Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 32,492		$ 19,836
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	6,813		4,709
Stock-based compensation expense	6,139		3,820
Provision (benefit) for deferred income taxes	(181)		1,351
Net loss on disposal of assets	57
Changes in operating assets and liabilities, net of assets acquired:
Accounts receivable	(7,056)		(20,526)
Inventories	(21,944)		(23,709)
Other current assets	761		(1,708)
Accounts payable	(7,483)		6,196
Other current liabilities and accrued expenses	482		12,282
Income taxes	3,333		(6,788)
Non-current assets	91		493
Non-current liabilities			133
Net cash provided by (used in) operating activities	13,504		(3,911)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of marketable securities	(7,449)		(106,152)
Proceeds from sale of marketable securities	7,001		138,519
Purchase of PV Powered, Inc., net of cash acquired			(35,977)
Purchase of property and equipment	(8,657)		(2,932)
Net cash used in investing activities	(9,105)		(6,542)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payments on capital lease obligations	(70)		(65)
Proceeds from exercise of stock options	1,862		386
Excess tax benefit from stock-based compensation deduction	(564)		15
Net cash provided by financing activities	1,228		336
EFFECT OF CURRENCY TRANSLATION ON CASH	(977)		(6,194)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	4,650		(16,311)
CASH AND CASH EQUIVALENTS, beginning of period	130,914	[1]	133,106
CASH AND CASH EQUIVALENTS, end of period	135,564	[2]	116,795
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for interest	47		23
Cash paid for income taxes	14,595		11,445
Cash received for refunds of income taxes	7,522		1,667
Cash held in banks outside the United States	49,399		27,788
NONCASH TRANSACTIONS:
Common stock issued as partial consideration for PV Powered acquisition			14,690
Contingent liability accrued as part of PV Powered acquisition			$ 38,967

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

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