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Investments (Tables)
 9 Months Ended
Sep. 30, 2022
Investments Including Short Term And Cash And Cash Equivalents [Abstract]  
Investments Including Short Term And Cash And Cash Equivalents [Table Text Block]
The Company invests primarily in fixed maturity securities, which totaled 86.9% of total cash and invested assets at September 30, 2022, as shown below.

Carrying Value
(In thousands, except for %)
September 30, 2022December 31, 2021
Amount%Amount%
Cash and invested assets:
Fixed maturity securities$1,161,048 86.9 %1,470,617 89.0 %
Equity securities11,789 0.9 %14,844 0.9 %
Policy loans78,085 5.8 %80,307 4.9 %
Other long-term investments62,717 4.7 %57,399 3.5 %
Short-term investments1,241 0.1 %— — %
Cash and cash equivalents21,007 1.6 %27,294 1.7 %
Total cash and invested assets$1,335,887 100.0 %1,650,461 100.0 %
Debt and Equity Securities, Unrealized Gain (Loss)  
Unrealized Gain (Loss) on Investments [Table Text Block]
The following tables represent the amortized cost, gross unrealized gains and losses and fair value of fixed maturity securities as of the dates indicated.
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
September 30, 2022
(In thousands)
Fixed maturity securities:    
Available-for-sale:    
U.S. Treasury securities$9,448 190 10 9,628 
U.S. Government-sponsored enterprises3,441 272 — 3,713 
States and political subdivisions349,835 1,686 36,222 315,299 
Corporate:
Financial237,294 189 46,131 191,352 
Consumer249,551 562 50,401 199,712 
Utilities114,259 5 25,643 88,621 
Energy76,175 — 13,377 62,798 
All other184,197 669 32,737 152,129 
Commercial mortgage-backed50 — — 50 
Residential mortgage-backed110,610 8 9,807 100,811 
Asset-backed39,817 — 2,984 36,833 
Foreign governments100 2 — 102 
Total fixed maturity securities$1,374,777 3,583 217,312 1,161,048 

Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
December 31, 2021
(In thousands)
Fixed maturity securities:    
Available-for-sale:    
U.S. Treasury securities$9,515 1,097 1 10,611 
U.S. Government-sponsored enterprises3,463 996 — 4,459 
States and political subdivisions356,594 28,056 692 383,958 
Corporate:
Financial213,652 22,477 172 235,957 
Consumer219,223 23,658 900 241,981 
Utilities105,738 7,358 801 112,295 
Energy76,989 7,334 68 84,255 
All other196,403 22,497 380 218,520 
Residential mortgage-backed117,755 16,046 6 133,795 
Asset-backed44,322 368 14 44,676 
Foreign governments101 9 — 110 
Total fixed maturity securities$1,343,755 129,896 3,034 1,470,617 
Equity Securities, Restricted  
Schedule of Equity Securities [Table Text Block]
Most of the Company's equity securities are diversified stock and bond mutual funds.
 
Fair Value
(In thousands)
September 30, 2022December 31, 2021
Equity securities: 
Stock mutual funds$2,865 3,571 
Bond mutual funds4,136 5,060 
Common stock769 990 
Non-redeemable preferred stock10 161 
Non-redeemable preferred stock fund4,009 5,062 
Total equity securities$11,789 14,844 
Unrealized Continuous Losses on Investments [Abstract]  
Schedule of Unrealized Loss on Investments [Table Text Block]
The following tables present the fair values and gross unrealized losses of fixed maturity securities that are not deemed to have credit losses, aggregated by investment category and length of time that individual securities have been in a continuous loss position at September 30, 2022 and December 31, 2021.

September 30, 2022Less than 12 monthsGreater than 12 monthsTotal
(In thousands, except for # of securities)Fair
Value		Unrealized
Losses		# of
Securities		Fair
Value		Unrealized
Losses		# of
Securities		Fair
Value		Unrealized
Losses		# of
Securities
Fixed maturity securities:        
Available-for-sale securities:         
U.S. Treasury securities$— — — 64 10 2 64 10 2 
U.S. Government-sponsored enterprises224 — 1 — — — 224 — 1 
States and political subdivisions202,975 35,836 255 627 386 2 203,602 36,222 257 
Corporate:
Financial185,874 45,602 253 778 529 1 186,652 46,131 254 
Consumer178,490 46,447 240 6,355 3,954 10 184,845 50,401 250 
Utilities84,016 22,774 162 4,557 2,869 6 88,573 25,643 168 
Energy62,798 13,377 83 — — — 62,798 13,377 83 
All Other142,448 31,285 183 2,799 1,452 2 145,247 32,737 185 
Commercial mortgage-backed49 — 1 — — — 49 — 1 
Residential mortgage-backed100,546 9,807 100 — — — 100,546 9,807 100 
Asset-backed34,177 2,732 41 2,655 252 6 36,832 2,984 47 
Total fixed maturity securities$991,597 207,860 1,319 17,835 9,452 29 1,009,432 217,312 1,348 

December 31, 2021Less than 12 monthsGreater than 12 monthsTotal
(In thousands, except for # of securities)Fair
Value		Unrealized
Losses		# of
Securities		Fair
Value		Unrealized
Losses		# of
Securities		Fair
Value		Unrealized
Losses		# of
Securities
Fixed maturity securities:        
Available-for-sale securities:         
U.S. Treasury securities$72 1 2 — — — 72 1 2 
States and political subdivisions21,715 692 15 — — — 21,715 692 15 
Corporate:
Financial8,059 86 15 1,227 86 1 9,286 172 16 
Consumer29,494 777 28 2,419 123 1 31,913 900 29 
Utilities19,072 401 14 4,523 400 4 23,595 801 18 
Energy7,381 68 8 — — — 7,381 68 8 
All Other14,312 380 16 — — — 14,312 380 16 
Residential mortgage-backed1,084 6 6 — — — 1,084 6 6 
Asset-backed9,078 12 11 663 2 1 9,741 14 12 
Total fixed maturity securities$110,267 2,423 115 8,832 611 7 119,099 3,034 122 
Debt and Equity Securities, Realized Gain (Loss)  
Schedule of Realized Gain (Loss) [Table Text Block]
The Company uses the specific identification method of the individual security to determine the cost basis used in the calculation of realized gains and losses related to security sales.  

Three Months EndedNine Months Ended
September 30,September 30,
(In thousands)2022202120222021
Fixed maturity securities, available-for-sale:
Proceeds$1,520 984 30,348 8,238 
Gross realized gains$19 89 120 189 
Gross realized losses$1 — 103 1 
Schedule of Maturities by Contractual Maturity Date [Abstract]  
Investments Classified by Contractual Maturity Date [Table Text Block]
The amortized cost and fair value of fixed maturity securities at September 30, 2022 by contractual maturity are shown in the table below.  Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Securities not due at a single maturity date have been reflected based upon final stated maturity.

September 30, 2022Amortized
Cost		Fair
Value
(In thousands)
Fixed maturity securities:  
Due in one year or less$22,156 22,244 
Due after one year through five years118,051 115,766 
Due after five years through ten years228,829 214,219 
Due after ten years1,005,741 808,819 
Total fixed maturity securities$1,374,777 1,161,048