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Investments (Net Investment Income) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Net Investment Income |  |  |
Investment fees and expenses | $ (6,107) | $ (7,994) | $ (6,798)
Net investment income | 108,660 | 125,557 | 129,265
Debt Securities [Member] |  |  |
Net Investment Income |  |  |
Interest and dividend income | 97,348 | 111,895 | 122,065
Equities [Member] |  |  |
Net Investment Income |  |  |
Interest and dividend income | 13,317 | 10,817 | 9,454
Short-term Investments and Other Invested [Member] |  |  |
Net Investment Income |  |  |
Interest and dividend income | 2,049 | 8,833 | 2,584
Business owned life insurance [Member] |  |  |
Net Investment Income |  |  |
Interest and dividend income | $ 2,053 | $ 2,006 | $ 1,960

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- Definition Represents the total of interest and dividend income, including any amortization and accretion (as applicable) of discounts and premiums, earned from (1) loans and leases whether held-for-sale or held-in-portfolio; (2) investment securities; (3) federal funds sold; (4) securities purchased under agreements to resell; (5) investments in banker's acceptances, commercial paper, or certificates of deposit; (6) dividend income; or (7) other investments not otherwise specified herein. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.1-5) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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- Definition Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.2) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 16 -Article 12 + Details
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