OTHER INVESTMENTS (Tables)

12 Months Ended

Dec. 31, 2011

Schedule Of Other Investments [Text Block]

Year ended December 31, (U.S. dollars in thousands)	2011		2010
Alternative Investment Funds:
Arbitrage	$	132,847	$	73,010
Directional		228,544		177,785
Multi-Style		93,664		97,506
Total alternative funds		455,055		348,301
Private investment funds		87,491		79,662
Overseas deposits		91,425		80,006
Structured transactions		323,705		330,185
Other		27,586		55,416
Total other investments	$	985,262	$	893,570

Schedule Of Net Unrealized And Realized Gains (Losses) On Investments [Table Text Block]

	Net Unrealized Gains (Losses)				Net Realized Gains (Losses)
December 31, 2011 (U.S. dollars in thousands)	2011		2010		2011		2010		2009
Alternative Investment Funds	$	96,873	$	86,053	$	10,120	$	526	$	21,809
Private Investment Funds		33,725		18,098		3,585		3,049		—
Total	$	130,598	$	104,151	$	13,705	$	3,575	$	21,809

Schedule Of Structured Project Finance Loans [Table Text Block]

Year ended December 31, (U.S. dollars in thousands except term to maturity)	2011			2010
Project Finance Loans:
Aggregate carrying value	$	49,650		$	52,182
Allowance for loan losses		(9,167	)		(9,900	)
Amounts charged off		—			—
Aggregate net carrying value	$	40,483		$	42,282
Number of individual loan participations		Six			Six
Number of individual loan participations relating to the allowance for loan losses		Two			Two
Weighted average contractual term to maturity		2.13 years			3.25 years
Weighted average credit rating		BB-			BB
Range of individual credit ratings		BB+ to CCC			BB+ to B+