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Quarterly Financial Information | 12 Months Ended
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Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract] |
Quarterly Financial Information | Quarterly Financial Information
|  | First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter 1
(unaudited, $ in thousands, except per share data) |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017
Net premiums earned |  | $ | 591,828 |  |  | 560,854 |  |  | 604,836 |  |  | 568,030 |  |  | 614,277 |  |  | 572,055 |  |  | 625,288 |  |  | 590,088 |
Net investment income earned |  | 43,231 |  |  | 37,419 |  |  | 45,553 |  |  | 41,430 |  |  | 52,443 |  |  | 40,446 |  |  | 54,109 |  |  | 42,587 |
Net realized and unrealized (losses) gains 2 |  | (10,549 | ) |  | (1,045 | ) |  | (1,652 | ) |  | 1,734 |  |  | (4,787 | ) |  | 6,798 |  |  | (37,935 | ) |  | (1,128 | )
Other income |  | 2,179 |  |  | 3,241 |  |  | 3,179 |  |  | 3,291 |  |  | 2,538 |  |  | 1,994 |  |  | 1,542 |  |  | 2,190 |
Total revenues |  | 626,689 |  |  | 600,469 |  |  | 651,916 |  |  | 614,485 |  |  | 664,471 |  |  | 621,293 |  |  | 643,004 |  |  | 633,737 |
Income before federal income taxes |  | 19,931 |  |  | 67,574 |  |  | 72,525 |  |  | 58,929 |  |  | 67,130 |  |  | 67,315 |  |  | 52,135 |  |  | 68,150 |
Net income |  | 18,925 |  |  | 50,440 |  |  | 58,819 |  |  | 41,426 |  |  | 55,435 |  |  | 46,718 |  |  | 45,760 |  |  | 30,242 |
Net income per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | 0.32 |  |  | 0.87 |  |  | 1.00 |  |  | 0.71 |  |  | 0.94 |  |  | 0.80 |  |  | 0.77 |  |  | 0.52 |
Diluted |  | 0.32 |  |  | 0.85 |  |  | 0.99 |  |  | 0.70 |  |  | 0.93 |  |  | 0.79 |  |  | 0.76 |  |  | 0.51 |
1 Results for the fourth quarter of 2017 include the impact of the $20.2 million write off of deferred tax assets required with the implementation of Tax Reform. See Note 13. "Federal Income Taxes" above for additional information. 2 Effective January 1, 2018, changes in unrealized gains and losses on our equity portfolio are recognized in income through "Net unrealized losses on equity securities" on our Consolidated Statements of Income, as a result of our adoption of ASU 2016-01. See Note 3. "Adoption of Accounting Pronouncements" above. The addition of all quarters may not agree to annual amounts on the Financial Statements due to rounding.

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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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