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Schedule I - Summary of Investments-Other Than Investments In Related Parties (Details) $ in Thousands | Dec. 31, 2015 USD ($)
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Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Recorded Cost Basis | $ 3,562,470
Fair Value | 3,758,990
Amount Which is Presented in the Balance Sheet | 3,650,130
U.S. Government or government agencies and authorities [Member] |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Recorded Cost Basis | 148,311
Fair Value | 150,226
Amount Which is Presented in the Balance Sheet | 150,226
States, municipalities and political subdivisions [Member] |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Recorded Cost Basis | 904,719
Fair Value | 940,635
Amount Which is Presented in the Balance Sheet | 940,635
Foreign governments [Member] |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Recorded Cost Basis | 5,128
Fair Value | 5,256
Amount Which is Presented in the Balance Sheet | 5,256
Public utilities bonds [Member] |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Recorded Cost Basis | 95,185
Fair Value | 96,448
Amount Which is Presented in the Balance Sheet | 96,448
All other corporate bonds [Member] |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Recorded Cost Basis | 1,195,665
Fair Value | 1,189,832
Amount Which is Presented in the Balance Sheet | 1,189,832
Certificates of deposit [Member] |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Recorded Cost Basis | 150
Fair Value | 150
Amount Which is Presented in the Balance Sheet | 150
Mortgage-backed securities [Member] |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Recorded Cost Basis | 372,905
Fair Value | 377,740
Amount Which is Presented in the Balance Sheet | 377,740
Fixed Maturities [Member] |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Recorded Cost Basis | 2,722,063
Fair Value | 2,760,287
Amount Which is Presented in the Balance Sheet | 2,760,287
Public utilities equity, trading [Member] |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Recorded Cost Basis | 9,546
Fair Value | 9,518
Amount Which is Presented in the Balance Sheet | 9,518
Banks, trusts and insurance companies, trading [Member] |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Recorded Cost Basis | 68,639
Fair Value | 67,764
Amount Which is Presented in the Balance Sheet | 67,764
Industrial, miscellaneous and all other, trading [Member] |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Recorded Cost Basis | 241,135
Fair Value | 245,071
Amount Which is Presented in the Balance Sheet | 245,071
Total Equity Securities, trading [Member] |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Recorded Cost Basis | 319,320
Fair Value | 322,353
Amount Which is Presented in the Balance Sheet | 322,353
Other long-term investments [Member] |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Recorded Cost Basis | 401,851
Fair Value | 557,114
Amount Which is Presented in the Balance Sheet | 448,254
Short-term Investments [Member] |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Recorded Cost Basis | 119,236
Fair Value | 119,236
Amount Which is Presented in the Balance Sheet | $ 119,236

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- Definition This element represents the carrying (reported) amount of the entity's investments as of the balance sheet date. This amount may represent the individual investment's or group of similar investments' original cost, fair value, or such other amount at which the investment is shown in the entity's balance sheet. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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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- Definition This item represents the original cost of the entity's investments including investments in equity securities and, as to fixed maturities, original cost reduced by repayments and adjusted for amortization of premiums or accrual of discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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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- Definition This item represents the reported amount of the entity's investments measured at fair value. Fair value is the price that would be received to sell an investment in an orderly transaction between market participants at the balance sheet [measurement] date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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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