CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues
Gross premiums written	$ 148,765	$ 67,644	$ 410,927	$ 303,850
Gross premiums ceded	(2,389)	30,637	(925)	24,244
Net premiums written	146,376	98,281	410,002	328,094
Change in net unearned premium reserves	17,515	18,276	(3,640)	20,065
Net premiums earned	163,891	116,557	406,362	348,159
Net investment income	49,448	96,450	134,834	131,161
Other income (expense), net	(1)	191	(100)	(256)
Total revenues	213,338	213,198	541,096	479,064
Expenses
Loss and loss adjustment expenses incurred, net	94,366	126,624	238,989	277,268
Acquisition costs, net	53,521	33,820	137,753	107,751
General and administrative expenses	7,085	4,637	16,788	13,619
Total expenses	154,972	165,081	393,530	398,638
Income before income tax expense	58,366	48,117	147,566	80,426
Income tax expense	(90)	(645)	(540)	(707)
Net income including non-controlling interest	58,276	47,472	147,026	79,719
Income attributable to non-controlling interest in joint venture	(1,740)	(1,335)	(5,257)	(4,518)
Net income	$ 56,536	$ 46,137	$ 141,769	$ 75,201
Earnings per share
Basic	$ 1.53	$ 1.26	$ 3.85	$ 2.05
Diluted	$ 1.50	$ 1.23	$ 3.78	$ 2.01
Weighted average number of ordinary shares used in the determination of earnings per share
Basic	36,875,716	36,678,653	36,820,199	36,630,136
Diluted	37,645,053	37,402,725	37,541,623	37,360,049