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Fair Value Measurements (Tables)
 6 Months Ended
Jun. 30, 2022
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
The following tables set forth our assets that are measured at fair value on a recurring basis as of the dates indicated.

June 30, 2022Level 1Level 2Level 3Total
Fair Value
(In thousands)
Financial Assets
Fixed maturity securities available-for-sale:    
U.S. Treasury and U.S. Government-sponsored enterprises$9,922 3,934 — 13,856 
States and political subdivisions— 343,389 — 343,389 
Corporate48 734,714 — 734,762 
Residential mortgage-backed— 110,014 — 110,014 
Asset-backed— 34,879 — 34,879 
Foreign governments— 104 — 104 
Total fixed maturity securities available-for-sale9,970 1,227,034 — 1,237,004 
Equity securities:    
Stock mutual funds3,148 — — 3,148 
Bond mutual funds4,407 — — 4,407 
Common stock981 — — 981 
Non-redeemable preferred stock11 — — 11 
Non-redeemable preferred stock fund4,164 — — 4,164 
Total equity securities12,711 — — 12,711 
Other long-term investments (1)
— — — 64,732 
Total financial assets$22,681 1,227,034 — 1,314,447 
(1) In accordance with Subtopic 820-10, certain investments that are measured at fair value using the net asset value per share (or its equivalent) practical expedient are not classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the consolidated balance sheet.
December 31, 2021Level 1Level 2Level 3Total
Fair Value
(In thousands)
Financial Assets
Fixed maturity securities available-for-sale:    
U.S. Treasury and U.S. Government-sponsored enterprises$10,611 4,459 — 15,070 
States and political subdivisions— 383,958 — 383,958 
Corporate51 892,957 — 893,008 
Residential mortgage-backed— 133,795 — 133,795 
Asset-backed— 44,676 — 44,676 
Foreign governments— 110 — 110 
Total fixed maturity securities available-for-sale10,662 1,459,955 — 1,470,617 
Equity securities:    
Stock mutual funds3,571 — — 3,571 
Bond mutual funds5,060 — — 5,060 
Common stock990 — — 990 
Non-redeemable preferred stock161 — — 161 
Non-redeemable preferred stock fund5,062 — — 5,062 
Total equity securities14,844 — — 14,844 
Other long-term investments (1)
— — — 56,038 
Total financial assets$25,506 1,459,955 — 1,541,499 
(1) In accordance with Subtopic 820-10, certain investments that are measured at fair value using the net asset value per share (or its equivalent) practical expedient are not classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the consolidated balance sheet.
Fair Value Measurements, Recurring and Nonrecurring These investments are included in other long-term investments on the consolidated balance sheets.
June 30, 2022December 31, 2021
Fair Value
 Using NAV Per Share		Unfunded Commit-
ments		Range
(in years)		Fair Value
 Using NAV Per Share		Unfunded Commit-
ments		Range
(in years)
(In thousands, except years)
Limited partnerships
Middle marketInvestments in privately-originated, performing senior secured debt primarily in North America-based companies$31,776 8,326 5$21,947 18,712 10
Global equity fundInvestments in common stocks of U.S., international developed and emerging markets with a focus on long-term capital growth8,707 — 010,607 — 0
Late-stage growthInvestments in private late-stage, established companies seeking capital to accelerate growth prior to an IPO or sale19,314 27,256 
5 to 7
20,468 4,459 6
InfrastructureInvestments in climate infrastructure assets, focusing on renewable power generation in wind and solar energy4,935 14,988 113,016 16,653 12
Total limited partnerships$64,732 50,570 $56,038 39,824 
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:

 June 30, 2022December 31, 2021
(In thousands)Carrying
Value		Fair
Value		Carrying
Value		Fair
Value
Financial Assets:    
Policy loans$78,586 78,586 80,307 80,307 
Commercial mortgage loan1,000 1,000 1,000 1,000 
Residential mortgage loans52 54 148 169 
Cash and cash equivalents22,407 22,407 27,294 27,294 
Financial Liabilities:    
Annuity - investment contracts65,616 62,181 64,384 72,352 
Fair Value Option, Disclosures The following table summarizes the carrying amounts of these investments.
Carrying Value
(In thousands)
June 30, 2022December 31, 2021
Other long-term investments:
Limited partnerships$64,732 56,038 
FHLB common stock192 192 
Mortgage loans1,052 1,148 
All other investments26 21 
Total other long-term investments$66,002 57,399