Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Investments:
Fixed maturity securities—held-to-maturity, at amortized cost net of allowance for credit losses of $166 and $274 in 2021 and 2020, respectively, (fair value $603,720 and $621,654 in 2021 and 2020, respectively)	$ 575,108	$ 585,130
Fixed maturity securities—available-for-sale, at fair value (amortized cost $391,687, allowance for credit losses of $0 in 2021 and amortized cost $387,665, allowance for credit losses of $0 in 2020)	411,904	414,279
Equity securities, at fair value (cost $37,682 and $35,787 in 2021 and 2020, respectively)	50,843	43,437
Short-term investments	87,279	45,898
Total investments	1,125,134	1,088,744
Cash and cash equivalents	33,074	61,757
Amounts recoverable from reinsurers (net of allowance for credit losses of $452 in 2021 and 2020)	110,717	105,803
Premiums receivable (net of allowance for credit losses of $4,803 and $4,791 in 2021 and 2020, respectively)	165,170	156,760
Deferred income taxes	14,506	13,665
Accrued interest receivable	9,669	9,274
Property and equipment, net	6,302	6,182
Deferred policy acquisition costs	18,684	17,810
Other assets	11,323	10,860
Total assets	1,494,579	1,470,855
Liabilities:
Reserves for loss and loss adjustment expenses	759,758	760,561
Unearned premiums	137,511	129,260
Amounts held for others	45,022	43,402
Policyholder deposits	40,973	41,524
Insurance-related assessments	18,441	17,995
Federal income tax payable	3,972	417
Accounts payable and other liabilities	41,276	38,880
Total liabilities	1,046,953	1,032,039
Shareholders’ equity:
Common stock: voting—$0.01 par value authorized shares—50,000,000 in 2021 and 2020; 20,589,309 and 20,589,309 shares issued and 19,331,059 and 19,331,059 shares outstanding in 2021 and 2020, respectively	206	206
Additional paid-in capital	215,468	215,316
Treasury stock, at cost (1,258,250 shares in 2021 and 2020)	(22,370)	(22,370)
Accumulated earnings	238,351	224,645
Accumulated other comprehensive income, net	15,971	21,019
Total shareholders’ equity	447,626	438,816
Total liabilities and shareholders’ equity	$ 1,494,579	$ 1,470,855