UNAUDITED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Apr. 02, 2011
Accounts receivable, allowance	$ 1,399	$ 1,480
Intangible assets, amortization	$ 57,710	$ 54,973
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	150,000,000	150,000,000
Common stock, issued (in shares)	25,638,171	25,301,899
Common stock, outstanding (in shares)	25,638,171	25,301,899