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Differences in Tax Provision for Financial Statement Purposes and Expected Tax Provision at Weighted Average Tax Rate (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Income Tax [Line Items] |  |  |  |
Expected tax provision at weighted average, Amount | $ (5,580) | $ (1,614) | $ (9,595) | $ 6,649
Adjustments: |  |  |  |
Tax exempt interest, Amount | (107) | (120) | (326) | (490)
Dividend exclusion, Amount | (175) | (229) | (588) | (1,186)
Effective tax rate adjustment, Amount |  | 288 |  | 2,600
Other, Amount | (119) | 42 | (373) | 535
Actual tax on continuing operations | $ (5,981) | $ (1,633) | $ (10,882) | $ 8,108
Expected tax provision at weighted average rate, % of Pre-Tax Income | (57.40%) | (19.90%) | (292.30%) | 11.10%
Adjustments: |  |  |  |
Tax exempt interest, % of Pre-Tax Income | (1.10%) | (1.50%) | (9.90%) | (0.80%)
Dividend exclusion, % of Pre-Tax Income | (1.80%) | (2.80%) | (17.90%) | (2.00%)
Effective tax rate adjustment, % of Pre-Tax Income | 0.00% | 3.50% | 0.00% | 4.30%
Other, % of Pre-Tax Income | (1.20%) | 0.60% | (11.40%) | 0.90%
Actual tax on continuing operations, % of Pre-Tax Income | (61.50%) | (20.10%) | (331.50%) | 13.50%

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