Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Investments:
Fixed maturity securities—held-to-maturity, at amortized cost (fair value $620,936 and $639,309 in 2018 and 2017, respectively)	$ 619,400	$ 629,668
Fixed maturity securities—available-for-sale, at fair value (cost $462,033 and $461,236 in 2018 and 2017, respectively)	459,264	465,594
Equity securities—available-for-sale, at fair value (cost $11,425 and $8,503 in 2018 and 2017, respectively)	11,425	9,282
Short-term investments	44,704	25,770
Total investments	1,134,793	1,130,314
Cash and cash equivalents	36,072	55,559
Amounts recoverable from reinsurers	94,173	90,133
Premiums receivable, net of allowance	186,798	174,234
Deferred income taxes	20,499	19,262
Accrued interest receivable	11,332	10,635
Property and equipment, net	6,774	6,128
Deferred policy acquisition costs	21,287	20,251
Federal income tax recoverable		1,761
Other assets	18,937	9,959
Total assets	1,530,665	1,518,236
Liabilities:
Reserves for loss and loss adjustment expenses	777,298	771,845
Unearned premiums	164,972	157,270
Amounts held for others	37,343	36,908
Policyholder deposits	48,331	48,364
Insurance-related assessments	28,389	28,246
Federal income tax payable	1,387
Accounts payable and other liabilities	37,767	37,076
Payable for investments purchased	3,110	13,104
Total liabilities	1,098,597	1,092,813
Shareholders’ equity:
Common stock: voting—$0.01 par value authorized shares—50,000,000 in 2018 and 2017; 20,519,165 and 20,504,165 shares issued and 19,260,915 and 19,245,915 shares outstanding in 2018 and 2017, respectively	205	204
Additional paid-in capital	210,441	210,081
Treasury stock at cost (1,258,250 shares in 2018 and 2017)	(22,370)	(22,370)
Accumulated earnings	246,028	233,896
Accumulated other comprehensive income (loss), net	(2,236)	3,612
Total shareholders’ equity	432,068	425,423
Total liabilities and shareholders’ equity	$ 1,530,665	$ 1,518,236