Computation of Earnings Per Ordinary Share and Ordinary Share Equivalent (Details) - Computation of basic and diluted earnings per share (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Basic earnings per ordinary share and ordinary share equivalents:
Net income (loss) attributable to ordinary shareholders (in Dollars)	$ 221,156	$ 225,663	$ 397,784	$ (1,621)
Weighted average ordinary shares outstanding	309,765	309,184	312,442	310,325
Basic earnings per ordinary share & ordinary share equivalents outstanding (in Dollars per share)	$ 0.71	$ 0.73	$ 1.27	$ (0.01)
Diluted earnings per ordinary share and ordinary share equivalents:
Net income (loss) attributable to ordinary shareholders	221,156	225,663	397,784	(1,621)
Impact of assumed conversion of 10.75% Units	0	11,977	0	0
Net income (loss) attributable to ordinary shareholders including impact of assumed conversion of 10.75% Units	$ 221,156	$ 237,640	$ 397,784	$ (1,621)
Weighted average ordinary shares outstanding - basic	309,765	309,184	312,442	310,325
Impact of share based compensation and certain conversion features	2,670	32,805	2,568	0
Weighted average ordinary shares outstanding - diluted	312,435	341,989	315,010	310,325
Diluted earnings per ordinary share & ordinary share equivalents outstanding (in Dollars per share)	$ 0.71	$ 0.69	$ 1.26	$ (0.01)
Dividends per ordinary share (in Dollars per share)	$ 0.11	$ 0.11	$ 0.22	$ 0.22