Goodwill and Deferred Charges and Other Non-Current Assets (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jan. 01, 2012	Jan. 02, 2011	Jan. 01, 2012	Jan. 02, 2011	Mar. 31, 2011
Amortizing assets
Gross carrying amount	$ 117,645		$ 117,645		$ 117,645
Accumulated amortization	(33,150)		(33,150)		(24,793)
Total	84,495		84,495		92,852
Amortizing intangible asset weighted average remaining period for amortization (in years)			10.7 years
Amortization expense	5,568	2,888	8,357	8,388
Expected future amortization expense
Remainder of fiscal 2012			2,719
Fiscal 2013			11,077
Fiscal 2014			10,210
Fiscal 2015			9,260
Fiscal 2016			7,829
Thereafter			43,400
Total			84,495
Trade name
Amortizing assets
Gross carrying amount	66,060		66,060		66,060
Accumulated amortization	(7,945)		(7,945)		(4,592)
Total	58,115		58,115		61,468
Technology
Amortizing assets
Gross carrying amount	17,400		17,400		17,400
Accumulated amortization	(4,218)		(4,218)		(2,410)
Total	13,182		13,182		14,990
Customer relationships and other
Amortizing assets
Gross carrying amount	34,185		34,185		34,185
Accumulated amortization	(20,987)		(20,987)		(17,791)
Total	$ 13,198		$ 13,198		$ 16,394