Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Investments:
Fixed-maturity securities and Short-term investments available-for-sale, at fair value	$ 2,538,197	$ 2,464,611
Fixed-maturity security held-to-maturity, at amortized cost (fair value: $1,516,401 in 2021 and $1,606,208 in 2020)	1,362,210	1,346,350
Short-term investments available-for-sale, at fair value (amortized cost: $50,759 in 2021 and $0 in 2020)	50,758
Equity securities, at fair value (historical cost: $32,239 in 2021 and $32,031 in 2020)	39,638	38,023
Trading securities, at fair value (cost: $35,179 in 2021 and $16,359 in 2020)	35,046	16,300
Policy loans	30,278	30,199
Total investments	4,056,127	3,895,483
Cash and cash equivalents	439,944	547,569
Accrued investment income	19,964	17,618
Reinsurance recoverables	4,345,483	4,273,904
Deferred policy acquisition costs, net	2,712,169	2,629,644
Agent balances, due premiums and other receivables	268,660	259,448
Intangible assets	45,275	45,275
Income taxes	74,683	73,290
Operating lease right-of-use assets	45,318	46,567
Other assets	467,336	456,967
Separate account assets	2,638,901	2,659,520
Total assets	15,113,860	14,905,285
Liabilities:
Future policy benefits	6,885,115	6,790,557
Unearned and advance premiums	18,184	17,136
Policy claims and other benefits payable	526,654	519,711
Other policyholders’ funds	475,511	447,765
Notes payable	374,511	374,415
Surplus note	1,361,648	1,345,772
Income taxes	235,234	223,496
Operating lease liabilities	51,521	52,806
Other liabilities	582,198	566,068
Payable under securities lending	87,190	72,154
Separate account liabilities	2,638,901	2,659,520
Commitments and contingent liabilities (see Commitments and Contingent Liabilities note)
Total liabilities	13,236,667	13,069,400
Stockholders’ equity:
Common stock ($0.01 par value; authorized 500,000 shares in 2021 and 2020; issued and outstanding 39,414 shares in 2021 and 39,306 shares in 2020)	394	393
Paid-in capital	8,138
Retained earnings	1,785,038	1,705,786
Accumulated other comprehensive income (loss), net of income tax:
Unrealized foreign currency translation gains (losses)	6,570	1,578
Net unrealized investment gains (losses) on available-for-sale securities	77,053	128,128
Total stockholders’ equity	1,877,193	1,835,885
Total liabilities and stockholders’ equity	$ 15,113,860	$ 14,905,285