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CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (Unaudited) (USD $)
In Thousands, unless otherwise specified
Common Shares [Member]
Capital in Excess of Par Value [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Loss [Member]
Non-Controlling Interests [Member]
Total
Balance at Apr. 30, 2011 $ 51,909 $ 222,339 $ 105,872 $ (18,804) $ 2,824 $ 364,140
Comprehensive income            
Net income     87,966   942  
Unrealized loss on marketable securities arising during the period       (7)    
Reclassification adjustment for gain on marketable securities included in net income       (324)    
Translation adjustment       35 (167)  
Change in fair value of cash flow hedge       28    
Net pension amortization and net actuarial loss       (12,209)    
Total comprehensive income           76,264
Stock issued for stock and employee benefit plans, net of cancellations 835 4,011 (509)     4,337
Purchases of common stock (500) (958) (3,721)     (5,179)
Stock option and restricted stock expense   5,717 1     5,718
Tax benefit from exercise of options   223       223
Change in noncontrolling interest upon deconsolidation of VIE and other changes in noncontrolling interests         2,312 2,312
Balance at Apr. 28, 2012 52,244 231,332 189,609 (31,281) 5,911 447,815
Comprehensive income            
Net income     4,398   297 4,695
Unrealized loss on marketable securities arising during the period       (181)    
Reclassification adjustment for gain on marketable securities included in net income       (123)    
Translation adjustment       387 (154) 233
Change in fair value of cash flow hedge       81   81
Net pension amortization and net actuarial loss       476    
Total comprehensive income           5,181
Stock issued for stock and employee benefit plans, net of cancellations 339 158 (1,368)     (871)
Purchases of common stock (300) (3,607) (105)     (4,012)
Stock option and restricted stock expense   3,619       3,619
Tax benefit from exercise of options   873       873
Change in noncontrolling interest upon deconsolidation of VIE and other changes in noncontrolling interests         97 97
Balance at Jul. 28, 2012 $ 52,283 $ 232,375 $ 192,534 $ (30,641) $ 6,151 $ 452,702