Computation of Earnings Per Ordinary Share and Ordinary Share Equivalent - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Basic earnings per ordinary share & ordinary share equivalents outstanding:
Net income (loss) attributable to ordinary shareholders	$ 21,885	$ 36,281
Weighted average ordinary shares outstanding - basic	291,969	255,724
Basic earnings per ordinary share & ordinary share equivalents outstanding	$ 0.07	$ 0.14
Diluted earnings per ordinary share & ordinary share equivalents outstanding:
Weighted Average Number Diluted Shares Outstanding Adjustment	4,697	4,980
Weighted average ordinary shares outstanding - diluted (in thousands of shares)	296,666	260,704
Diluted earnings per ordinary share & ordinary share equivalents outstanding	$ 0.07	$ 0.14
Dividends per ordinary share	$ 0.20	$ 0.16