Stock-Based Compensation (Details 1) (Stock Options [Member], USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Jul. 01, 2012	Apr. 01, 2012
Stock Options [Member]
Stock option transactions
Balance at April 1, 2012, Outstanding	6,345,307
Balance at April 1, 2012, Weighted Average Exercise Price per Share	$ 7.23
Balance at April 1, 2012, Weighted Average Remaining Contractual Term (in years)	4 years 6 months 11 days	4 years 8 months 1 day
Balance at April 1, 2012, Aggregate Intrinsic Value	$ 9,474
Balance at April 1, 2012, In-the-money Options Vested and Exercisable	1,193
Granted, Outstanding	716,200
Granted, Weighted Average Exercise Price per Share	$ 8.02
Exercised, Outstanding	(312,007)
Exercised, Weighted Average Exercise Price per Share	$ 6.67
Cancelled, Outstanding	(24,151)
Cancelled, Weighted Average Exercise Price per Share	$ 7.17
Forfeited, Outstanding	(628,898)
Forfeited, Weighted Average Exercise Price per Share	$ 6.29
Balance at July 1, 2012, Outstanding	6,096,451	6,345,307
Balance at July 1, 2012, Weighted Average Exercise Price per Share	$ 7.45	$ 7.23
Balance at July 1, 2012, Weighted Average Remaining Contractual Term (in years)	4 years 6 months 11 days	4 years 8 months 1 day
Balance at July 1, 2012, Aggregate Intrinsic Value	6,658	9,474
Balance at July 1, 2012, In-the-money Options Vested and Exercisable	2,490	1,193
Vested and expected to vest, July 1, 2012, Outstanding	5,411,621
Vested and expected to vest, July 1, 2012, Weighted Average Exercise Price per Share	$ 7.53
Vested and expected to vest, July 1, 2012, Weighted Average Remaining Contractual Term (in years)	4 years 3 months 15 days
Vested and expected to vest, July 1, 2012, Aggregate Intrinsic Value	5,763
Vested and exercisable, July 1, 2012, Outstanding	2,490,125
Vested and exercisable, July 1, 2012, Weighted Average Exercise Price per Share	$ 8.48
Vested and excercisable to vest, July 1, 2012, Weighted Average Remaining Contractual Term (in years)	2 years 2 months 16 days
Vested and exercisable, July 1, 2012, Aggregate Intrinsic Value	$ 1,558