income (loss) |  | (3,495) | (1,341) | (3,495)
Unrealized gains (losses) on marketable securities | 5,706 | (6,277) | 3,781 | (7,046)
Pension liability amortization and adjustment | (150) | (891) | (450) | (2,295)
Unrealized gains (losses) and amortization on cash flow hedges | (306) | (306) | (918) | (918)
Other comprehensive income (loss), before tax | (11,194) | 1,452 | (28,770) | (38,090)
Income tax expense (benefit) related to items of other comprehensive income (loss) | (234) | (456) | (705) | (1,237)
Other comprehensive income (loss), net of tax | (10,960) | 1,908 | (28,065) | (36,853)
Comprehensive income (loss) attributable to Nabors | 228,828 | 229,106 | 709,224 | 1,072,574
Comprehensive income (loss) | $ 228,828 | $ 229,106 | $ 709,224 | $ 1,072,574

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