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Consolidated Statements of Cash Flow (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Sep. 23, 2012
Sep. 25, 2011
Cash flows from operating activities:    
Net income $ 16,123 $ 12,819
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 36,474 32,128
Stock-based compensation 12,485 11,440
Excess tax benefit from share-based payment arrangements (42) (261)
Loss on disposal or impairment of long-lived assets 898 775
Amortization of premium/discount on investments 2,264 1,922
Changes in operating assets and liabilities:    
Accounts receivable (10,054) (21,725)
Inventories 9,002 12,431
Prepaid expenses and other assets (3,030) 1,811
Accounts payable, trade 9,680 (13,708)
Accrued salaries and wages and other liabilities 11,886 4,013
Net cash provided by operating activities 85,686 41,645
Cash flows from investing activities:    
Purchases of property and equipment (12,597) (33,962)
Purchases of investments (179,601) (80,874)
Proceeds from maturities of investments 78,504 42,590
Proceeds from sale of property and equipment 47 2
Proceeds from sale of available-for-sale investments 12,886 236,518
Purchase of Ruud Lighting, net of cash acquired 0 (456,008)
Purchases of patent and licensing rights (5,548) (4,159)
Net cash used in investing activities (106,309) (295,893)
Cash flows from financing activities:    
Net proceeds from issuance of common stock 5,286 2,094
Excess tax benefit from share-based payment arrangements 42 261
Net cash provided by financing activities 5,328 2,355
Effects of foreign exchange changes on cash and cash equivalents 262 468
Net increase (decrease) in cash and cash equivalents (15,033) (251,425)
Cash and cash equivalents:    
Beginning of period 178,885 390,598
End of period $ 163,852 $ 139,173