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Investments (Tables)
 3 Months Ended
Mar. 31, 2020
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 90.5% of total invested assets at March 31, 2020, as shown below.

Carrying Value
(In thousands, except for %)
March 31, 2020December 31, 2019
Amount%Amount%
Cash and invested assets:
Fixed maturity securities$1,356,244  90.5 %$1,377,959  90.2 %
Equity securities19,369  1.3 %16,033  1.1 %
Policy loans81,329  5.4 %82,005  5.4 %
Real estate and other long-term investments5,751  0.4 %2,956  0.2 %
Short-term investments690  0.1 %1,301  0.1 %
Cash and cash equivalents34,944  2.3 %46,205  3.0 %
Total cash and invested assets$1,498,327  100.0 %$1,526,459  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 maturities as of the dates indicated.
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
March 31, 2020
(In thousands)
Fixed maturity securities:    
Available-for-sale:    
U.S. Treasury securities$9,690  2,152  —  11,842  
U.S. Government-sponsored enterprises3,509  1,327  —  4,836  
States and political subdivisions478,619  25,682  1,006  503,295  
Corporate:
Financial192,453  7,288  7,607  192,134  
Consumer157,768  11,921  6,457  163,232  
Energy74,475  386  11,502  63,359  
All Other228,879  10,756  6,466  233,169  
Commercial mortgage-backed401  2  15  388  
Residential mortgage-backed118,205  21,886  1  140,090  
Asset-backed50,806  8  7,037  43,777  
Foreign governments102  20  —  122  
Total fixed maturity securities$1,314,907  81,428  40,091  1,356,244  
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
December 31, 2019
(In thousands)
Fixed maturity securities:    
Available-for-sale securities:    
U.S. Treasury securities$9,709  1,638  —  11,347  
U.S. Government-sponsored enterprises3,516  1,015  —  4,531  
States and political subdivisions512,239  24,285  240  536,284  
Corporate:
Financial169,146  13,094  135  182,105  
Consumer148,575  12,591  464  160,702  
Energy74,315  4,765  115  78,965  
All Other212,714  16,022  420  228,316  
Commercial mortgage-backed1,105  —  5  1,100  
Residential mortgage-backed118,130  12,223  66  130,287  
Asset-backed44,302  11  110  44,203  
Foreign governments102  17  —  119  
Total fixed maturity securities$1,293,853  85,661  1,555  1,377,959  
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)
March 31, 2020December 31, 2019
Equity securities: 
Stock mutual funds$2,498  3,274  
Bond mutual funds11,134  12,311  
Common stock1,040  134  
Non-redeemable preferred stock4,697  314  
Total equity securities$19,369  16,033  
Unrealized Continuous Losses on Investments [Abstract]  
Schedule of Unrealized Loss on Investments [Table Text Block]
The following table presents 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 March 31, 2020.

March 31, 2020Less 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 maturities:               
Available-for-sale securities:               
States and political subdivisions$41,267  971  35  $768  35  4  $42,035  1,006  39  
Corporate:
Financial82,957  7,607  102  —  —  —  82,957  7,607  102  
Consumer53,797  6,457  62  —  —  —  53,797  6,457  62  
Energy53,378  11,502  66  —  —  —  53,378  11,502  66  
All Other80,110  6,466  91  —  —  —  80,110  6,466  91  
Commercial mortgage-backed210  15  1  —  —  —  210  15  1  
Residential mortgage-backed23  1  2  87  —  1  110  1  3  
Asset-backed40,790  7,037  42  —  —  —  40,790  7,037  42  
Total fixed maturities$352,532  40,056  401  $855  35  5  $353,387  40,091  406  
The COVID-19 pandemic has severely impacted equity and credit markets, leading to net unrealized losses of $40.1 million at March 31, 2020.
The following table presents the fair values and gross unrealized losses of fixed maturity securities that are not deemed to have other than temporary impairment ("OTTI"), aggregated by investment category and length of time that individual securities have been in a continuous loss position at December 31, 2019.

December 31, 2019Less 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 maturities:               
Available-for-sale securities:               
States and political subdivisions$24,064  163  24  $1,961  77  6  $26,025  240  30  
Corporate:
Financial13,581  135  15  —  —  —  13,581  135  15  
Consumer22,671  464  20  —  —  —  22,671  464  20  
Energy4,208  34  4  898  81  2  5,106  115  6  
All Other22,437  285  30  2,771  135  3  25,208  420  33  
Commercial mortgage-backed1,100  5  2  —  —  —  1,100  5  2  
Residential mortgage-backed1,656  65  11  91  1  3  1,747  66  14  
Asset-backed36,039  110  27  —  —  —  36,039  110  27  
Total fixed maturities$125,756  1,261  133  $5,721  294  14  $131,477  1,555  147  
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 Ended
Fixed Maturity Securities, Available-for-SaleMarch 31,
(In thousands)20202019
Proceeds$940  7,659  
Gross realized gains$—  2  
Gross realized losses$38  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, 2020 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, 2020Amortized
Cost		Fair
Value
(In thousands)
Fixed maturity securities:  
Due in one year or less$109,032  109,456  
Due after one year through five years113,913  116,458  
Due after five years through ten years215,501  222,473  
Due after ten years876,461  907,857  
Total fixed maturity securities$1,314,907  1,356,244