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v3.8.0.1

Consolidated Statements of Income - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Revenues: |  |  |
Net premiums earned | $ 2,291,027 | $ 2,149,572 | $ 1,989,909
Net investment income earned | 161,882 | 130,754 | 121,316
Net realized gains (losses): |  |  |
Net realized investment gains | 11,204 | 3,562 | 31,537
Other-than-temporary impairments | (4,809) | (8,509) | (18,366)
Other-than-temporary impairments on fixed income securities recognized in other comprehensive income | (36) | 10 | 0
Total net realized gains (losses) | 6,359 | (4,937) | 13,171
Other income | 10,716 | 8,881 | 7,456
Total revenues | 2,469,984 | 2,284,270 | 2,131,852
Expenses: |  |  |
Loss and loss expense incurred | 1,345,074 | 1,234,797 | 1,148,541
Amortization of deferred policy acquisition costs | 469,236 | 450,328 | 399,436
Other insurance expenses | 333,097 | 321,395 | 300,359
Interest expense | 24,354 | 22,771 | 22,428
Corporate expenses | 36,255 | 35,024 | 28,396
Total expenses | 2,208,016 | 2,064,315 | 1,899,160
Income before federal income tax | 261,968 | 219,955 | 232,692
Federal income tax expense: |  |  |
Current | 62,184 | 48,581 | 45,347
Deferred | 30,958 | 12,879 | 21,484
Total federal income tax expense | 93,142 | 61,460 | 66,831
Net income | $ 168,826 | $ 158,495 | $ 165,861
Earnings per share: |  |  |
Basic net income | $ 2.89 | $ 2.74 | $ 2.90
Diluted net income | 2.84 | 2.70 | 2.85
Dividends to stockholders | $ 0.66 | $ 0.61 | $ 0.57

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration