Funds Held - Directly Managed (Tables)

12 Months Ended

Dec. 31, 2012

Disclosure - Funds Held-Directly Managed [Abstract]

Fixed maturities, short-term investments and equities

						Gross		Gross
						Unrealized		Unrealized		Fair
December 31, 2012			Cost (1)			Gains		Losses		Value
Fixed maturities
	U.S. government and government sponsored enterprises		$	211,104	$	7,669	$	(77)	$	218,696
	U.S. states, territories and municipalities			373		0		(28)		345
	Non-U.S. sovereign government, supranational
		and government related		217,961		16,039		(13)		233,987
	Corporate			341,705		20,555		(17)		362,243
Total fixed maturities				771,143		44,263		(135)		815,271
Other invested assets				26,777		619		(9,297)		18,099
Total			$	797,920	$	44,882	$	(9,432)	$	833,370
						Gross		Gross
						Unrealized		Unrealized		Fair
December 31, 2011			Cost (1)			Gains		Losses		Value
Fixed maturities
	U.S. government and government sponsored enterprises		$	255,573	$	12,966	$	0	$	268,539
	U.S. states, territories and municipalities			373		0		(39)		334
	Non-U.S. sovereign government, supranational
		and government related		260,695		14,024		(54)		274,665
	Corporate			470,546		12,889		(2,950)		480,485
Total fixed maturities				987,187		39,879		(3,043)		1,024,023
Short-term investments				18,097		0		0		18,097
Other invested assets				25,628		0		(10,063)		15,565
Total			$	1,030,912	$	39,879	$	(13,106)	$	1,057,685
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(1)Cost is amortized cost for fixed maturities and short-term investments.

Maturity distribution of fixed maturities and short-term investments

		Cost		Fair Value
One year or less	$	131,909	$	133,187
More than one year through five years		491,667		515,432
More than five years through ten years		124,560		140,641
More than ten years		23,007		26,011
Total	$	771,143	$	815,271

Net realized and unrealized investment gains (losses)

		2012		2011		2010
Net realized investment gains on fixed maturities and short-term investments	$	8,405	$	5,369	$	1,041
Net realized investment (losses) gains on other invested assets		0		(42)		1,635
Change in net unrealized investment gains on fixed maturities and short-term investments		6,583		12,314		27,568
Change in net unrealized investment gains (losses) on other invested assets		1,379		(6,430)		(2,892)
Net realized and unrealized investment gains on funds held – directly managed	$	16,367	$	11,211	$	27,352

Net investment income

		2012		2011		2010
Fixed maturities	$	27,760	$	31,542	$	46,200
Short-term investments, cash and cash equivalents		1,046		1,906		1,607
Other		1,647		5,402		6,078
Investment expenses		(1,422)		(931)		(2,110)
Net investment income on funds held – directly managed	$	29,031	$	37,919	$	51,775