Unaudited Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
ASSETS:
Fixed maturity investments trading, at fair value (amortized cost: 2014: $6,010,765; 2013: $6,065,350)	$ 6,068,666	$ 6,100,798
Equity securities trading, at fair value (cost: 2014: $803,954; 2013: $647,301)	834,893	699,846
Other invested assets	989,791	911,392
Total investments	7,893,350	7,712,036
Cash and cash equivalents	565,802	531,936
Restricted cash	144,570	149,393
Insurance balances receivable	839,630	664,731
Funds held	447,801	632,430
Prepaid reinsurance	331,065	340,992
Reinsurance recoverable	1,280,525	1,234,504
Accrued investment income	29,539	32,236
Net deferred acquisition costs	167,104	126,661
Goodwill	268,376	268,376
Intangible assets	48,198	48,831
Balances receivable on sale of investments	198,640	76,544
Net deferred tax assets	36,948	37,469
Other assets	82,617	89,691
Total assets	12,334,165	11,945,830
LIABILITIES:
Reserve for losses and loss expenses	5,856,798	5,766,529
Unearned premiums	1,627,658	1,396,256
Reinsurance balances payable	160,041	173,023
Balances due on purchases of investments	171,442	104,740
Senior notes	798,573	798,499
Dividends payable	16,495	16,732
Accounts payable and accrued liabilities	86,480	170,225
Total liabilities	8,717,487	8,426,004
Commitments and contingencies
SHAREHOLDERS’ EQUITY:
Common shares: 2014: par value CHF 12.30 per share and 2013: par value CHF 12.30 per share (2014: 33,821,752; 2013: 34,492,484 shares issued and 2014: 32,908,821; 2013: 33,417,882 shares outstanding)	410,820	418,988
Treasury shares, at cost (2014: 912,931; 2013: 1,074,602)	(68,756)	(79,992)
Retained earnings	3,274,614	3,180,830
Total shareholders’ equity	3,616,678	3,519,826
Total liabilities and shareholders’ equity	$ 12,334,165	$ 11,945,830