Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
ASSETS:
Fixed maturities - available for sale, at market value (amortized cost: 2016, $13,631,263; 2015, $13,276,206)	$ 14,058,965	$ 13,357,294
Fixed maturities - available for sale, at fair value		2,102
Equity securities - available for sale, at market value (cost: 2016, $124,699; 2015, $122,271)	118,740	108,940
Equity securities - available for sale, at fair value	1,104,430	1,337,733
Short-term investments	531,511	799,684
Other invested assets (cost: 2016, $1,216,171; 2015, $786,994)	1,216,171	786,994
Cash	429,287	283,658
Total investments and cash	17,459,104	16,676,405
Accrued investment income	96,772	100,942
Premiums receivable	1,461,563	1,483,090
Reinsurance receivables	950,323	894,037
Funds held by reinsureds	242,033	278,673
Deferred acquisition costs	319,781	372,351
Prepaid reinsurance premiums	219,050	164,971
Income taxes	195,094	258,541
Other assets	338,455	316,408
TOTAL ASSETS	21,282,175	20,545,418
LIABILITIES:
Reserve for losses and loss adjustment expenses	10,263,267	9,951,798
Future policy benefit reserve	57,827	58,910
Unearned premium reserve	1,495,838	1,613,390
Funds held under reinsurance treaties	23,373	13,544
Commission reserves	85,670	60,098
Other net payable to reinsurers	224,380	173,087
Losses in course of payment	124,703	112,170
4.868% Senior notes due 6/1/2044	396,654	396,594
6.6% Long term notes due 5/1/2067	236,413	236,364
Accrued interest on debt and borrowings	3,537	3,537
Equity index put option liability	41,729	40,705
Unsettled securities payable	86,003	15,314
Other liabilities	257,313	261,322
Total liabilities	13,296,707	12,936,833
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) 68,805 and (2015) 68,606 outstanding before treasury shares	688	686
Additional paid-in capital	2,120,581	2,103,638
Accumulated other comprehensive income (loss), net of deferred income tax expense (benefit) of $57,700 at 2016 and ($15,863) at 2015	84,000	(231,755)
Treasury shares, at cost; 26,921 shares (2016) and 25,912 shares (2015)	(3,072,313)	(2,885,956)
Retained earnings	8,852,512	8,621,972
Total shareholders' equity	7,985,468	7,608,585
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 21,282,175	$ 20,545,418