Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019		Dec. 31, 2018
Investments:
Fixed-maturity securities and Short-term investments available-for-sale, at fair value	$ 2,216,260		$ 2,077,806
Fixed-maturity security held-to-maturity, at amortized cost (fair value: $1,157,585 in 2019 and $945,331 in 2018)	1,087,790		970,390
Equity securities, at fair value (historical cost: $32,212 in 2019 and $34,997 in 2018)	38,897		37,679
Trading securities, at fair value (cost: $23,295 in 2019 and $13,597 in 2018)	23,375		13,610
Policy loans	33,527		31,501
Total investments	3,399,849		3,130,986
Cash and cash equivalents	244,975		262,138
Accrued investment income	17,434		17,057
Reinsurance recoverables	4,185,850		4,141,569
Deferred policy acquisition costs, net	2,238,315		2,133,920
Agent balances, due premiums and other receivables	238,367		215,139
Intangible assets, net (accumulated amortization: $83,737 in 2019 and $82,035 in 2018)	46,409		48,111
Income taxes	65,777		59,336
Operating lease right-of-use assets	49,381
Other assets	394,058		391,291
Separate account assets	2,437,291		2,195,501
Total assets	13,317,706		12,595,048
Liabilities:
Future policy benefits	6,314,403		6,168,157
Unearned and advance premiums	17,111		15,587
Policy claims and other benefits payable	322,417		313,862
Other policyholders’ funds	377,737		370,644
Notes payable	373,848		373,661
Surplus note	1,087,117		969,685
Income taxes	206,301		187,104
Operating lease liabilities	55,662
Other liabilities	496,027		486,772
Payable under securities lending	43,867		52,562
Separate account liabilities	2,437,291		2,195,501
Commitments and contingent liabilities (see Commitments and Contingent Liabilities note)
Total liabilities	11,731,781		11,133,535
Stockholders’ equity:
Common stock ($0.01 par value; authorized 500,000 shares in 2019 and 2018; issued and outstanding 42,008 shares in 2019 and 42,694 shares in 2018)	420		427
Retained earnings	1,537,535		1,489,520
Accumulated other comprehensive income (loss), net of income tax:
Unrealized foreign currency translation gains (losses)	(8,258)		(21,064)
Net unrealized investment gains (losses) on available-for-sale securities:
Net unrealized investment gains (losses) not other-than-temporarily impaired	56,288		(7,253)
Net unrealized investment losses other-than-temporarily impaired	(60)		(117)
Total stockholders’ equity	1,585,925		1,461,513
Total liabilities and stockholders’ equity	13,317,706		12,595,048
Fixed-maturity Securities [Member]
Investments:
Fixed-maturity securities and Short-term investments available-for-sale, at fair value	2,216,260	[1]	2,069,635	[2]
Trading securities, at fair value (cost: $23,295 in 2019 and $13,597 in 2018)	$ 23,375		13,610
Short-term Investments [Member]
Investments:
Fixed-maturity securities and Short-term investments available-for-sale, at fair value			$ 8,171

[1] Includes $0.1 million of other-than-temporary impairment (“OTTI”) losses related to corporates and mortgage- and asset-backed securities recognized in accumulated other comprehensive income (loss).

[2] Includes $0.1 million of OTTI losses related to corporates and mortgage- and asset-backed securities recognized in accumulated other comprehensive income (loss).