Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
ASSETS:
Fixed maturities - available for sale, at market value (amortized cost: 2016, $13,480,045; 2015, $13,276,206)	$ 13,761,652	$ 13,357,294
Fixed maturities - available for sale, at fair value	1,870	2,102
Equity securities - available for sale, at market value (cost: 2016, $123,354; 2015, $122,271)	114,388	108,940
Equity securities - available for sale, at fair value	1,313,404	1,337,733
Short-term investments	441,528	799,684
Other invested assets (cost: 2016, $1,109,186; 2015, $786,994)	1,109,186	786,994
Cash	328,943	283,658
Total investments and cash	17,070,971	16,676,405
Accrued investment income	101,789	100,942
Premiums receivable	1,475,155	1,483,090
Reinsurance receivables	920,039	894,037
Funds held by reinsureds	225,320	278,673
Deferred acquisition costs	357,335	372,351
Prepaid reinsurance premiums	176,741	164,971
Income taxes	223,507	258,541
Other assets	304,997	321,818
TOTAL ASSETS	20,855,854	20,550,828
LIABILITIES:
Reserve for losses and loss adjustment expenses	9,985,979	9,951,798
Future policy benefit reserve	58,438	58,910
Unearned premium reserve	1,588,506	1,613,390
Funds held under reinsurance treaties	20,745	13,544
Commission reserves	55,960	60,098
Other net payable to reinsurers	179,072	173,087
Losses in course of payment	137,267	112,170
4.868% Senior notes due 6/1/2044	400,000	400,000
6.6% Long term notes due 5/1/2067	238,369	238,368
Accrued interest on debt and borrowings	12,341	3,537
Equity index put option liability	43,725	40,705
Unsettled securities payable	54,984	15,314
Other liabilities	240,169	261,322
Total liabilities	$ 13,015,555	$ 12,942,243
Commitments and contingencies (Note 7)
SHAREHOLDERS' EQUITY:
Preferred shares, par value: $0.01; 50,000 shares authorized; no shares issued and outstanding
Common shares, par value: $0.01; 200,000 shares authorized; (2016) 68,776 and (2015) 68,606 outstanding before treasury shares	$ 688	$ 686
Additional paid-in capital	2,111,828	2,103,638
Accumulated other comprehensive income (loss), net of deferred income tax expense (benefit) of $22,446 at 2016 and ($15,863) at 2015	(45,299)	(231,755)
Treasury shares, at cost; 26,377 shares (2016) and 25,912 shares (2015)	(2,971,870)	(2,885,956)
Retained earnings	8,744,952	8,621,972
Total shareholders' equity	7,840,299	7,608,585
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 20,855,854	$ 20,550,828