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Supplemental Information (Details 6) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Unrealized (gains) losses on available-for-sale securities that were reclassified from net income |  |  |  |
Investment income (loss) | $ 14,821 | $ 5,368 | $ 94,242 | $ 25,620
Interest expense | 60,271 | 63,459 | 120,279 | 126,113
General and administrative expenses | 132,612 | 133,612 | 265,157 | 269,958
Income (loss) from continuing operations before income taxes | 36,181 | (134,095) | 145,375 | 78,317
Tax expense (benefit) | 6,172 | (36,192) | 17,444 | 32,852
Net income (loss) attributable to Nabors | (4,361) | (72,789) | 94,760 | 61,301
Unrealized gains (losses) on available-for-sale securities | Reclassification adjustment for (gains)/losses included in net income (loss) |  |  |  |
Unrealized (gains) losses on available-for-sale securities that were reclassified from net income |  |  |  |
Investment income (loss) | 12,183 | 19 | 88,157 | 12,484
Interest expense | 153 | 191 | 306 | 382
General and administrative expenses | 281 | 260 | 562 | 520
Income (loss) from continuing operations before income taxes | 11,749 | (432) | 87,289 | 11,582
Tax expense (benefit) | 2,082 | (165) | 2,366 | 3,584
Net income (loss) attributable to Nabors | $ 9,667 | $ (267) | $ 84,923 | $ 7,998

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