Investments (Tables)

12 Months Ended

Dec. 31, 2023

Investments Including Short Term And Cash And Cash Equivalents [Abstract]

Investments Including Short Term And Cash And Cash Equivalents [Table Text Block]

Carrying Value as of December 31, (In thousands, except for %)	2023		%		2022		%
Cash and invested assets:
Fixed maturity securities	$	1,238,981	86.7	%	$	1,179,619	86.5	%
Equity securities	5,282		0.4		11,590		0.8
Policy loans	75,359		5.3		78,773		5.8
Other long-term investments	82,725		5.8		69,558		5.1
Short-term investments	—		—		1,241		0.1
Cash and cash equivalents	26,997		1.8		22,973		1.7
Total cash and invested assets	$	1,429,344	100.0	%	$	1,363,754	100.0	%

Debt Securities, Unrealized Gain (Loss) on Investments [Abstract]

Unrealized Gain (Loss) on Investments [Table Text Block]

The following table represents the amortized cost, gross unrealized gains and losses and fair value of fixed maturity securities as of December 31, 2023 and 2022.

December 31, 2023 (In thousands)	Amortized Cost		Gross Unrealized Gains	Gross Unrealized Losses	Fair Value
Fixed maturity securities:
Available-for-sale:
U.S. Treasury securities	$	5,983	127	48	6,062
U.S. Government-sponsored enterprises	3,404		250	1	3,653
States and political subdivisions	314,203		2,160	29,132	287,231
Corporate:
Financial	266,485		2,066	31,255	237,296
Consumer	250,672		2,145	37,094	215,723
Utilities	123,625		615	20,253	103,987
Energy	73,808		64	8,049	65,823
All other	185,153		956	21,331	164,778
Commercial mortgage-backed	171		—	—	171
Residential mortgage-backed	107,174		9	10,060	97,123
Asset-backed	58,360		290	1,516	57,134
Total fixed maturity securities	$	1,389,038	8,682	158,739	1,238,981

December 31, 2022 (In thousands)	Amortized Cost		Gross Unrealized Gains	Gross Unrealized Losses	Fair Value
Fixed maturity securities:
Available-for-sale:
U.S. Treasury securities	$	9,425	152	9	9,568
U.S. Government-sponsored enterprises	3,434		277	1	3,710
States and political subdivisions	344,208		1,114	37,964	307,358
Corporate:
Financial	243,758		512	42,383	201,887
Consumer	247,824		758	47,138	201,444
Utilities	115,738		39	23,790	91,987
Energy	76,065		—	11,395	64,670
All other	184,022		683	29,048	155,657
Commercial mortgage-backed	171		—	2	169
Residential mortgage-backed	110,582		9	10,765	99,826
Asset-backed	45,991		18	2,767	43,242
Foreign governments	100		1	—	101
Total fixed maturity securities	$	1,381,318	3,563	205,262	1,179,619

Schedule of Equity Securities [Table Text Block]

Most of the Company's equity securities are invested in a non-redeemable preferred stock fund at December 31, 2023.

Fair Value as of December 31, (In thousands)	2023		2022
Equity securities:
Stock mutual funds	$	—	2,615
Bond mutual funds	740		4,337
Common stock	665		857
Non-redeemable preferred stock	7		8
Non-redeemable preferred stock fund	3,870		3,773
Total equity securities	$	5,282	11,590

Unrealized Continuous Losses on Investments [Abstract]

Schedule of Unrealized Loss on Investments [Table Text Block]

For fixed maturity security investments that have unrealized losses as of December 31, 2023 and 2022, the gross unrealized losses and related fair values that have been in a continuous unrealized loss position by timeframe are as follows.

December 31, 2023	Less than 12 months				Greater than 12 months			Total
(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	$	1,203	40	5	65	8	2	1,268	48	7
U.S. Government-sponsored enterprises	221		1	1	—	—	—	221	1	1
States and political subdivisions	19,540		357	35	164,264	28,775	192	183,804	29,132	227
Corporate:
Financial	12,584		383	19	176,521	30,872	217	189,105	31,255	236
Consumer	10,175		265	16	176,725	36,829	223	186,900	37,094	239
Utilities	3,596		66	20	85,169	20,187	137	88,765	20,253	157
Energy	3,291		57	1	59,392	7,992	76	62,683	8,049	77
All Other	7,864		185	10	141,865	21,146	169	149,729	21,331	179
Residential mortgage-backed	849		38	5	95,806	10,022	86	96,655	10,060	91
Asset-backed	4,757		111	8	32,764	1,405	40	37,521	1,516	48
Total fixed maturity securities	$	64,080	1,503	120	932,571	157,236	1,142	996,651	158,739	1,262

December 31, 2022	Less than 12 months				Greater than 12 months			Total
(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	9	2	64	9	2
U.S. Government-sponsored enterprises	223		1	1	—	—	—	223	1	1
States and political subdivisions	189,084		30,866	242	14,184	7,098	14	203,268	37,964	256
Corporate:
Financial	182,447		39,122	237	6,144	3,261	16	188,591	42,383	253
Consumer	164,224		34,823	220	23,417	12,315	30	187,641	47,138	250
Utilities	73,483		15,959	152	16,413	7,831	18	89,896	23,790	170
Energy	59,053		9,601	75	5,617	1,794	8	64,670	11,395	83
All Other	140,955		25,337	171	7,910	3,711	15	148,865	29,048	186
Commercial mortgage-backed	168		2	2	—	—	—	168	2	2
Residential mortgage-backed	98,758		10,514	95	759	251	5	99,517	10,765	100
Asset-backed	37,067		2,485	41	4,264	282	9	41,331	2,767	50
Total fixed maturity securities	$	945,462	168,710	1,236	78,772	36,552	117	1,024,234	205,262	1,353

Schedule of Fixed Maturities [Abstract]

Investments Classified by Contractual Maturity Date [Table Text Block]

The amortized cost and fair value of fixed maturity securities at December 31, 2023 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.

(In thousands)	Amortized Cost		Fair Value
Fixed maturity securities:
Due in one year or less	$	11,055	11,017
Due after one year through five years	122,681		121,443
Due after five years through ten years	296,313		290,023
Due after ten years	958,989		816,498
Total fixed maturity securities	$	1,389,038	1,238,981

Debt and Equity Securities, Realized Gain (Loss) [Abstract]

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.

Years ended December 31, (In thousands)	2023		2022	2021
Fixed maturity securities, available-for-sale:
Proceeds	$	29,883	33,914	8,238
Gross realized gains	53		120	189
Gross realized losses	602		112	1
Equity securities:
Proceeds	$	6,631	500	7,383
Gross realized gains	568		44	—
Gross realized losses	55		—	149

Investment Income [Table Text Block]

Major categories of net investment income are summarized as follows:

Years ended December 31, (In thousands)	2023		2022	2021
Gross investment income:
Fixed maturity securities	$	60,127	58,400	55,579
Equity securities	630		650	1,024
Policy loans	6,011		6,189	6,420
Other long-term investments	4,509		2,535	809
Other	576		246	54
Total investment income	71,853		68,020	63,886
Investment expenses	(2,599)		(2,594)	(2,391)
Net investment income	$	69,254	65,426	61,495

Realized Gain (Loss) on Investments [Table Text Block]

Investment related gains (losses) are as follows:

Years ended December 31, (In thousands)	2023		2022	2021
Investment related gains (losses):
Sales, calls and maturities:
Fixed maturity securities	$	(756)	(104)	243
Equity securities	513		62	(152)
Real estate	—		—	981
Property and equipment	—		—	13
Other long-term investments	342		2,320	1,892
Investment related gains (losses)	99		2,278	2,977
Change in fair value of equity securities	(190)		(2,665)	376
Change in fair value of limited partnerships	912		(9,667)	7,452
Change in credit loss allowance	(61)		(237)	186
Net investment related gains (losses)	$	760	(10,291)	10,991