CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenues
Net premiums earned	$ 938,703	$ 902,340
Net investment income	98,664	49,164
Other insurance related income (loss)	(3,783)	(203)
Net realized investment losses:
Other-than-temporary impairment (OTTI) losses	(6,553)	(9,729)
Other realized investment losses	(18,497)	(56,779)
Total net realized investment losses	(25,050)	(66,508)
Total revenues	1,008,534	884,793
Expenses
Net losses and loss expenses	606,942	498,962
Acquisition costs	189,792	180,635
General and administrative expenses	161,260	149,901
Foreign exchange losses	21,465	616
Interest expense and financing costs	12,791	12,833
Total expenses	992,250	842,947
Income before income taxes and interest in income (loss) of equity method investments	16,284	41,846
Income tax benefit	9,337	6,540
Interest in income (loss) of equity method investments	(5,766)	0
Net income	19,855	48,386
Preferred share dividends	14,841	9,969
Net income available to common shareholders	$ 5,014	$ 38,417
Net income per common share:
Basic net income (in usd per share)	$ 0.06	$ 0.41
Diluted net income (in usd per share)	$ 0.06	$ 0.41
Weighted average number of common shares outstanding - basic (in shares)	86,022	94,035
Weighted average number of common shares outstanding - diluted (in shares)	86,793	94,853
Cash dividends declared per common share (in usd per share)	$ 0.38	$ 0.35