Components of Calculation of Basic Net Income Per Ordinary Share and Diluted Net Income Per Ordinary Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Jun. 29, 2013	Jun. 30, 2012
Numerator:
Net income	$ 124,996	$ 68,645
Denominator:
Basic weighted average ordinary shares	201,208,189	192,790,454
Weighted average dilutive share equivalents:
Share options and restricted shares/units	3,127,935	6,600,673
Diluted weighted average ordinary shares	204,336,124	199,391,127
Basic net income per ordinary share	$ 0.62	$ 0.36
Diluted net income per ordinary share	$ 0.61	$ 0.34