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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 12 Months Ended
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Jul. 02, 2011
Apr. 02, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2012
Apr. 02, 2011
Apr. 03, 2010
Numerator:                          
Net income $ 68,645 $ 43,612 $ 39,031 $ 40,606 $ 24,115 $ 24,115 $ 17,373 $ 27,790 $ 15,591 $ 11,752 $ 147,364 $ 72,506 $ 39,248
Net income applicable to preference shareholders           5,198         21,227 15,629 8,460
Net income available for ordinary shareholders $ 68,645         $ 18,917         $ 126,137 $ 56,877 $ 30,788
Denominator:                          
Basic weighted average ordinary shares 192,790,454 191,184,171 154,738,356 146,555,601 140,554,377 140,554,377 140,554,377 140,554,377 140,554,377 140,554,377 158,258,126 140,554,377 140,554,377
Weighted average dilutive share equivalents:                          
Share options and restricted shares/units 6,600,673                   2,628,650    
Convertible preference shares           38,622,891         28,412,421 38,622,891 38,622,891
Diluted weighted average ordinary shares 199,391,127 196,855,404 193,583,954 187,580,161 179,177,268 179,177,268 179,177,268 179,177,268 179,177,268 179,177,268 189,299,197 179,177,268 179,177,268
Basic net income per ordinary share $ 0.36         $ 0.13         $ 0.80 $ 0.40 $ 0.22
Diluted net income per ordinary share $ 0.34         $ 0.13         $ 0.78 $ 0.40 $ 0.22