Unaudited Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
ASSETS:
Fixed maturity investments trading, at fair value (amortized cost: 2015: $6,229,608; 2014: $6,035,240)	$ 6,288,897	$ 6,069,010
Equity securities trading, at fair value (cost: 2015: $798,275; 2014: $791,206)	856,652	844,163
Other invested assets	926,407	955,509
Total investments	8,071,956	7,868,682
Cash and cash equivalents	515,070	589,339
Restricted cash	49,931	80,971
Insurance balances receivable	773,394	664,815
Funds held	479,909	724,021
Prepaid reinsurance	318,838	360,732
Reinsurance recoverable	1,350,311	1,340,256
Reinsurance recoverable on paid losses	107,071	86,075
Accrued investment income	28,267	28,456
Net deferred acquisition costs	187,246	151,546
Goodwill	280,725	278,258
Intangible assets	49,274	46,298
Balances receivable on sale of investments	46,822	47,149
Net deferred tax assets	29,922	33,615
Other assets	329,050	121,350
Total assets	12,617,786	12,421,563
LIABILITIES:
Reserve for losses and loss expenses	5,905,110	5,881,165
Unearned premiums	1,717,399	1,555,313
Reinsurance balances payable	184,322	180,060
Balances due on purchases of investments	34,396	5,428
Senior notes	798,881	798,802
Other long-term debt	19,730	19,213
Dividends payable	21,528	21,669
Accounts payable and accrued liabilities	107,353	181,622
Total liabilities	8,788,719	8,643,272
Commitments and contingencies
SHAREHOLDERS’ EQUITY:
Common shares: 2015 and 2014: par value CHF 4.10 per share (2015: 100,299,454; 2014: 100,775,256 shares issued and 2015: 95,444,669; 2014: 96,195,482 shares outstanding)	406,088	408,020
Treasury shares, at cost (2015: 4,854,785; 2014: 4,579,774)	(162,356)	(143,075)
Retained earnings	3,585,335	3,513,346
Total shareholders’ equity	3,829,067	3,778,291
Total liabilities and shareholders’ equity	$ 12,617,786	$ 12,421,563