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Federal Income Taxes | 6 Months Ended
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Jun. 30, 2018
Income Tax Disclosure [Abstract] |
Income Tax Disclosure | Federal Income Taxes (a) On December 22, 2017, Tax Reform was signed into law, which among other implications, reduced our statutory corporate tax rate from 35% to 21% beginning with our 2018 tax year. We continue to provide provisional amounts for loss reserve discounting because the Internal Revenue Service ("IRS") has not yet issued guidance with regard to the discount rates to be used under Tax Reform. For additional information, refer to Note 13. "Federal Income Taxes" in Item 8. "Financial Statements and Supplementary Data." of our 2017 Annual Report. During 2018, we will continue to monitor IRS guidance to complete the analysis of loss reserve discounting. (b) A reconciliation of federal income tax on income at the corporate rate to the effective tax rate is as follows:
|  | Quarter ended June 30, |  | Six Months ended June 30,
($ in thousands) |  | 2018 |  | 2017 |  | 2018 |  | 2017
Statutory tax rate |  | 21 | % |  | 35 |  |  | 21 |  |  | 35 |
Tax at statutory rate |  | $ | 15,231 |  |  | 20,625 |  |  | 19,416 |  |  | 44,276 |
Tax-advantaged interest |  | (1,393 | ) |  | (2,757 | ) |  | (2,904 | ) |  | (5,564 | )
Dividends received deduction |  | (210 | ) |  | (625 | ) |  | (336 | ) |  | (956 | )
Stock-based compensation |  | (82 | ) |  | (374 | ) |  | (2,548 | ) |  | (3,323 | )
Other |  | 160 |  |  | 634 |  |  | 1,084 |  |  | 204 |
Federal income tax expense |  | $ | 13,706 |  |  | 17,503 |  |  | 14,712 |  |  | 34,637 |

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI http://asc.fasb.org/topic&trid=2144680 + Details
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