Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
ASSETS
Available-for-sale, at fair value (amortized cost of $3,082,273 and allowance for credit losses of $237 at 3/31/24) (amortized cost of $3,054,391 and allowance for credit losses of $306 at 12/31/23)	$ 2,863,321	$ 2,855,849
Equity securities, at fair value (cost - $362,527 at 3/31/24 and $354,022 at 12/31/23)	643,367	590,041
Short-term investments, at cost which approximates fair value	147,186	134,923
Other invested assets	59,273	59,081
Cash	44,557	36,424
Total investments and cash	3,757,704	3,676,318
Accrued investment income	25,353	24,062
Premiums and reinsurance balances receivable, net of allowances for uncollectible amounts of $21,699 at 3/31/24 and $21,438 at 12/31/23	230,537	221,206
Ceded unearned premium	107,822	112,257
Reinsurance balances recoverable on unpaid losses and settlement expenses, net of allowances for uncollectible amounts of $11,085 at 3/31/24 and $10,608 at 12/31/23	814,676	757,349
Deferred policy acquisition costs	152,924	146,566
Property and equipment, at cost, net of accumulated depreciation of $75,558 at 3/31/24 and $74,279 at 12/31/23	46,536	46,715
Investment in unconsolidated investees	66,134	56,966
Goodwill and intangibles	53,562	53,562
Income taxes-deferred	10,700	15,872
Other assets	72,461	69,348
TOTAL ASSETS	5,338,409	5,180,221
Liabilities
Unpaid losses and settlement expenses	2,532,190	2,446,025
Unearned premiums	904,848	892,326
Reinsurance balances payable	35,157	71,507
Funds held	106,430	101,446
Income taxes-current	25,455	3,757
Debt	100,000	100,000
Accrued expenses	68,216	108,880
Other liabilities	45,361	42,766
TOTAL LIABILITIES	3,817,657	3,766,707
Shareholders' Equity
Common stock ($0.01 par value) (Shares authorized - 200,000,000) (68,640,095 shares issued, 45,709,881 shares outstanding at 3/31/24) (68,570,261 shares issued, 45,640,047 shares outstanding at 12/31/23)	687	686
Paid-in capital	366,701	362,345
Accumulated other comprehensive earnings (loss)	(178,974)	(166,303)
Retained earnings	1,725,337	1,609,785
Deferred compensation	12,749	13,539
Treasury shares, at cost (22,930,214 shares at 3/31/24 and 12/31/23)	(405,748)	(406,538)
TOTAL SHAREHOLDERS' EQUITY	1,520,752	1,413,514
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 5,338,409	$ 5,180,221