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Schedule I - Summary of Investments - Other Than Investments in Related Parties | 12 Months Ended
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Dec. 31, 2018
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Abstract] |
Schedule I - Summary of Investments- Other than Investments in Related Parties |
Types of investment |  |  |  |  |  |
($ in thousands) |  | Amortized Cost or Cost |  | Fair Value |  | Carrying Amount
Fixed income securities: |  |  |  |  |  |  |  |  |
Held-to-maturity: |  |  |  |  |  |  |  |  |
Obligations of states and political subdivisions |  | $ | 17,431 |  |  | 17,969 |  |  | 17,470 |
Public utilities |  | 4,707 |  |  | 5,264 |  |  | 4,818 |
All other corporate securities |  | 14,883 |  |  | 15,084 |  |  | 14,822 |
Total fixed income securities, held-to-maturity |  | 37,021 |  |  | 38,317 |  |  | 37,110 |
Available-for-sale: |  |  |  |  |  |  |  |  |
U.S. government and government agencies |  | 120,092 |  |  | 121,310 |  |  | 121,310 |
Foreign government |  | 23,202 |  |  | 23,131 |  |  | 23,131 |
Obligations of states and political subdivisions |  | 1,121,615 |  |  | 1,138,469 |  |  | 1,138,469 |
Public utilities |  | 28,464 |  |  | 28,393 |  |  | 28,393 |
All other corporate securities |  | 1,611,388 |  |  | 1,589,015 |  |  | 1,589,015 |
Collateralized loan obligation securities and other asset-backed securities |  | 720,193 |  |  | 717,362 |  |  | 717,362 |
Commercial mortgage-backed securities |  | 527,409 |  |  | 527,078 |  |  | 527,078 |
Residential mortgage-backed securities |  | 1,118,435 |  |  | 1,128,342 |  |  | 1,128,342 |
Total fixed income securities, available-for-sale |  | 5,270,798 |  |  | 5,273,100 |  |  | 5,273,100 |
Equity securities: |  |  |  |  |  |  |  |  |
Common stock: |  |  |  |  |  |  |  |  |
Public utilities |  | 2,416 |  |  | 2,732 |  |  | 2,732 |
Banks, trusts and insurance companies |  | 7,448 |  |  | 8,331 |  |  | 8,331 |
Industrial, miscellaneous and all other |  | 125,361 |  |  | 133,664 |  |  | 133,664 |
Nonredeemable preferred stock |  | 2,889 |  |  | 2,912 |  |  | 2,912 |
Total equity securities |  | 138,114 |  |  | 147,639 |  |  | 147,639 |
Short-term investments |  | 323,864 |  |  | 323,864 |  |  | 323,864 |
Other investments |  | 178,938 |  |  |  |  |  | 178,938 |
Total investments |  | $ | 5,948,735 |  |  |  |  |  | 5,960,651 |
See accompanying Report of Independent Registered Public Accounting Firm in Item 8. "Financial Statements and Supplementary Data." of this Form 10-K.

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- Definition The entire disclosure of information about investment held by insurance company, excluding investment in related party. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 15 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 7 -Subparagraph (SX 210.12-15) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611379-123010 + Details
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