Investments (Tables)

3 Months Ended

Mar. 31, 2019

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 90.0% of total cash, cash equivalents and investments at March 31, 2019. The Company's cash, cash equivalents and investments are listed below.

	March 31, 2019			December 31, 2018
	Carrying Value		% of Total Carrying Value	Carrying Value		% of Total Carrying Value
	(In thousands)			(In thousands)
Fixed maturity securities	$	1,295,514	90.0	$	1,231,039	88.7
Equity securities	15,672		1.1	15,068		1.1
Mortgage loans	185		—	186		—
Policy loans	81,474		5.7	80,825		5.8
Real estate and other long-term investments	5,715		0.4	7,223		0.5
Short-term investments	7,914		0.4	7,865		0.6
Cash and cash equivalents	34,093		2.4	45,492		3.3
Total cash, cash equivalents and investments	$	1,440,567	100.0	$	1,387,698	100.0

Debt and Equity Securities, Unrealized Gain (Loss)

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

The following tables represent the cost or amortized cost, gross unrealized gains and losses and fair value for fixed maturities as of the periods indicated.

	March 31, 2019
	Cost or Amortized Cost		Gross Unrealized Gains	Gross Unrealized Losses	Fair Value
	(In thousands)
Fixed maturities:
Available-for-sale:
U.S. Treasury securities	$	9,841	1,492	—	11,333
U.S. Government-sponsored enterprises	3,534		846	—	4,380
States and political subdivisions	686,141		12,434	460	698,115
Corporate	438,608		18,344	2,518	454,434
Commercial mortgage-backed	887		—	—	887
Residential mortgage-backed	115,463		6,021	3	121,481
Asset-backed	4,763		3	1	4,765
Foreign governments	116		3	—	119
Total fixed maturities	$	1,259,353	39,143	2,982	1,295,514

	December 31, 2018
	Cost or Amortized Cost		Gross Unrealized Gains	Gross Unrealized Losses	Fair Value
	(In thousands)
Fixed maturities:
Available-for-sale securities:
U.S. Treasury securities	$	9,864	1,410	—	11,274
U.S. Government-sponsored enterprises	3,540		740	—	4,280
States and political subdivisions	713,991		7,614	1,490	720,115
Corporate	384,817		6,725	9,746	381,796
Commercial mortgage-backed	39,694		386	66	40,014
Residential mortgage-backed	66,960		1,726	2	68,684
Asset-backed	4,764		1	8	4,757
Foreign governments	117		2	—	119
Total fixed maturities	$	1,223,747	18,604	11,312	1,231,039

Equity Securities, Restricted

Schedule of Equity Securities [Table Text Block]

Most of the Company's equity securities are diversified stock and bond mutual funds.

	March 31, 2019		December 31, 2018
	Fair Value		Fair Value
	(In thousands)
Equity securities:
Stock mutual funds	$	3,091	2,906
Bond mutual funds	12,143		11,774
Common stock	133		94
Non-redeemable preferred stock	305		294
Total equity securities	$	15,672	15,068

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 have remained in a continuous unrealized loss position for the periods indicated.

	March 31, 2019
	Less than 12 months				Greater than 12 months			Total
	Fair Value		Unrealized Losses	# of Securities	Fair Value	Unrealized Losses	# of Securities	Fair Value	Unrealized Losses	# of Securities
	(In thousands, except for # of securities)
Fixed maturities:
Available-for-sale securities:
States and political subdivisions	$	67,893	75	60	51,053	385	70	118,946	460	130
Corporate	53,090		1,747	42	19,818	771	24	72,908	2,518	66
Residential mortgage-backed	—		—	—	96	3	5	96	3	5
Asset-backed	2,001		1	2	—	—	—	2,001	1	2
Total available-for-sale securities	$	122,984	1,823	104	70,967	1,159	99	193,951	2,982	203

	December 31, 2018
	Less than 12 months				Greater than 12 months			Total
	Fair Value		Unrealized Losses	# of Securities	Fair Value	Unrealized Losses	# of Securities	Fair Value	Unrealized Losses	# of Securities
	(In thousands, except for # of securities)
Fixed maturities:
Available-for-sale securities:
States and political subdivisions	$	227,132	883	233	33,891	607	46	261,023	1,490	279
Corporate	230,030		8,770	191	9,936	976	8	239,966	9,746	199
Commercial mortgage-backed	14,992		66	11	—	—	—	14,992	66	11
Residential mortgage-backed	18		—	3	98	2	4	116	2	7
Asset-backed	3,747		8	4	—	—	—	3,747	8	4
Total fixed maturities	$	475,919	9,727	442	43,925	1,585	58	519,844	11,312	500

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.  

	Fixed Maturities, Available-for-Sale			Equity Securities
	Three Months Ended			Three Months Ended
	March 31,			March 31,
	2019		2018	2019	2018
	(In thousands)
Proceeds	$	7,659	—	—	—
Gross realized gains	$	2	—	—	—
Gross realized losses	$	183	—	—	—

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 March 31, 2019 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.

	March 31, 2019
	Amortized Cost		Fair Value
	(In thousands)
Fixed maturity securities:
Due in one year or less	$	79,036	79,178
Due after one year through five years	131,849		134,746
Due after five years through ten years	215,686		222,226
Due after ten years	832,782		859,364
Total fixed maturity securities	$	1,259,353	1,295,514