Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Investments:
Fixed maturity securities—held-to-maturity, at amortized cost (fair value $599,885 and $639,309 in 2018 and 2017, respectively)	$ 602,830	$ 629,668
Fixed maturity securities—available-for-sale, at fair value (cost $473,315 and $461,236 in 2018 and 2017, respectively)	468,019	465,594
Equity securities, at fair value (cost $14,532 and $8,503 in 2018 and 2017, respectively)	14,791	9,282
Short-term investments	104,896	25,770
Total investments	1,190,536	1,130,314
Cash and cash equivalents	33,324	55,559
Amounts recoverable from reinsurers	109,269	90,133
Premiums receivable, net of allowance	178,625	174,234
Deferred income taxes	19,898	19,262
Accrued interest receivable	10,776	10,635
Property and equipment, net	6,462	6,128
Deferred policy acquisition costs	21,326	20,251
Federal income tax recoverable		1,761
Other assets	16,753	9,959
Total assets	1,586,969	1,518,236
Liabilities:
Reserves for loss and loss adjustment expenses	791,129	771,845
Unearned premiums	165,167	157,270
Amounts held for others	40,269	36,908
Policyholder deposits	47,624	48,364
Insurance-related assessments	29,814	28,246
Federal income tax payable	1,558
Accounts payable and other liabilities	38,996	37,076
Payable for investments purchased	13,416	13,104
Total liabilities	1,127,973	1,092,813
Shareholders’ equity:
Common stock: voting—$0.01 par value authorized shares—50,000,000 in 2018 and 2017; 20,528,230 and 20,504,165 shares issued and 19,269,980 and 19,245,915 shares outstanding in 2018 and 2017, respectively	205	204
Additional paid-in capital	211,156	210,081
Treasury stock, at cost (1,258,250 shares in 2018 and 2017)	(22,370)	(22,370)
Accumulated earnings	274,206	233,896
Accumulated other comprehensive income (loss), net	(4,201)	3,612
Total shareholders’ equity	458,996	425,423
Total liabilities and shareholders’ equity	$ 1,586,969	$ 1,518,236