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Reclassifications Out of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Other net realized investment gains (losses) | $ 8,430 | $ 39,918 | $ 5,800 | $ 39,130
Other than temporary impairment losses on investments | (1,898) | (37) | (2,238) | (62)
Income before income taxes | 9,772 | 44,798 | 13,010 | 51,772
Income tax expense (benefit) | 1,345 | (11,590) | 4,901 | (9,741)
Net income | 11,117 | 33,208 | 17,911 | 42,031
Reclassification out of Accumulated Other Comprehensive Income |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Net income | (917) | (29,756) | (2,716) | (33,788)
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains and Losses on Available for Sale Securities |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Other net realized investment gains (losses) | (3,745) | (45,840) | (7,126) | (51,374)
Other than temporary impairment losses on investments | 1,897 | 37 | 2,238 | 62
Income before income taxes | (1,848) | (45,803) | (4,888) | (51,312)
Income tax expense (benefit) | 688 | 16,109 | 1,846 | 17,599
Net income | (1,160) | (29,694) | (3,042) | (33,713)
Reclassification out of Accumulated Other Comprehensive Income | Foreign Currency Items |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Other net realized investment gains (losses) | 373 | (96) | 501 | (116)
Income tax expense (benefit) | (130) | 34 | (175) | 41
Net income | $ 243 | $ (62) | $ 326 | $ (75)

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