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CONSOLIDATED STATEMENT OF CASH FLOWS (Unaudited) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Jan. 26, 2013
Jan. 28, 2012
Cash flows from operating activities    
Net income $ 28,690 $ 68,874
Adjustments to reconcile net income to cash provided by (used for) operating activities    
Loss (gain) on disposal of assets (36) 119
Gain on sale of investments (2,866) (315)
Gain on deconsolidation of VIE 0 (1,125)
Deferred income tax benefit (745) (48,042)
Restructuring 2,716 222
Provision for doubtful accounts 1,009 3,115
Depreciation and amortization 17,111 18,054
Stock-based compensation expense 8,198 4,295
Pension plan contributions (3,480) (2,790)
Change in receivables 2,457 2,548
Change in inventories (12,355) 2,203
Change in other assets (5,396) 1,972
Change in payables (6,261) (785)
Change in other liabilities 4,410 7,511
Net cash provided by operating activities 33,452 55,856
Cash flows from investing activities    
Proceeds from disposal of assets 1,484 257
Capital expenditures (21,792) (11,518)
Purchases of investments (36,353) (6,462)
Proceeds from sales of investments 12,658 6,429
Cash effects on deconsolidation of VIE 0 (971)
Acquisitions, net of cash acquired (15,832) 0
Change in restricted cash (6,937) 0
Other 0 (685)
Net cash used for investing activities (66,772) (12,950)
Cash flows from financing activities    
Payments on debt (2,372) (5,708)
Payments for debt issuance costs 0 (568)
Stock issued for stock and employee benefit plans 1,528 718
Excess tax benefit on stock option exercises 1,117 0
Purchases of common stock (5,217) (4,517)
Dividends paid (2,119)  
Net cash used for financing activities (7,063) (10,075)
Effect of exchange rate changes on cash and equivalents (6) (19)
Change in cash and equivalents (40,389) 32,812
Cash and equivalents at beginning of period 152,370 115,262
Cash and equivalents at end of period $ 111,981 $ 148,074