Fair Value of Financial Instruments (Tables)

6 Months Ended

Oct. 30, 2011

Fair Value Disclosures [Abstract]

Fair Value, by Balance Sheet Grouping [Table Text Block]

The estimated fair values of the Company's financial instruments as of October 30, 2011 and April 30, 2011 were as follows (in thousands):

	October 30, 2011				April 30, 2011
	Carrying				Carrying
	Amount		Fair Value		Amount		Fair Value
Financial assets:
Cash and cash equivalents	$	228,040	$	228,040	$	314,765	$	314,765
Equity method investment	—		—		31,142		38,671
Total	$	228,040	$	228,040	$	345,907	$	353,436
Financial liabilities:
Convertible debt	$	40,015	$	87,105	$	40,015	$	113,023
Short-term debt	4,281		4,281		—		—
Contingent consideration	14,340		14,340		—		—
Total	$	58,636	$	105,726	$	40,015	$	113,023

Schedule of Business Acquisitions by Acquisition, Contingent Consideration [Table Text Block]

The following table presents a reconciliation of the beginning and ending balances of the Company's liabilities measured and recorded at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months ended October 31, 2011 (in thousands), consisting of contingent consideration recorded in connection with the acquisition of Ignis:

	Three Months Ended
	October 30, 2011
Balance at July 31, 2011	$	13,598
Accretion	742
Balance at October 30, 2011	$	14,340