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Fair Value Measurements (Tables) | 3 Months Ended
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Mar. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] | The following tables set forth our assets and liabilities that are measured at fair value on a recurring basis as of the dates indicated.
| March 31, 2016
Available-for-sale investments | Level 1 |  | Level 2 |  | Level 3 |  | Total Fair Value
| (In thousands)
Financial assets: |  |  |  |  |  |  |
Fixed maturities: |  |  |  |  |  |  |
U.S. Treasury and U.S. Government-sponsored enterprises | $ | 12,954 |  |  | 20,768 |  |  | — |  |  | 33,722 |
States and political subdivisions | — |  |  | 534,311 |  |  | — |  |  | 534,311 |
Corporate | — |  |  | 232,695 |  |  | — |  |  | 232,695 |
Commercial mortgage-backed | — |  |  | — |  |  | 123 |  |  | 123 |
Residential mortgage-backed | — |  |  | 2,746 |  |  | — |  |  | 2,746 |
Foreign governments | — |  |  | 132 |  |  | — |  |  | 132 |
Total fixed maturities | 12,954 |  |  | 790,652 |  |  | 123 |  |  | 803,729 |
Equity securities: |  |  |  |  |  |  |  |  |  |  |
Stock mutual funds | 3,075 |  |  | — |  |  | — |  |  | 3,075 |
Bond mutual funds | 18,575 |  |  | — |  |  | — |  |  | 18,575 |
Common stock | 43 |  |  | — |  |  | — |  |  | 43 |
Preferred stock | 1,855 |  |  | — |  |  | — |  |  | 1,855 |
Total equity securities | 23,548 |  |  | — |  |  | — |  |  | 23,548 |
Total financial assets | $ | 36,502 |  |  | 790,652 |  |  | 123 |  |  | 827,277 |
| December 31, 2015
Available-for-sale investments | Level 1 |  | Level 2 |  | Level 3 |  | Total Fair Value
| (In thousands)
Financial assets: |  |  |  |  |  |  |
Fixed maturities: |  |  |  |  |  |  |
U.S. Treasury and U.S. Government-sponsored enterprises | $ | 12,592 |  |  | 20,780 |  |  | — |  |  | 33,372 |
States and political subdivisions | — |  |  | 483,049 |  |  | — |  |  | 483,049 |
Corporate | — |  |  | 216,081 |  |  | — |  |  | 216,081 |
Commercial mortgage-backed | — |  |  | — |  |  | 145 |  |  | 145 |
Residential mortgage-backed | — |  |  | 2,870 |  |  | — |  |  | 2,870 |
Foreign governments | — |  |  | 131 |  |  | — |  |  | 131 |
Total fixed maturities | 12,592 |  |  | 722,911 |  |  | 145 |  |  | 735,648 |
Equity securities: |  |  |  |  |  |  |  |  |  |  |
Stock mutual funds | 3,033 |  |  | — |  |  | — |  |  | 3,033 |
Bond mutual funds | 18,504 |  |  | — |  |  | — |  |  | 18,504 |
Common stock | 43 |  |  | — |  |  | — |  |  | 43 |
Preferred stock | 1,858 |  |  | — |  |  | — |  |  | 1,858 |
Total equity securities | 23,438 |  |  | — |  |  | — |  |  | 23,438 |
Total financial assets | $ | 36,030 |  |  | 722,911 |  |  | 145 |  |  | 759,086 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] | The following table presents additional information about fixed maturity securities measured at fair value on a recurring basis that are classified as Level 3 assets and for which we have utilized significant unobservable inputs to determine fair value.
| March 31, 2016 |  | December 31, 2015
| (In thousands)
Balance at beginning of period | $ | 145 |  |  | 231 |
Total realized and unrealized gains (losses) |  |  |  |  |
Included in net income | — |  |  | — |
Included in other comprehensive income | — |  |  | (2 | )
Principal paydowns | (22 | ) |  | (84 | )
Transfer in and (out) of Level 3 | — |  |  | — |
Balance at end of period | $ | 123 |  |  | 145 |
Fair Value, by Balance Sheet Grouping [Table Text Block] | The carrying amount and fair value for the financial assets and liabilities on the consolidated balance sheets not otherwise disclosed for the periods indicated are as follows:
| March 31, 2016 |  | December 31, 2015
| Carrying Value |  | Fair Value |  | Carrying Value |  | Fair Value
| (In thousands)
Financial assets: |  |  |  |  |  |  |
Fixed maturities, held-to-maturity | $ | 255,536 |  |  | 265,186 |  |  | 259,953 |  |  | 264,966 |
Mortgage loans | 587 |  |  | 608 |  |  | 594 |  |  | 617 |
Policy loans | 62,011 |  |  | 62,011 |  |  | 60,166 |  |  | 60,166 |
Short-term investments | — |  |  | — |  |  | 251 |  |  | 251 |
Cash and cash equivalents | 45,355 |  |  | 45,355 |  |  | 82,827 |  |  | 82,827 |
Financial liabilities: |  |  |  |  |  |  |  |  |  |  |
Annuity - investment contracts | 47,943 |  |  | 50,234 |  |  | 47,222 |  |  | 46,905 |

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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19279-110258 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13476-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13467-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6447952&loc=d3e13220-108610 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13433-108611 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258 + Details
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