Debt (Tables)

3 Months Ended

Apr. 01, 2012

Debt [Abstract]

Components Of Convertible Senior Notes

	April 1, 2012		December 31, 2011
	(in thousands)
Debt principal	$	190,000	$	190,000
Unamortized debt discount		30,627		33,902
Net carrying amount of the convertible debt	$	159,373	$	156,098

	For the Three Months Ended
	April 1, 2012		April 3, 2011
	(in thousands)
Contractual interest expense	$	2,161	$	2,209
Amortization of the discount component and debt issue fees		3,479		3,061
Total interest expense on the convertible debt	$	5,640	$	5,270