Comprehensive Income (Loss) - Changes in Components of Accumulated Other Comprehensive Income, Net of Taxes (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 28, 2012	Sep. 30, 2011	Sep. 28, 2012	Sep. 30, 2011
Components Of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive income (loss), net change in foreign currency translation adjustments, beginning balance	$ 1,097	$ 2,403	$ 1,709	$ 2,095
Current period change other comprehensive income (loss) on net change in foreign currency translation adjustments	899	(1,002)	287	(694)
Accumulated other comprehensive income (loss), net change in foreign currency translation adjustments, ending balance	1,996	1,401	1,996	1,401
Accumulated other comprehensive income (loss), net change in derivatives, beginning balance	(359)	54	(270)	182
Current period change other comprehensive income (loss) on net change on derivatives	129	(593)	40	(721)
Accumulated other comprehensive income (loss), net change in derivatives, ending balance	(230)	(539)	(230)	(539)
Accumulated other comprehensive income, beginning balance	738	2,457	1,439	2,277
Current period other comprehensive income (loss), net of tax	1,028	(1,595)	327	(1,415)
Accumulated other comprehensive income, ending balance	$ 1,766	$ 862	$ 1,766	$ 862