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Net Periodic Benefit Cost Related to Defined Benefit Pension Plans (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Sep. 30, 2012
Oct. 02, 2011
Sep. 30, 2012
Oct. 02, 2011
United States Pension Plans of US Entity, Defined Benefit
       
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 162 $ 140 $ 81 $ 70
Interest cost 327 332 163 166
Expected return on plan assets (377) (352) (188) (176)
Amortization and deferral 201 116 101 58
Net periodic benefit cost 313 236 157 118
Foreign Pension Plans, Defined Benefit
       
Defined Benefit Plan Disclosure [Line Items]        
Service cost 353 353 176 172
Interest cost 1,185 1,288 591 635
Expected return on plan assets (929) (907) (465) (449)
Amortization and deferral 103 13 51 6
Net periodic benefit cost $ 712 $ 747 $ 353 $ 364