Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 39,084		$ 39,784
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	10,566		7,646
Stock-based compensation expense	9,362		5,895
Provision (benefit) for deferred income taxes	(346)		137
Restructuring charges	3,119
Net loss on disposal of assets	118
Changes in operating assets and liabilities, net of assets acquired:
Accounts receivable	(11,684)		(54,938)
Inventories	(16,028)		(31,733)
Other current assets	(482)		(2,638)
Accounts payable	(4,793)		6,645
Other current liabilities and accrued expenses	(5,796)		19,408
Income taxes	3,540		(7,621)
Non-current assets	(8)		560
Non-current liabilities			253
Net cash provided by (used in) operating activities	26,652		(16,602)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of marketable securities	(22,640)		(108,104)
Proceeds from sale of marketable securities	9,667		141,755
Purchase of PV Powered, Inc., net of cash acquired			(35,977)
Purchase of property and equipment	(14,629)		(6,921)
Net cash used in investing activities	(27,602)		(9,247)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payments on capital lease obligations	(143)		(140)
Proceeds from exercise of stock options	1,796		1,408
Excess tax benefit from stock-based compensation deduction	(572)
Net cash provided by financing activities	1,081		1,268
EFFECT OF CURRENCY TRANSLATION ON CASH	1,208		(6,959)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	1,339		(31,540)
CASH AND CASH EQUIVALENTS, beginning of period	130,914	[1]	133,106
CASH AND CASH EQUIVALENTS, end of period	132,253	[2]	101,566
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for interest	36		35
Cash paid for income taxes	17,867		19,442
Cash received for refunds of income taxes	7,522		1,679
Cash held in banks outside the United States	45,233		22,891
NONCASH TRANSACTIONS:
Common stock issued as partial consideration for PV Powered acquisition			14,690
Contingent liability accrued as part of PV Powered acquisition			39,600
Equipment purchased with capital lease	$ 26		$ 223

[1] Amounts as of December 31, 2010 are derived from the December 31,2010 audited Consolidated Financial Statements.

[2] Amounts as of September 30, 2011 are unaudited.