Quarterly Information (unaudited) (Notes)

12 Months Ended

Dec. 31, 2016

Quarterly Financial Data [Abstract]

Quarterly Financial Information (unaudited)

	2016												2015
($ in thousands)	First Quarter			Second Quarter			Third Quarter			Fourth Quarter			First Quarter			Second Quarter			Third Quarter			Fourth Quarter
Gross premiums written	$	(24,780	)	$	(4,041	)	$	(10,543	)	$	(14,473	)	$	1,062		$	(11,192	)	$	(8,710	)	$	(18,732	)
Net premiums earned	52,800			41,402			53,218			49,867			65,718			60,879			71,535			114,463
Net investment income	60,821			70,758			90,917			90,871			72,983			64,753			64,195			64,358
Net other than temporary impairment losses	(9,334		)	(7,441		)	(2,853		)	(2,191		)	(3,119		)	(1,020		)	(9,150		)	(12,370		)
Net realized investment gains	1,102			14,897			11,749			11,536			54,101			(5,353		)	2,106			2,622
Net change in fair value of credit derivatives	12,866			3,955			1,733			1,552			(2,499		)	10,293			36,952			(3,045		)
Derivative products revenue	(83,424		)	(36,331		)	(14,510		)	83,992			(37,774		)	50,999			(65,083		)	9,314
Net realized gains (losses) on extinguishment of debt	1,235			3,586			24			—			(93		)	(1,246		)	1,420			—
Income (loss) on Variable Interest Entities	(27,163		)	8,987			2,057			2,026			6,962			52,603			(21,435		)	(6,561		)
Losses and loss expenses (benefit)	(105,281		)	(52,496		)	(69,204		)	215,492			(150,952		)	(147,477		)	(133,213		)	(337,065		)
Insurance intangible amortization	50,890			39,013			44,553			40,152			37,432			38,088			39,680			54,357
Operating expenses	28,009			27,995			21,466			36,190			24,523			25,873			25,006			27,300
Interest expense	30,430			30,709			31,493			31,712			27,908			28,173			29,899			30,557
Goodwill impairment	—			—			—			—			—			—			(514,511		)	—
Pre-tax income (loss)	12,854			61,511			116,720			(86,059		)	216,580			286,095			(388,193		)	395,576
Net income (loss) attributable to Common Shareholders	$	9,415		$	58,647		$	101,474		$	(94,693	)	$	214,711		$	282,695		$	(390,987	)	$	386,984
Net income (loss) per share:
Basic	$	0.21		$	1.30		$	2.24		$	(2.09	)	$	4.75		$	6.26		$	(8.66	)	$	8.57
Diluted	$	0.21		$	1.29		$	2.22		$	(2.09	)	$	4.57		$	6.05		$	(8.66	)	$	8.56