Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
ASSETS
Fixed income securities, held-to-maturity – at carrying value (fair value: $240,388 – 2015; $333,961 – 2014)	$ 229,869	$ 318,137
Fixed income securities, available-for-sale – at fair value (amortized cost: $4,273,771 – 2015; $3,975,786 – 2014)	4,351,046	4,066,122
Equity securities, available-for-sale – at fair value (cost: $220,820 – 2015; $159,011 – 2014)	221,951	191,400
Short-term investments (at cost which approximates fair value)	125,855	131,972
Other investments	85,146	99,203
Total investments	5,013,867	4,806,834
Cash	15,113	23,959
Interest and dividends due or accrued	38,009	38,901
Premiums receivable, net of allowance for uncollectible accounts of: $4,612 – 2015; $4,137 – 2014	653,966	558,778
Reinsurance recoverables, net	561,364	581,548
Prepaid reinsurance premiums	148,634	146,993
Deferred federal income tax	93,062	98,449
Property and equipment – at cost, net of accumulated depreciation and amortization of: $184,406 – 2015; $172,183 – 2014	65,657	59,416
Deferred policy acquisition costs	213,666	185,608
Goodwill	7,849	7,849
Other assets	86,930	73,215
Total assets	6,898,117	6,581,550
Liabilities And Stockholders' Equity
Reserve for loss and loss expenses	3,517,751	3,477,870
Unearned premiums	1,218,884	1,095,819
Notes payable	394,309	379,297
Current federal income tax	12,607	3,921
Accrued salaries and benefits	158,044	158,382
Other liabilities	237,500	190,675
Total liabilities	5,539,095	5,305,964
Stockholders' Equity:
Preferred stock of $0 par value per share: Authorized shares: 5,000,000; no shares issued or outstanding	0	0
Common stock of $2 par value per share: Authorized shares: 360,000,000; Issued: 100,673,864 – 2015; 99,947,933 – 2014	201,348	199,896
Additional paid-in capital	320,987	305,385
Retained earnings	1,409,536	1,313,440
Accumulated other comprehensive (loss) income	(6,039)	19,788
Treasury stock - at cost (shares: 43,492,212 – 2015; 43,353,181 – 2014)	(566,810)	(562,923)
Total stockholders' equity	$ 1,359,022	$ 1,275,586
Commitments and contingencies
Total liabilities and stockholders' equity	$ 6,898,117	$ 6,581,550