NOTES PAYABLE AND DEBT AND FINANCING ARRANGEMENTS (Tables)

12 Months Ended

Dec. 31, 2011

Schedule of Long-term Debt Instruments [Table Text Block]

	2011				2010
(U.S. dollars in thousands)	Commitment/ Debt		In Use/ Outstanding (1)		Commitment/ Debt		In Use/ Outstanding (1)
Debt:
5-year revolver expiring 2012 (2)	$	—	$	—	$	1,000,000	$	—
4-year revolver expiring 2015 (3)		1,000,000		—		—		—
6.50% Guaranteed Senior Notes due 2012 (4)		600,000		599,971		600,000		599,294
5.25% Senior Notes due 2014		600,000		597,501		600,000		596,579
5.75% Senior Notes due 2021		400,000		395,963		—		—
8.25% Senior Notes due 2021		—		—		575,000		572,538
6.375% Senior Notes due 2024		350,000		348,592		350,000		348,482
6.25% Senior Notes due 2027		325,000		322,591		325,000		322,435
Total debt	$	3,275,000	$	2,264,618	$	3,450,000	$	2,439,328
Adjustment to carrying value – impact of fair value hedge		—		10,709		—		17,675
Carrying Value	$	3,275,000	$	2,275,327	$	3,450,000	$	2,457,003
Letters of Credit:
5 facilities – total	$	4,000,000	$	1,871,192	$	5,000,114	$	2,395,242

Schedule of Letter of Credit Facilities And Other Sources Of Collateral [Table Text Block]

Year ended December 31 (U.S. dollars thousands except percentages)	2011 (1)			2010 (2)
Revolving credit facilities (3)	$	1,000,000		$	1,000,000
Available letter of credit facilities – commitment (4)	$	4,000,000		$	5,000,114
Available letter of credit facilities – in use	$	1,871,192		$	2,395,242
Collateralized by certain of the Company’s investment portfolio		93.8	%		21.1	%