Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 29, 2012	Oct. 01, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 23,181	$ 45,183
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	31,558	13,649
Amortization of discount on convertible subordinated notes	12	3,135
Gain on sale of assets	(6,414)	(619)
Foreign currency gain		(7,198)
Provision for losses on inventories	5,177	4,461
Stock-based compensation expense	6,265	4,679
Provision for doubtful accounts	301	322
Loss on disposal of property and equipment	233	95
Deferred income taxes	1,306	271
Increase (decrease) in cash, net of acquisition, due to changes in:
Accounts and notes receivable	4,030	10,783
Inventories	(3,798)	(12,918)
Prepaid expenses and other assets	133	(259)
Accounts payable	(1,133)	(9,800)
Accrued payroll and related expenses	(9,384)	(6,185)
Accrued expenses and other liabilities	2,699	3,201
Other long-term liabilities	154	93
Net cash provided by operating activities	54,320	48,893
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(8,297)	(7,628)
Restricted cash	9,420
Gain on sale of assets	5,373	619
Business acquisition, net of cash acquired	(8,939)	(12,516)
Purchase of marketable securities	(4,216)	(101,773)
Proceeds from the sale of marketable securities	2,804	203,744
Net cash provided by (used in) investing activities	(3,855)	82,446
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from long-term debt		2,963
Repayment of long-term debt and obligations under capital leases	(20,443)	(131)
Proceeds from short-term borrowings	9,031	16,859
Repayment of short-term borrowings	(25,915)	(31,715)
Proceeds from the issuance of common stock under employee plans	2,434	2,866
Tax withholding payments related to net share settlement of equity awards	(3,053)	(3,435)
Net cash used in financing activities	(37,946)	(12,593)
Impact of foreign exchange rate changes on cash balances	(460)	(376)
Net increase in cash and cash equivalents	12,059	118,370
Cash and cash equivalents at beginning of period	55,701	90,992
Cash and cash equivalents at end of period	67,760	209,362
Supplemental disclosures of cash flow information:
Cash paid during the period for interest	5,048	3,890
Cash paid during the period for income taxes, net	4,865	1,580
Property and equipment accrued in accounts payable	$ 211	$ 124