Monolithic Power Systems (MPWR) 10-Q 9 Nov 22 2022 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2022	Nov. 02, 2022
Document Information [Line Items]
Entity Central Index Key	0001280452
Entity Registrant Name	MONOLITHIC POWER SYSTEMS INC
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2022
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2022
Document Transition Report	false
Entity File Number	000-51026
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	77-0466789
Entity Address, Address Line One	5808 Lake Washington Blvd. NE
Entity Address, City or Town	Kirkland
Entity Address, State or Province	WA
Entity Address, Postal Zip Code	98033
City Area Code	425
Local Phone Number	296-9956
Title of 12(b) Security	Common Stock, par value $0.001 per share
Trading Symbol	MPWR
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		46,942,000

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 316,210	$ 189,265
Short-term investments	419,837	535,817
Accounts receivable, net	153,404	104,813
Inventories	397,435	259,417
Other current assets	36,571	35,540
Total current assets	1,323,457	1,124,852
Property and equipment, net	343,123	362,962
Goodwill	6,571	6,571
Deferred tax assets, net	23,905	21,917
Other long-term assets	234,165	69,523
Total assets	1,931,221	1,585,825
Current liabilities:
Accounts payable	78,673	83,027
Accrued compensation and related benefits	103,253	62,635
Other accrued liabilities	109,062	81,282
Total current liabilities	290,988	226,944
Income tax liabilities	49,963	47,669
Other long-term liabilities	59,561	67,227
Total liabilities	400,512	341,840
Commitments and contingencies
Stockholders’ equity:
Common stock and additional paid-in capital: $0.001 par value; shares authorized: 150,000; shares issued and outstanding: 46,941 and 46,256, respectively	938,993	803,226
Retained earnings	633,640	424,879
Accumulated other comprehensive income (loss)	(41,924)	15,880
Total stockholders’ equity	1,530,709	1,243,985
Total liabilities and stockholders’ equity	$ 1,931,221	$ 1,585,825

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares shares in Thousands	Sep. 30, 2022	Dec. 31, 2021
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	150,000	150,000
Common stock, shares issued (in shares)	46,941	46,256
Common stock, shares outstanding (in shares)	46,941	46,256

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue	$ 495,418	$ 323,522	$ 1,334,136	$ 871,294
Cost of revenue	204,516	137,211	553,393	379,709
Gross profit	290,902	186,311	780,743	491,585
Operating expenses:
Research and development	67,263	49,468	178,497	136,113
Selling, general and administrative	69,717	56,291	207,538	164,982
Litigation expense	2,051	3,421	4,815	6,645
Total operating expenses	139,031	109,180	390,850	307,740
Operating income	151,871	77,131	389,893	183,845
Other income (expense), net	5	793	(5,720)	6,411
Income before income taxes	151,876	77,924	384,173	190,256
Income tax expense	27,539	9,154	65,591	20,904
Net income	$ 124,337	$ 68,770	$ 318,582	$ 169,352
Net income per share
Basic (in dollars per share)	$ 2.66	$ 1.50	$ 6.83	$ 3.70
Diluted (in dollars per share)	$ 2.57	$ 1.44	$ 6.60	$ 3.55
Weighted-average shares outstanding:
Basic (in shares)	46,829	45,970	46,643	45,754
Diluted (in shares)	48,349	47,852	48,295	47,772

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Net income	$ 124,337	$ 68,770	$ 318,582	$ 169,352
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(26,081)	(371)	(49,844)	2,592
Change in unrealized loss on available-for-sale securities, net of tax of $130, $32, $865 and $177, respectively	(1,157)	(268)	(7,960)	(1,070)
Other comprehensive income (loss), net of tax:	(27,238)	(639)	(57,804)	1,522
Comprehensive income	$ 97,099	$ 68,131	$ 260,778	$ 170,874

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Change in unrealized gain (loss) on available-for-sale securities, tax	$ 130	$ 32	$ 865	$ 177

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Common Stock Including Additional Paid in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2020	45,267
Balance at Dec. 31, 2020	$ 657,701	$ 298,746	$ 10,140	$ 966,587
Net income	0	169,352	0	169,352
Other comprehensive income (loss)	0	0	1,522	1,522
Dividends and dividend equivalents declared	$ 0	(86,905)	0	(86,905)
Common stock issued under the employee equity incentive plan (in shares)	807
Common stock issued under the employee equity incentive plan	$ 15,147	0	0	15,147
Common stock issued under the employee stock purchase plan (in shares)	17
Common stock issued under the employee stock purchase plan	$ 4,670	0	0	4,670
Stock-based compensation expense	92,340	0	0	92,340
Other comprehensive loss	$ 0	0	1,522	1,522
Balance (in shares) at Sep. 30, 2021	46,091
Balance at Sep. 30, 2021	$ 769,858	381,193	11,662	1,162,713
Balance (in shares) at Jun. 30, 2021	45,917
Balance at Jun. 30, 2021	$ 733,672	341,382	12,301	1,087,355
Net income	0	68,770	0	68,770
Other comprehensive income (loss)	0	0	(639)	(639)
Dividends and dividend equivalents declared	$ 0	(28,959)	0	(28,959)
Common stock issued under the employee equity incentive plan (in shares)	167
Common stock issued under the employee equity incentive plan	$ 2,227	0	0	2,227
Common stock issued under the employee stock purchase plan (in shares)	7
Common stock issued under the employee stock purchase plan	$ 2,377	0	0	2,377
Stock-based compensation expense	31,582	0	0	31,582
Other comprehensive loss	$ 0	0	(639)	(639)
Balance (in shares) at Sep. 30, 2021	46,091
Balance at Sep. 30, 2021	$ 769,858	381,193	11,662	$ 1,162,713
Balance (in shares) at Dec. 31, 2021	46,256			46,256
Balance at Dec. 31, 2021	$ 803,226	424,879	15,880	$ 1,243,985
Net income	0	318,582	0	318,582
Other comprehensive income (loss)	0	0	(57,804)	(57,804)
Dividends and dividend equivalents declared	$ 0	(109,821)	0	(109,821)
Common stock issued under the employee equity incentive plan (in shares)	671
Common stock issued under the employee equity incentive plan	$ 4,345	0	0	4,345
Common stock issued under the employee stock purchase plan (in shares)	14
Common stock issued under the employee stock purchase plan	$ 5,877	0	0	5,877
Stock-based compensation expense	125,545	0	0	125,545
Other comprehensive loss	$ 0	0	(57,804)	$ (57,804)
Balance (in shares) at Sep. 30, 2022	46,941			46,941
Balance at Sep. 30, 2022	$ 938,993	633,640	(41,924)	$ 1,530,709
Balance (in shares) at Jun. 30, 2022	46,787
Balance at Jun. 30, 2022	$ 891,888	545,920	(14,686)	1,423,122
Net income	0	124,337	0	124,337
Other comprehensive income (loss)	0	0	(27,238)	(27,238)
Dividends and dividend equivalents declared	$ 0	(36,617)	0	(36,617)
Common stock issued under the employee equity incentive plan (in shares)	147
Common stock issued under the employee equity incentive plan	$ 1,014	0	0	1,014
Common stock issued under the employee stock purchase plan (in shares)	7
Common stock issued under the employee stock purchase plan	$ 3,091	0	0	3,091
Stock-based compensation expense	43,000	0	0	43,000
Other comprehensive loss	$ 0	0	(27,238)	$ (27,238)
Balance (in shares) at Sep. 30, 2022	46,941			46,941
Balance at Sep. 30, 2022	$ 938,993	$ 633,640	$ (41,924)	$ 1,530,709

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parentheticals) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Dividends and dividend equivalents declared per share (in dollars per share)	$ 0.75	$ 0.60	$ 2.25	$ 1.80

Condensed Consolidated Statem_6

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash flows from operating activities:
Net income	$ 318,582	$ 169,352
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	28,349	20,376
Amortization of premium on available-for-sale securities	3,682	3,231
(Gain) loss on deferred compensation plan investments	8,607	(2,640)
Deferred taxes, net	(1,217)	1,004
Stock-based compensation expense	125,723	92,282
Other	97	(8)
Accounts receivable	(48,608)	(13,033)
Inventories	(138,241)	(50,968)
Other assets	(172,050)	(14,051)
Accounts payable	6,274	30,032
Accrued compensation and related benefits	45,054	30,030
Income tax liabilities	5,734	4,088
Other accrued liabilities	12,485	22,109
Net cash provided by operating activities	194,471	291,804
Cash flows from investing activities:
Purchases of property and equipment	(46,002)	(76,849)
Purchases of short-term investments	(16,243)	(354,171)
Purchases of long-term investments	(2,084)	0
Maturities and sales of short-term investments	104,666	94,192
Sales of long-term investments	325	400
Contributions to deferred compensation plan, net	(2,993)	(1,917)
Purchases of intangible assets	0	(793)
Net cash provided by (used in) investing activities	37,669	(339,138)
Cash flows from financing activities:
Property and equipment purchased on extended payment terms	(1,587)	(2,049)
Proceeds from common stock issued under the employee equity incentive plan	4,345	15,147
Proceeds from common stock issued under the employee stock purchase plan	5,877	4,670
Dividends and dividend equivalents paid	(101,564)	(80,725)
Net cash used in financing activities	(92,929)	(62,957)
Effect of change in exchange rates	(12,275)	1,431
Net increase (decrease) in cash, cash equivalents and restricted cash	126,936	(108,860)
Cash, cash equivalents and restricted cash, beginning of period	189,389	335,071
Cash, cash equivalents and restricted cash, end of period	316,325	226,211
Supplemental disclosures for cash flow information:
Cash paid for taxes	61,430	16,217
Non-cash investing and financing activities:
Liability accrued for property and equipment purchases	4,710	7,144
Liability accrued for dividends and dividend equivalents	$ 39,672	$ 31,911

Note 1 - Basis of Presentation

Note 1 - Basis of Presentation	9 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Significant Accounting Policies [Text Block]	1. The accompanying unaudited condensed consolidated financial statements have been prepared by Monolithic Power Systems, Inc. (the “Company” or “MPS”) in accordance with the rules and regulations of the Securities and Exchange Commission (the “SEC”). Certain information and disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) have been condensed or omitted in accordance with these accounting principles, rules and regulations. The information in this report should be read in conjunction with the Company’s audited consolidated financial statements and notes thereto included in the Annual Report on Form 10 December 31, 2021, February 25, 2022. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments (consisting only of normal recurring adjustments) necessary to present fairly the Company’s financial position, results of operations and cash flows for the interim periods presented. The financial statements contained in this Quarterly Report on Form 10 not may December 31, 2022 Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, and reported amounts of revenue and expenses during the reporting period. Significant estimates and assumptions used in these condensed consolidated financial statements primarily include those related to revenue recognition, inventory valuation, valuation of share-based awards, contingencies and income tax valuation allowances. Actual results could differ from these estimates and assumptions, and any such differences may Neither the COVID- 19 three nine September 30, 2022. not

Note 2 - Revenue Recognition

Note 2 - Revenue Recognition	9 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Revenue from Contract with Customer [Text Block]	2. REVENUE RECOGNITION Revenue from Product Sales The Company generates revenue primarily from product sales, which include assembled and tested integrated circuits (“ICs”), as well as dies in wafer form. These product sales accounted for 98% and 96% of the Company’s total revenue for the three September 30, 2022 2021 , nine September 30, 2022 2021, third not 7 The Company sells its products primarily through third three September 30, 2022 2021, nine September 30, 2022 2021, not The Company recognizes revenue when it satisfies a performance obligation by transferring control of the promised goods or services to its customers, in an amount that reflects the consideration the Company expects to be entitled to in exchange for those goods or services. The Company excludes taxes assessed by government authorities, such as sales taxes, from revenue. Product sales consist of a single performance obligation that the Company satisfies at a point in time. The Company recognizes product revenue from distributors and direct end customers when the following events have occurred: (a) the Company has transferred physical possession of the products, (b) the Company has a present right to payment, (c) the customer has legal title to the products, and (d) the customer bears significant risks and rewards of ownership of the products. In accordance with the shipping terms specified in the contracts, these criteria are generally met when the products are shipped from the Company’s facilities (such as the “Ex Works” shipping term) or delivered to the customers’ locations (such as the “Delivered Duty Paid” shipping term). Under certain consignment agreements, revenue is not not Variable Consideration The Company accounts for price adjustment and stock rotation rights as variable consideration that reduces the transaction price and recognizes that reduction in the same period the associated revenue is recognized. Four U.S.-based distributors have price adjustment rights when they sell the Company’s products to their end customers at a price that is lower than the distribution price invoiced by the Company. When the Company receives claims from the distributors that products have been sold to the end customers at the lower prices, the Company issues the distributors credit memos for the price adjustments. The Company estimates the price adjustments using the expected value method based on an analysis of historical claims, at both the distributor and product level, as well as an assessment of any known trends of product sales mix. Other U.S. distributors and non-U.S. distributors do not Certain distributors have limited stock rotation rights that permit the return of a small percentage of the previous six Contract Balances Accounts Receivable: The Company records a receivable when it has an unconditional right to receive consideration after the performance obligations are satisfied. As of September 30, 2022 December 31, 2021 , 30 90 not may not Contract Liabilities: For certain customers located in Asia, the Company requires cash payments two September 30, 2022 December 31, 2021 , nine September 30, 2022 nine September 30, 2022 , December 31, 2021 . Practical Expedients The Company has elected the practical expedient to expense sales commissions as incurred because the amortization period would have been one The Company’s standard payment terms generally require customers to pay 30 to 90 days after the Company satisfies the performance obligations. For those customers who are required to pay in advance, the Company satisfies the performance obligations generally within a quarter. The Company has elected not The Company’s unsatisfied performance obligations primarily include products held in consignment arrangements and customer purchase orders for products that the Company has not one not

Note 3 - Stock-based Compensati

Note 3 - Stock-based Compensation	9 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Share-Based Payment Arrangement [Text Block]	3. 2014 In April 2013, 2014 “2014 June 2013. October 2014, 2014 2014 November 13, 2014 April 2020, 2014 2014 June 2020. 2014 June 11, 2020 2014 June 11, 2030. September 30, 2022, 2014 Stock-Based Compensation Expense The Company recognized stock-based compensation expenses as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Cost of revenue $ 1,186 $ 922 $ 3,691 $ 2,622 Research and development 9,287 6,646 26,875 19,564 Selling, general and administrative 32,524 24,004 95,157 70,096 Total stock-based compensation expense $ 42,997 $ 31,572 $ 125,723 $ 92,282 Tax benefit related to stock-based compensation (1) $ 654 $ 488 $ 1,879 $ 1,299 ( 1 Amount reflects the tax benefit related to stock-based compensation recorded for equity awards that are expected to generate tax deductions when they vest in future periods. Equity awards granted to the Company’s executive officers are subject to the tax deduction limitations set by Section 162 Restricted Stock Units ( RSUs ) The Company’s RSUs include time-based RSUs, RSUs with performance conditions (“PSUs”), RSUs with market conditions (“MSUs”), and RSUs with both market and performance conditions (“MPSUs”). Vesting of awards with performance conditions or market conditions is subject to the achievement of pre-determined performance goals and the approval of such achievement by the Compensation Committee of the Board of Directors (the “Compensation Committee”). All awards include service conditions which require continued employment with the Company. A summary of RSU activity is presented in the table below (in thousands, except per-share amounts): Time-Based RSUs PSUs and MPSUs MSUs Total Number of Shares Weighted-Average Grant Date Fair Value Per Share Number of Shares Weighted-Average Grant Date Fair Value Per Share Number of Shares Weighted-Average Grant Date Fair Value Per Share Number of Shares Weighted-Average Grant Date Fair Value Per Share Outstanding at January 1, 2022 125 $ 235.82 1,166 $ 222.78 1,218 $ 44.59 2,509 $ 136.87 Granted 44 $ 396.77 442 (1) $ 363.74 120 $ 270.15 606 $ 347.57 Vested (53 ) $ 188.73 (375 ) $ 141.02 (243 ) $ 23.57 (671 ) $ 102.22 Forfeited (6 ) $ 308.76 (1 ) $ 374.87 (6 ) $ 216.37 (13 ) $ 268.11 Outstanding at September 30, 2022 110 $ 318.11 1,232 $ 298.24 1,089 $ 73.23 2,431 $ 198.26 ( 1 Amount reflects the number of awards that may The intrinsic value related to vested RSUs was $62.3 million and $76.8 million for the three September 30, 2022 2021, nine September 30, 2022 2021, September 30, 2022, September 30, 2022, two Cash proceeds from vested PSUs with a purchase price requirement totaled $4.3 million and $15.1 million for the nine September 30, 2022 2021, Time-Based RSUs: For the nine September 30, 2022, four one 2022 In February 2022, two “February 2022 first February 2022 two 2022 2023 two February 2022 first 2024 February 2022 two second February 2022 three February 2022 second first 2025 second one February 2022 In February 2022, 2023 two 2022 2023 two “2022 2022 2022 first 2024 2022 two 2022 The February 2022 2022 $30 20 2022 2023 $30 first 2022. February 2022 first 2022 four February 2022 second In October 2022, February 2022 three “October 2022 October 2022 three February 2022 October 2022 October 2022 October 2022 not 10 not 2022 In February 2022, “2022 2022 five February 3, 2022 February 3, 2025. third 2022. 2022 second third February 3, 2025. 2022 The Company determined the grant date fair value of the 2022 six 2004 ESPP ) For each of the three September 30, 2022 2021, nine September 30, 2022 2021, September 30, 2022, The intrinsic value of the shares issued was $0.9 million and $1.0 million for the three September 30, 2022 2021, nine September 30, 2022 2021, September 30, 2022, first 2023. Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Expected term (in years) 0.5 0.5 0.5 0.5 Expected volatility 63.2 % 43.0 % 50.6 % 43.2 % Risk-free interest rate 3.1 % 0.1 % 1.9 % 0.1 % Dividend yield 0.6 % 0.5 % 0.6 % 0.6 % Cash proceeds from the shares issued under the ESPP were $5.9 million and $4.7 million for the nine September 30, 2022 2021,

Note 4 - Balance Sheet Componen

Note 4 - Balance Sheet Components	9 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Supplemental Balance Sheet Disclosures [Text Block]	4. Inventories Inventories consist of the following (in thousands): September 30, December 31, 2022 2021 Raw materials $ 83,313 $ 29,478 Work in process 155,904 130,029 Finished goods 158,218 99,910 Total $ 397,435 $ 259,417 Other Current Assets Other current assets consist of the following (in thousands): September 30, December 31, 2022 2021 RSU tax withholding proceeds receivable $ 11,957 $ 16,224 Prepaid expenses 9,197 9,526 Accrued interest receivable 7,676 5,440 Assets for product returns 4,969 1,596 Other 2,772 2,754 Total $ 36,571 $ 35,540 Other Long-Term Assets Other long-term assets consist of the following (in thousands): September 30, December 31, 2022 2021 Deferred compensation plan assets $ 47,516 $ 53,172 Prepaid expenses 173,229 2,311 Other 13,420 14,040 Total $ 234,165 $ 69,523 As of September 30, 2022, 8 Other Accrued Liabilities Other accrued liabilities consist of the following (in thousands): September 30, December 31, 2022 2021 Dividends and dividend equivalents $ 40,823 $ 32,364 Warranty 22,644 20,989 Stock rotation and sales returns 22,757 5,748 Customer prepayments 3,417 4,300 Income tax payable 8,296 4,921 Other 11,125 12,960 Total $ 109,062 $ 81,282 As of September 30, 2022, December 31, 2021. Other Long-Term Liabilities Other long-term liabilities consist of the following (in thousands): September 30, December 31, 2022 2021 Deferred compensation plan liabilities $ 49,417 $ 55,489 Dividend equivalents 8,267 8,470 Other 1,877 3,268 Total $ 59,561 $ 67,227

Note 5 - Leases

Note 5 - Leases	9 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Leases Disclosure [Text Block]	5. Lessee The Company has operating leases primarily for administrative and sales and marketing offices, manufacturing operations and research and development facilities, employee housing units and certain equipment. These leases have remaining lease terms from less than one four two not The following table summarizes the balances of operating lease right-of-use (“ROU”) assets and liabilities (in thousands): September 30, December 31, Financial Statement Line Item 2022 2021 Operating lease ROU assets Other long-term assets $ 4,617 $ 6,297 Operating lease liabilities Other accrued liabilities $ 2,263 $ 2,539 Other long-term liabilities $ 1,877 $ 3,268 The following tables summarize certain information related to the leases (in thousands, except percentages): Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Lease costs: Operating lease costs $ 656 $ 623 $ 2,061 $ 1,694 Other 454 140 1,259 387 Total lease costs $ 1,110 $ 763 $ 3,320 $ 2,081 Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 649 $ 612 $ 2,115 $ 1,622 ROU assets obtained in exchange for new operating lease liabilities $ 13 $ 793 $ 1,071 $ 4,477 September 30, December 31, 2022 2021 Weighted-average remaining lease term (in years) 2.3 2.8 Weighted-average discount rate 2.0 % 2.0 % As of September 30, 2022, 2022 (remaining three months) $ 674 2023 1,999 2024 967 2025 590 2026 7 Total remaining lease payments 4,237 Less: imputed interest (97 ) Total lease liabilities $ 4,140 As of September 30, 2022 , no not Lessor The Company owns certain office buildings and leases a portion of these properties to third one four five For the three September 30, 2022 2021, nine September 30, 2022 2021, September 30, 2022, 2022 (remaining three months) $ 554 2023 1,557 2024 607 2025 102 2026 18 Total $ 2,838

Note 6 - Net Income Per Share

Note 6 - Net Income Per Share	9 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Earnings Per Share [Text Block]	6. Basic net income per share is computed by dividing net income by the weighted-average number of common shares outstanding for the period. Diluted net income per share reflects the potential dilution that would occur if outstanding securities or other contracts to issue common stock were exercised or converted into common shares, and calculated using the treasury stock method. Contingently issuable shares, including equity awards with performance conditions or market conditions, are considered outstanding common shares and included in the basic net income per share as of the date that all necessary conditions to earn the awards have been satisfied. Prior to the end of the contingency period, the number of contingently issuable shares included in the diluted net income per share is based on the number of shares, if any, that would be issuable under the terms of the arrangement at the end of the reporting period. The Company’s RSUs contain forfeitable rights to receive cash dividend equivalents, which are accumulated and paid to the employees when the underlying RSUs vest. Dividend equivalents accumulated on the underlying RSUs are forfeited if the employees do not not not The following table sets forth the computation of basic and diluted net income per share (in thousands, except per-share amounts): Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Numerator: Net income $ 124,337 $ 68,770 $ 318,582 $ 169,352 Denominator: Weighted-average outstanding shares - basic 46,829 45,970 46,643 45,754 Effect of dilutive securities 1,520 1,882 1,652 2,018 Weighted-average outstanding shares - diluted 48,349 47,852 48,295 47,772 Net income per share: Basic $ 2.66 $ 1.50 $ 6.83 $ 3.70 Diluted $ 2.57 $ 1.44 $ 6.60 $ 3.55 Anti-dilutive common stock equivalents were not

Note 7 - Segment, Significant C

Note 7 - Segment, Significant Customers and Geographic Information	9 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	7. The Company operates in one reportable segment that includes the design, development, marketing and sale of high-performance, semiconductor-based power electronics solutions for the storage and computing, enterprise data, automotive, industrial, communications and consumer markets. The Company’s chief operating decision maker is its Chief Executive Officer, who reviews financial information presented on a consolidated basis for purposes of allocating resources and evaluating financial performance. The Company derives a majority of its revenue from sales to customers located outside North America, with geographic revenue based on the customers’ ship-to locations. The Company sells its products primarily through third 10% Three Months Ended September 30, Nine Months Ended September 30, Customer 2022 2021 2022 2021 Distributor A 25 % 24 % 24 % 26 % Distributor B 18 % 15 % 18 % 16 % Distributor C 10 % 12 % 11 % * * Represents less than 10%. The Company’s agreements with these third may may not The following table summarizes those customers with accounts receivable equal to 10% September 30, December 31, 2022 2021 Distributor A 27 % 26 % Distributor B 18 % 17 % Value-added reseller A * 12 % * Represents less than 10%. The following is a summary of revenue by geographic region (in thousands): Three Months Ended September 30, Nine Months Ended September 30, Country or Region 2022 2021 2022 2021 China $ 265,053 $ 184,796 $ 720,911 $ 509,072 Taiwan 58,920 47,048 185,025 125,756 Europe 44,885 21,328 101,279 62,498 South Korea 52,613 24,442 136,031 62,721 Southeast Asia 26,458 14,820 64,460 38,506 Japan 22,399 20,944 63,690 47,546 United States 24,965 10,091 62,384 24,935 Other 125 53 356 260 Total $ 495,418 $ 323,522 $ 1,334,136 $ 871,294 The following is a summary of revenue by product family (in thousands): Three Months Ended September 30, Nine Months Ended September 30, Product Family 2022 2021 2022 2021 Direct Current (“DC”) to DC $ 462,982 $ 307,368 $ 1,264,081 $ 827,605 Lighting Control 32,436 16,154 70,055 43,689 Total $ 495,418 $ 323,522 $ 1,334,136 $ 871,294 The following is a summary of long-lived assets by geographic region (in thousands): September 30, December 31, Country 2022 2021 China $ 194,811 $ 211,973 United States 112,982 113,805 Taiwan 18,787 19,607 Other 16,543 17,577 Total $ 343,123 $ 362,962

Note 8 - Commitments and Contin

Note 8 - Commitments and Contingencies	9 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	8. Product Warranties The Company generally provides one two no not The changes in warranty reserves are as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Balance at beginning of period $ 25,209 $ 10,873 $ 20,989 $ 6,895 Warranty provision for product sales 1,141 7,757 11,531 12,954 Settlements made (306 ) (770 ) (1,825 ) (1,739 ) Unused warranty provision (3,400 ) (84 ) (8,051 ) (334 ) Balance at end of period $ 22,644 $ 17,776 $ 22,644 $ 17,776 The warranty and unused warranty provisions for product sales included net adjustments for changes in estimates to pre-existing claims of $(3.4) million and $1.4 million for the three September 30, 2022 2021, nine September 30, 2022 2021, Purchase Commitments The Company has outstanding purchase obligations with its suppliers and other parties that require the future purchases of goods or services, which primarily consist of wafer and other inventory purchases, assembly and other manufacturing services, construction of manufacturing and research and development facilities, purchases of production and other equipment, and license arrangements. In May 2022, four September 30, 2022, Total estimated future unconditional purchase commitments to all suppliers and other parties as of September 30, 2022 2022 (remaining three months) $ 303,070 2023 420,883 2024 285,813 2025 353,952 Total $ 1,363,718 Litigation The Company is a party to actions and proceedings in the ordinary course of business, including challenges to the enforceability or validity of its intellectual property, claims that the Company’s products infringe on the intellectual property rights of others, and employment matters. The Company may may September 30, 2022 , no

Note 9 - Cash, Cash Equivalents

Note 9 - Cash, Cash Equivalents, Investments and Restricted Cash	9 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Financial Instruments Disclosure [Text Block]	9. The following is a summary of the Company’s cash, cash equivalents and debt investments (in thousands): September 30, December 31, 2022 2021 Cash $ 245,051 $ 174,937 Money market funds 71,159 14,328 Certificates of deposit 126,532 141,478 Corporate debt securities 286,065 386,883 U.S. treasuries and government agency bonds 7,240 7,456 Auction-rate securities backed by student-loan notes 2,083 2,401 Total $ 738,130 $ 727,483 September 30, December 31, 2022 2021 Reported as: Cash and cash equivalents $ 316,210 $ 189,265 Short-term investments 419,837 535,817 Investment within other long-term assets 2,083 2,401 Total $ 738,130 $ 727,483 The following table summarizes the contractual maturities of the short-term and long-term available-for-sale investments as of September 30, 2022 ( Amortized Cost Fair Value Due in less than 1 year $ 316,904 $ 313,134 Due in 1 - 5 years 113,002 106,703 Due in greater than 5 years 2,195 2,083 Total $ 432,101 $ 421,920 Gross realized gains and losses recognized on the sales of available-for-sale investments were not The following tables summarize the unrealized gain and loss positions related to the available-for sale investments (in thousands): September 30, 2022 Amortized Cost Unrealized Gains Unrealized Losses Fair Value Money market funds $ 71,159 $ - $ - $ 71,159 Certificates of deposit 126,532 - - 126,532 Corporate debt securities 295,877 - (9,812 ) 286,065 U.S. treasuries and government agency bonds 7,497 - (257 ) 7,240 Auction-rate securities backed by student-loan notes 2,195 - (112 ) 2,083 Total $ 503,260 $ - $ (10,181 ) $ 493,079 December 31, 2021 Amortized Cost Unrealized Gains Unrealized Losses Fair Value Money market funds $ 14,328 $ - $ - $ 14,328 Certificates of deposit 141,478 - - 141,478 Corporate debt securities 388,081 570 (1,768 ) 386,883 U.S. treasuries and government agency bonds 7,495 - (39 ) 7,456 Auction-rate securities backed by student-loan notes 2,520 - (119 ) 2,401 Total $ 553,902 $ 570 $ (1,926 ) $ 552,546 The following tables present information about the available-for-sale investments that had been in a continuous unrealized loss position for less than 12 12 September 30, 2022 Less than 12 Months Greater than 12 Months Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Corporate debt securities $ 203,576 $ (6,236 ) $ 81,489 $ (3,576 ) $ 285,065 $ (9,812 ) U.S. treasuries and government agency bonds 3,361 (136 ) 3,879 (121 ) 7,240 (257 ) Auction-rate securities backed by student-loan notes - - 2,083 (112 ) 2,083 (112 ) Total $ 206,937 $ (6,372 ) $ 87,451 $ (3,809 ) $ 294,388 $ (10,181 ) December 31, 2021 Less than 12 Months Greater than 12 Months Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Corporate debt securities $ 285,954 $ (1,765 ) $ 4,760 $ (3 ) $ 290,714 $ (1,768 ) U.S. treasuries and government agency bonds 7,456 (39 ) - - 7,456 (39 ) Auction-rate securities backed by student-loan notes - - 2,401 (119 ) 2,401 (119 ) Total $ 293,410 $ (1,804 ) $ 7,161 $ (122 ) $ 300,571 $ (1,926 ) An impairment exists when the fair value of an investment is less than its amortized cost basis. As of September 30, 2022 December 31, 2021, not one not The Company’s auction-rate securities are backed by pools of student loans supported by guarantees by the U.S. Department of Education. The underlying maturities of these securities are up to 24 not not not Non-Marketable Equity Investment In November 2020 , April 2022, September 30, 2022 December 31, 2021 , not three nine September 30, 2022 . Restricted Cash The following table provides a reconciliation of cash, cash equivalents and restricted cash reported on the Condensed Consolidated Balance Sheets to the amounts reported on the Condensed Consolidated Statements of Cash Flows (in thousands): September 30, December 31, 2022 2021 Cash and cash equivalents $ 316,210 $ 189,265 Restricted cash included in other long-term assets 115 124 Total cash, cash equivalents and restricted cash reported on the Consolidated Statements of Cash Flows $ 316,325 $ 189,389 As of September 30, 2022 December 31, 2021 ,

Note 10 - Fair Value Measuremen

Note 10 - Fair Value Measurements	9 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Fair Value Disclosures [Text Block]	10. The following tables summarize the fair value of the financial assets measured on a recurring basis (in thousands): September 30, 2022 Total Level 1 Level 2 Level 3 Money market funds $ 71,159 $ 71,159 $ - $ - Certificates of deposit 126,532 - 126,532 - Corporate debt securities 286,065 - 286,065 - U.S. treasuries and government agency bonds 7,240 - 7,240 - Auction-rate securities backed by student-loan notes 2,083 - - 2,083 Mutual funds and money market funds under deferred compensation plan 29,140 29,140 - - Total $ 522,219 $ 100,299 $ 419,837 $ 2,083 December 31, 2021 Total Level 1 Level 2 Level 3 Money market funds $ 14,328 $ 14,328 $ - $ - Certificates of deposit 141,478 - 141,478 - Corporate debt securities 386,883 - 386,883 - U.S. treasuries and government agency bonds 7,456 - 7,456 - Auction-rate securities backed by student-loan notes 2,401 - - 2,401 Mutual funds and money market funds under deferred compensation plan 31,786 31,786 - - Total $ 584,332 $ 46,114 $ 535,817 $ 2,401 ● Level 1 ● Level 2 may third ● Level 3 Redemptions and changes in the fair value of the auction-rate securities classified as Level 3 not

Note 11 - Deferred Compensation

Note 11 - Deferred Compensation Plan	9 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Compensation and Employee Benefit Plans [Text Block]	11. The following table summarizes the deferred compensation plan balances on the Condensed Consolidated Balance Sheets (in thousands): September 30, December 31, 2022 2021 Deferred compensation plan asset components: Cash surrender value of corporate-owned life insurance policies $ 18,376 $ 21,386 Fair value of mutual funds and money market funds 29,140 31,786 Total $ 47,516 $ 53,172 Deferred compensation plan assets reported in: Other long-term assets $ 47,516 $ 53,172 Deferred compensation plan liabilities reported in: Accrued compensation and related benefits (short-term) $ 118 $ 282 Other long-term liabilities 49,417 55,489 Total $ 49,535 $ 55,771

Note 12 - Other Income (Expense

Note 12 - Other Income (Expense), Net	9 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Other Nonoperating Income and Expense [Text Block]	12. The components of other income (expense), net, are as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Interest income $ 3,584 $ 3,050 $ 10,378 $ 8,102 Amortization of premium on available-for-sale securities (1,102 ) (1,305 ) (3,682 ) (3,231 ) Gain (loss) on deferred compensation plan investments (1,330 ) (399 ) (8,607 ) 2,640 Foreign currency exchange gain (loss) 612 (171 ) 962 (544 ) Charitable contributions (1,700 ) (400 ) (4,700 ) (600 ) Other (59 ) 18 (71 ) 44 Total $ 5 $ 793 $ (5,720 ) $ 6,411

Note 13 - Income Taxes

Note 13 - Income Taxes	9 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Income Tax Disclosure [Text Block]	13. The income tax provision or benefit for interim periods is generally determined using an estimate of the Company’s annual effective tax rate and adjusted for discrete items, if any, in the relevant period. Each quarter the estimate of the annual effective tax rate is updated, and if the Company’s estimated tax rate changes, a cumulative adjustment is made. The income tax expense for the three September 30, 2022 nine September 30, 2022 The income tax expense for the three September 30, 2021 nine September 30, 2021 The Company’s uncertain tax positions relate to the allocation of income and deductions among its global entities and to the determination of the research and development tax credit. It is reasonably possible that the balance of gross unrecognized tax benefits could significantly change in the next 12 not On August 9, 2022, 2022 August 16, 2022, 2022 15% 1% January 1, 2023. not December 31, 2022.

Note 14 - Accumulated Other Com

Note 14 - Accumulated Other Comprehensive Income	9 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Comprehensive Income (Loss) Note [Text Block]	14. INCOME (LOSS) The following table summarizes the changes in accumulated other comprehensive income (loss) (in thousands): Unrealized Losses on Available-for-Sale Securities Foreign Currency Translation Adjustments Total Balance as of January 1, 2022 $ (1,063 ) $ 16,943 $ 15,880 Other comprehensive loss before reclassifications (5,970 ) (178 ) (6,148 ) Amounts reclassified from accumulated other comprehensive income 5 - 5 Tax effect 565 - 565 Net current period other comprehensive loss (5,400 ) (178 ) (5,578 ) Balance as of March 31, 2022 (6,463 ) 16,765 10,302 Other comprehensive loss before reclassifications (1,582 ) (23,585 ) (25,167 ) Amounts reclassified from accumulated other comprehensive loss 9 - 9 Tax effect 170 - 170 Net current period other comprehensive loss (1,403 ) (23,585 ) (24,988 ) Balance as of June 30, 2022 (7,866 ) (6,820 ) (14,686 ) Other comprehensive loss before reclassifications (1,369 ) (26,081 ) (27,450 ) Amounts reclassified from accumulated other comprehensive loss 82 - 82 Tax effect 130 - 130 Net current period other comprehensive loss (1,157 ) (26,081 ) (27,238 ) Balance as of September 30, 2022 $ (9,023 ) $ (32,901 ) $ (41,924 ) The amounts reclassified from accumulated other comprehensive income (loss) were recorded in other income (expense), net, on the Condensed Consolidated Statements of Operations.

Note 15 - Dividends and Dividen

Note 15 - Dividends and Dividend Equivalents	9 Months Ended
	Sep. 30, 2022
Notes to Financial Statements
Dividends And Dividend Equivalents [Text Block]	15. Cash Dividend Program The Company has a dividend program approved by the Board of Directors, pursuant to which the Company intends to pay quarterly cash dividends on its common stock. Based on the Company’s historical practice, stockholders of record as of the last business day of the quarter are entitled to receive the quarterly cash dividends when and if declared by the Board of Directors, which are payable to the stockholders in the following month. The Board of Directors declared the following cash dividends (in thousands, except per-share amounts): Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Dividend declared per share $ 0.75 $ 0.60 $ 2.25 $ 1.80 Total amount $ 35,145 $ 27,606 $ 105,082 $ 82,501 As of September 30, 2022 December 31, 2021, The declaration of any future cash dividends is at the discretion of the Board of Directors and will depend on, among other things, the Company’s financial condition, results of operations, capital requirements, business conditions, and other factors that the Board of Directors may The Company anticipates that cash used for future dividend payments will come from its domestic cash, cash generated from ongoing U.S. operations, and cash repatriated from its Bermuda subsidiary. The Company also anticipates that earnings from other foreign subsidiaries will continue to be indefinitely reinvested. Cash Dividend Equivalent Rights The Company’s RSUs contain rights to receive cash dividend equivalents, which entitle employees who hold RSUs to the same dividend value per share as holders of common stock. The dividend equivalents are accumulated and paid to the employees when the underlying RSUs vest. Dividend equivalents accumulated on the underlying RSUs are forfeited if the employees do not not September 30, 2022 December 31, 2021 ,

Note 3 - Stock-based Compensa_2

Note 3 - Stock-based Compensation (Tables)	9 Months Ended
	Sep. 30, 2022
Notes Tables
Share-Based Payment Arrangement, Cost by Plan [Table Text Block]	Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Cost of revenue $ 1,186 $ 922 $ 3,691 $ 2,622 Research and development 9,287 6,646 26,875 19,564 Selling, general and administrative 32,524 24,004 95,157 70,096 Total stock-based compensation expense $ 42,997 $ 31,572 $ 125,723 $ 92,282 Tax benefit related to stock-based compensation (1) $ 654 $ 488 $ 1,879 $ 1,299
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]	Time-Based RSUs PSUs and MPSUs MSUs Total Number of Shares Weighted-Average Grant Date Fair Value Per Share Number of Shares Weighted-Average Grant Date Fair Value Per Share Number of Shares Weighted-Average Grant Date Fair Value Per Share Number of Shares Weighted-Average Grant Date Fair Value Per Share Outstanding at January 1, 2022 125 $ 235.82 1,166 $ 222.78 1,218 $ 44.59 2,509 $ 136.87 Granted 44 $ 396.77 442 (1) $ 363.74 120 $ 270.15 606 $ 347.57 Vested (53 ) $ 188.73 (375 ) $ 141.02 (243 ) $ 23.57 (671 ) $ 102.22 Forfeited (6 ) $ 308.76 (1 ) $ 374.87 (6 ) $ 216.37 (13 ) $ 268.11 Outstanding at September 30, 2022 110 $ 318.11 1,232 $ 298.24 1,089 $ 73.23 2,431 $ 198.26
Schedule of Share-Based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]	Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Expected term (in years) 0.5 0.5 0.5 0.5 Expected volatility 63.2 % 43.0 % 50.6 % 43.2 % Risk-free interest rate 3.1 % 0.1 % 1.9 % 0.1 % Dividend yield 0.6 % 0.5 % 0.6 % 0.6 %

Note 4 - Balance Sheet Compon_2

Note 4 - Balance Sheet Components (Tables)	9 Months Ended
	Sep. 30, 2022
Notes Tables
Schedule of Inventory, Current [Table Text Block]	September 30, December 31, 2022 2021 Raw materials $ 83,313 $ 29,478 Work in process 155,904 130,029 Finished goods 158,218 99,910 Total $ 397,435 $ 259,417
Schedule of Other Current Assets [Table Text Block]	September 30, December 31, 2022 2021 RSU tax withholding proceeds receivable $ 11,957 $ 16,224 Prepaid expenses 9,197 9,526 Accrued interest receivable 7,676 5,440 Assets for product returns 4,969 1,596 Other 2,772 2,754 Total $ 36,571 $ 35,540
Schedule of Other Assets, Noncurrent [Table Text Block]	September 30, December 31, 2022 2021 Deferred compensation plan assets $ 47,516 $ 53,172 Prepaid expenses 173,229 2,311 Other 13,420 14,040 Total $ 234,165 $ 69,523
Schedule of Accrued Liabilities [Table Text Block]	September 30, December 31, 2022 2021 Dividends and dividend equivalents $ 40,823 $ 32,364 Warranty 22,644 20,989 Stock rotation and sales returns 22,757 5,748 Customer prepayments 3,417 4,300 Income tax payable 8,296 4,921 Other 11,125 12,960 Total $ 109,062 $ 81,282
Other Noncurrent Liabilities [Table Text Block]	September 30, December 31, 2022 2021 Deferred compensation plan liabilities $ 49,417 $ 55,489 Dividend equivalents 8,267 8,470 Other 1,877 3,268 Total $ 59,561 $ 67,227

Note 5 - Leases (Tables)

Note 5 - Leases (Tables)	9 Months Ended
	Sep. 30, 2022
Notes Tables
Lessee, Operating Lease, Balance Sheet Information [Table Text Block]	September 30, December 31, Financial Statement Line Item 2022 2021 Operating lease ROU assets Other long-term assets $ 4,617 $ 6,297 Operating lease liabilities Other accrued liabilities $ 2,263 $ 2,539 Other long-term liabilities $ 1,877 $ 3,268
Lease, Cost [Table Text Block]	Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Lease costs: Operating lease costs $ 656 $ 623 $ 2,061 $ 1,694 Other 454 140 1,259 387 Total lease costs $ 1,110 $ 763 $ 3,320 $ 2,081 Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 649 $ 612 $ 2,115 $ 1,622 ROU assets obtained in exchange for new operating lease liabilities $ 13 $ 793 $ 1,071 $ 4,477 September 30, December 31, 2022 2021 Weighted-average remaining lease term (in years) 2.3 2.8 Weighted-average discount rate 2.0 % 2.0 %
Lessee, Operating Lease, Liability, Maturity [Table Text Block]	2022 (remaining three months) $ 674 2023 1,999 2024 967 2025 590 2026 7 Total remaining lease payments 4,237 Less: imputed interest (97 ) Total lease liabilities $ 4,140
Lessor, Operating Lease, Payment to be Received, Fiscal Year Maturity [Table Text Block]	2022 (remaining three months) $ 554 2023 1,557 2024 607 2025 102 2026 18 Total $ 2,838

Note 6 - Net Income Per Share (

Note 6 - Net Income Per Share (Tables)	9 Months Ended
	Sep. 30, 2022
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Numerator: Net income $ 124,337 $ 68,770 $ 318,582 $ 169,352 Denominator: Weighted-average outstanding shares - basic 46,829 45,970 46,643 45,754 Effect of dilutive securities 1,520 1,882 1,652 2,018 Weighted-average outstanding shares - diluted 48,349 47,852 48,295 47,772 Net income per share: Basic $ 2.66 $ 1.50 $ 6.83 $ 3.70 Diluted $ 2.57 $ 1.44 $ 6.60 $ 3.55

Note 7 - Segment, Significant_2

Note 7 - Segment, Significant Customers and Geographic Information (Tables)	9 Months Ended
	Sep. 30, 2022
Notes Tables
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]	Three Months Ended September 30, Nine Months Ended September 30, Customer 2022 2021 2022 2021 Distributor A 25 % 24 % 24 % 26 % Distributor B 18 % 15 % 18 % 16 % Distributor C 10 % 12 % 11 % * September 30, December 31, 2022 2021 Distributor A 27 % 26 % Distributor B 18 % 17 % Value-added reseller A * 12 %
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]	Three Months Ended September 30, Nine Months Ended September 30, Country or Region 2022 2021 2022 2021 China $ 265,053 $ 184,796 $ 720,911 $ 509,072 Taiwan 58,920 47,048 185,025 125,756 Europe 44,885 21,328 101,279 62,498 South Korea 52,613 24,442 136,031 62,721 Southeast Asia 26,458 14,820 64,460 38,506 Japan 22,399 20,944 63,690 47,546 United States 24,965 10,091 62,384 24,935 Other 125 53 356 260 Total $ 495,418 $ 323,522 $ 1,334,136 $ 871,294
Revenue from External Customers by Products and Services [Table Text Block]	Three Months Ended September 30, Nine Months Ended September 30, Product Family 2022 2021 2022 2021 Direct Current (“DC”) to DC $ 462,982 $ 307,368 $ 1,264,081 $ 827,605 Lighting Control 32,436 16,154 70,055 43,689 Total $ 495,418 $ 323,522 $ 1,334,136 $ 871,294
Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block]	September 30, December 31, Country 2022 2021 China $ 194,811 $ 211,973 United States 112,982 113,805 Taiwan 18,787 19,607 Other 16,543 17,577 Total $ 343,123 $ 362,962

Note 8 - Commitments and Cont_2

Note 8 - Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2022
Notes Tables
Schedule of Product Warranty Liability [Table Text Block]	Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Balance at beginning of period $ 25,209 $ 10,873 $ 20,989 $ 6,895 Warranty provision for product sales 1,141 7,757 11,531 12,954 Settlements made (306 ) (770 ) (1,825 ) (1,739 ) Unused warranty provision (3,400 ) (84 ) (8,051 ) (334 ) Balance at end of period $ 22,644 $ 17,776 $ 22,644 $ 17,776
Contractual Obligation, Fiscal Year Maturity [Table Text Block]	2022 (remaining three months) $ 303,070 2023 420,883 2024 285,813 2025 353,952 Total $ 1,363,718

Note 9 - Cash, Cash Equivalen_2

Note 9 - Cash, Cash Equivalents, Investments and Restricted Cash (Tables)	9 Months Ended
	Sep. 30, 2022
Notes Tables
Fair Value, by Balance Sheet Grouping [Table Text Block]	September 30, December 31, 2022 2021 Cash $ 245,051 $ 174,937 Money market funds 71,159 14,328 Certificates of deposit 126,532 141,478 Corporate debt securities 286,065 386,883 U.S. treasuries and government agency bonds 7,240 7,456 Auction-rate securities backed by student-loan notes 2,083 2,401 Total $ 738,130 $ 727,483 September 30, December 31, 2022 2021 Reported as: Cash and cash equivalents $ 316,210 $ 189,265 Short-term investments 419,837 535,817 Investment within other long-term assets 2,083 2,401 Total $ 738,130 $ 727,483
Investments Classified by Contractual Maturity Date [Table Text Block]	Amortized Cost Fair Value Due in less than 1 year $ 316,904 $ 313,134 Due in 1 - 5 years 113,002 106,703 Due in greater than 5 years 2,195 2,083 Total $ 432,101 $ 421,920
Unrealized Gain (Loss) on Investments [Table Text Block]	September 30, 2022 Amortized Cost Unrealized Gains Unrealized Losses Fair Value Money market funds $ 71,159 $ - $ - $ 71,159 Certificates of deposit 126,532 - - 126,532 Corporate debt securities 295,877 - (9,812 ) 286,065 U.S. treasuries and government agency bonds 7,497 - (257 ) 7,240 Auction-rate securities backed by student-loan notes 2,195 - (112 ) 2,083 Total $ 503,260 $ - $ (10,181 ) $ 493,079 December 31, 2021 Amortized Cost Unrealized Gains Unrealized Losses Fair Value Money market funds $ 14,328 $ - $ - $ 14,328 Certificates of deposit 141,478 - - 141,478 Corporate debt securities 388,081 570 (1,768 ) 386,883 U.S. treasuries and government agency bonds 7,495 - (39 ) 7,456 Auction-rate securities backed by student-loan notes 2,520 - (119 ) 2,401 Total $ 553,902 $ 570 $ (1,926 ) $ 552,546
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block]	September 30, 2022 Less than 12 Months Greater than 12 Months Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Corporate debt securities $ 203,576 $ (6,236 ) $ 81,489 $ (3,576 ) $ 285,065 $ (9,812 ) U.S. treasuries and government agency bonds 3,361 (136 ) 3,879 (121 ) 7,240 (257 ) Auction-rate securities backed by student-loan notes - - 2,083 (112 ) 2,083 (112 ) Total $ 206,937 $ (6,372 ) $ 87,451 $ (3,809 ) $ 294,388 $ (10,181 ) December 31, 2021 Less than 12 Months Greater than 12 Months Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Corporate debt securities $ 285,954 $ (1,765 ) $ 4,760 $ (3 ) $ 290,714 $ (1,768 ) U.S. treasuries and government agency bonds 7,456 (39 ) - - 7,456 (39 ) Auction-rate securities backed by student-loan notes - - 2,401 (119 ) 2,401 (119 ) Total $ 293,410 $ (1,804 ) $ 7,161 $ (122 ) $ 300,571 $ (1,926 )
Restrictions on Cash and Cash Equivalents [Table Text Block]	September 30, December 31, 2022 2021 Cash and cash equivalents $ 316,210 $ 189,265 Restricted cash included in other long-term assets 115 124 Total cash, cash equivalents and restricted cash reported on the Consolidated Statements of Cash Flows $ 316,325 $ 189,389

Note 10 - Fair Value Measurem_2

Note 10 - Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2022
Notes Tables
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	September 30, 2022 Total Level 1 Level 2 Level 3 Money market funds $ 71,159 $ 71,159 $ - $ - Certificates of deposit 126,532 - 126,532 - Corporate debt securities 286,065 - 286,065 - U.S. treasuries and government agency bonds 7,240 - 7,240 - Auction-rate securities backed by student-loan notes 2,083 - - 2,083 Mutual funds and money market funds under deferred compensation plan 29,140 29,140 - - Total $ 522,219 $ 100,299 $ 419,837 $ 2,083 December 31, 2021 Total Level 1 Level 2 Level 3 Money market funds $ 14,328 $ 14,328 $ - $ - Certificates of deposit 141,478 - 141,478 - Corporate debt securities 386,883 - 386,883 - U.S. treasuries and government agency bonds 7,456 - 7,456 - Auction-rate securities backed by student-loan notes 2,401 - - 2,401 Mutual funds and money market funds under deferred compensation plan 31,786 31,786 - - Total $ 584,332 $ 46,114 $ 535,817 $ 2,401

Note 11 - Deferred Compensati_2

Note 11 - Deferred Compensation Plan (Tables)	9 Months Ended
	Sep. 30, 2022
Notes Tables
Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-Based Payments and Postretirement Benefits by Title of Individual and Type of Deferred Compensation [Table Text Block]	September 30, December 31, 2022 2021 Deferred compensation plan asset components: Cash surrender value of corporate-owned life insurance policies $ 18,376 $ 21,386 Fair value of mutual funds and money market funds 29,140 31,786 Total $ 47,516 $ 53,172 Deferred compensation plan assets reported in: Other long-term assets $ 47,516 $ 53,172 Deferred compensation plan liabilities reported in: Accrued compensation and related benefits (short-term) $ 118 $ 282 Other long-term liabilities 49,417 55,489 Total $ 49,535 $ 55,771

Note 12 - Other Income (Expen_2

Note 12 - Other Income (Expense), Net (Tables)	9 Months Ended
	Sep. 30, 2022
Notes Tables
Schedule of Other Nonoperating Income (Expense) [Table Text Block]	Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Interest income $ 3,584 $ 3,050 $ 10,378 $ 8,102 Amortization of premium on available-for-sale securities (1,102 ) (1,305 ) (3,682 ) (3,231 ) Gain (loss) on deferred compensation plan investments (1,330 ) (399 ) (8,607 ) 2,640 Foreign currency exchange gain (loss) 612 (171 ) 962 (544 ) Charitable contributions (1,700 ) (400 ) (4,700 ) (600 ) Other (59 ) 18 (71 ) 44 Total $ 5 $ 793 $ (5,720 ) $ 6,411

Note 14 - Accumulated Other C_2

Note 14 - Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2022
Notes Tables
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	Unrealized Losses on Available-for-Sale Securities Foreign Currency Translation Adjustments Total Balance as of January 1, 2022 $ (1,063 ) $ 16,943 $ 15,880 Other comprehensive loss before reclassifications (5,970 ) (178 ) (6,148 ) Amounts reclassified from accumulated other comprehensive income 5 - 5 Tax effect 565 - 565 Net current period other comprehensive loss (5,400 ) (178 ) (5,578 ) Balance as of March 31, 2022 (6,463 ) 16,765 10,302 Other comprehensive loss before reclassifications (1,582 ) (23,585 ) (25,167 ) Amounts reclassified from accumulated other comprehensive loss 9 - 9 Tax effect 170 - 170 Net current period other comprehensive loss (1,403 ) (23,585 ) (24,988 ) Balance as of June 30, 2022 (7,866 ) (6,820 ) (14,686 ) Other comprehensive loss before reclassifications (1,369 ) (26,081 ) (27,450 ) Amounts reclassified from accumulated other comprehensive loss 82 - 82 Tax effect 130 - 130 Net current period other comprehensive loss (1,157 ) (26,081 ) (27,238 ) Balance as of September 30, 2022 $ (9,023 ) $ (32,901 ) $ (41,924 )

Note 15 - Dividends and Divid_2

Note 15 - Dividends and Dividend Equivalents (Tables)	9 Months Ended
	Sep. 30, 2022
Notes Tables
Dividends Declared [Table Text Block]	Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Dividend declared per share $ 0.75 $ 0.60 $ 2.25 $ 1.80 Total amount $ 35,145 $ 27,606 $ 105,082 $ 82,501

Note 2 - Revenue Recognition (D

Note 2 - Revenue Recognition (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Lapse Period for Consignment (Day)				60 days
Accounts Receivable, after Allowance for Credit Loss, Current, Total	$ 153,404			$ 153,404		$ 104,813
Contract with Customer, Liability, Current	3,417			3,417		4,300
Contract with Customer, Liability, Revenue Recognized				$ 4,100
Minimum [Member]
Contract with Customer, Payment Term (Day)			30 days
Maximum [Member]
Contract with Customer, Payment Term (Day)			90 days
Certain Customers in China [Member]
Contract with Customer, Payment Term Required Prior to Shipping Products (Week)				14 days
Certain Customers in China [Member] | Accrued Liabilities, Current [Member]
Contract with Customer, Liability, Current	$ 3,400			$ 3,400		$ 4,300
Product [Member]
Percentage of Revenue	98%	96%		98%	96%
Product Sales Through Distribution Arrangements [Member] | Customer Concentration Risk [Member] | Revenue Benchmark [Member]
Concentration Risk, Percentage	83%	89%		83%	89%

Note 3 - Stock-based Compensa_3

Note 3 - Stock-based Compensation (Details Textual) $ / shares in Units, $ in Thousands		1 Months Ended	3 Months Ended			9 Months Ended
	Jun. 11, 2020 shares	Feb. 28, 2022 USD ($) $ / shares shares	Sep. 30, 2022 USD ($) $ / shares shares	Mar. 31, 2022	Sep. 30, 2021 USD ($) shares	Sep. 30, 2022 USD ($) $ / shares shares	Sep. 30, 2021 USD ($) shares	Nov. 13, 2014 shares
Share Price (in dollars per share) | $ / shares		$ 393.16	$ 363.40			$ 363.40
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total			$ 1,100			$ 1,100
Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Excluding Option Exercised						$ 4,345	$ 15,147
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | shares						606,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares						$ 347.57
Proceeds from Stock Plans						$ 5,877	4,670
Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested			62,300		$ 76,800	277,900	297,700
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding			881,100			881,100
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total			$ 239,300			$ 239,300
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)						2 years
Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Excluding Option Exercised						$ 4,300	$ 15,100
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | shares						44,000
Time-Based RSUs [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | shares						44,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares						$ 396.77
Time-Based RSUs [Member] | Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)						4 years
Time-Based RSUs [Member] | Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)		1 year				1 year
PSU 2022 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Price Per Share Payable Upon Vesting of Equity Instruments Other than Options (in dollars per share) | $ / shares		$ 30
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares		$ 393.16
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year)		4 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate		44.60%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate		1.50%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate		0.80%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Discount for Postvesting Restrictions		10.30%
PSU 2022 [Member] | Executive Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | shares		81,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Percentage Allowed		300%
Maximum Stock Compensation Costs		$ 145,700
PSU 2022 [Member] | Executive Officer [Member] | Vesting First Quarter of 2023 if Performance Conditions are Met [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage		50%
PSU 2022 [Member] | Non-Executive Employees [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | shares		14,000
Share-based Compensation Arrangement by Share-based Payment Award, Vesting, Measurement Period of Relative Revenue Growth Rate to Industry Average (Year)				2 years
Maximum Stock Compensation Costs		$ 13,700
PSU 2022 [Member] | Non-Executive Employees [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Minimum Percentage Allowed		200%
PSU 2020 [Member] | Non-Executive Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Vesting, Measurement Period of Relative Revenue Growth Rate to Industry Average (Year)		2 years
PSU 2020 [Member] | Non-Executive Employees [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Minimum Percentage Allowed		200%
PSU 2020 [Member] | Non-Executive Employees [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Percentage Allowed		300%
PSU 2020 [Member] | Non-Executive Employees [Member] | Vesting First Quarter of 2021 if Performance Conditions are Met [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage		50%
PSU 2020 [Member] | Non-Executive Employees [Member] | Annual or Quarterly Vesting of Awards Not Based on Performance [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)		2 years
MSUs 2022 [Member]
Share Price (in dollars per share) | $ / shares		$ 393.16
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Percentage Allowed		500%
Maximum Stock Compensation Costs		$ 31,300
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate		39%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate		1.70%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate		0.80%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Price Targets		5
Total number of performance conditions		6
MSUs 2022 [Member] | Minimum [Member]
Market Awards Price Targets (in dollars per share) | $ / shares		$ 472
MSUs 2022 [Member] | Maximum [Member]
Market Awards Price Targets (in dollars per share) | $ / shares		$ 590
MSUs 2022 [Member] | Executive Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | shares		24,000
The2014 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares) | shares								5,500,000
Amended and Restated 2014 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized (in shares) | shares	10,500,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) | shares			5,000,000			5,000,000
The 2004 Employee Stock Purchase Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) | shares			4,500,000			4,500,000
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares) | shares			7,000		7,000	14,000	17,000
Employee Stock Purchase Plan Shares Issued, Intrinsic Value			$ 900		$ 1,000	$ 1,600	$ 2,400
Proceeds from Stock Plans						$ 5,900	$ 4,700

Note 3 - Stock-based Compensa_4

Note 3 - Stock-based Compensation - Stock-based Compensation Plan Expenses (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Share based compensation expense		$ 42,997	$ 31,572	$ 125,723	$ 92,282
Tax benefit related to stock-based compensation	[1]	654	488	1,879	1,299
Cost of Sales [Member]
Share based compensation expense		1,186	922	3,691	2,622
Research and Development Expense [Member]
Share based compensation expense		9,287	6,646	26,875	19,564
Selling, General and Administrative Expenses [Member]
Share based compensation expense		$ 32,524	$ 24,004	$ 95,157	$ 70,096
[1]Amount reflects the tax benefit related to stock-based compensation recorded for equity awards that are expected to generate tax deductions when they vest in future periods. Equity awards granted to the Company’s executive officers are subject to the tax deduction limitations set by Section 162(m) of the Internal Revenue Code.

Note 3 - Stock-based Compensa_5

Note 3 - Stock-based Compensation - RSU Summary (Details) shares in Thousands	9 Months Ended
	Sep. 30, 2022 $ / shares shares
Balance (in shares) | shares	2,509
Weighted-Average Grant Date Fair Value Per Share, ending balance (in dollars per share)	$ 136.87
Granted (in shares) | shares	606
Weighted-Average Grant Date Fair Value Per Share, granted (in dollars per share)	$ 347.57
Vested (in shares) | shares	(671)
Weighted-Average Grant Date Fair Value Per Share, vested (in dollars per share)	$ 102.22
Weighted-Average Grant Date Fair Value Per Share, vested (in dollars per share)	$ (102.22)
Forfeited (in shares) | shares	(13)
Weighted-Average Grant Date Fair Value Per Share, forfeited (in dollars per share)	$ 268.11
Balance (in shares) | shares	2,431
Weighted-Average Grant Date Fair Value Per Share, ending balance (in dollars per share)	$ 198.26
Time-Based RSUs [Member]
Balance (in shares) | shares	125
Weighted-Average Grant Date Fair Value Per Share, ending balance (in dollars per share)	$ 235.82
Granted (in shares) | shares	44
Weighted-Average Grant Date Fair Value Per Share, granted (in dollars per share)	$ 396.77
Vested (in shares) | shares	(53)
Weighted-Average Grant Date Fair Value Per Share, vested (in dollars per share)	$ 188.73
Weighted-Average Grant Date Fair Value Per Share, vested (in dollars per share)	$ (188.73)
Forfeited (in shares) | shares	(6)
Weighted-Average Grant Date Fair Value Per Share, forfeited (in dollars per share)	$ 308.76
Balance (in shares) | shares	110
Weighted-Average Grant Date Fair Value Per Share, ending balance (in dollars per share)	$ 318.11
PSUs and MPSUs [Member]
Balance (in shares) | shares	1,166
Weighted-Average Grant Date Fair Value Per Share, ending balance (in dollars per share)	$ 222.78
Granted (in shares) | shares	442	[1]
Weighted-Average Grant Date Fair Value Per Share, granted (in dollars per share)	$ 363.74
Vested (in shares) | shares	(375)
Weighted-Average Grant Date Fair Value Per Share, vested (in dollars per share)	$ 141.02
Weighted-Average Grant Date Fair Value Per Share, vested (in dollars per share)	$ (141.02)
Forfeited (in shares) | shares	(1)
Weighted-Average Grant Date Fair Value Per Share, forfeited (in dollars per share)	$ 374.87
Balance (in shares) | shares	1,232
Weighted-Average Grant Date Fair Value Per Share, ending balance (in dollars per share)	$ 298.24
MSUs [Member]
Balance (in shares) | shares	1,218
Weighted-Average Grant Date Fair Value Per Share, ending balance (in dollars per share)	$ 44.59
Granted (in shares) | shares	120
Weighted-Average Grant Date Fair Value Per Share, granted (in dollars per share)	$ 270.15
Vested (in shares) | shares	(243)
Weighted-Average Grant Date Fair Value Per Share, vested (in dollars per share)	$ 23.57
Weighted-Average Grant Date Fair Value Per Share, vested (in dollars per share)	$ (23.57)
Forfeited (in shares) | shares	(6)
Weighted-Average Grant Date Fair Value Per Share, forfeited (in dollars per share)	$ 216.37
Balance (in shares) | shares	1,089
Weighted-Average Grant Date Fair Value Per Share, ending balance (in dollars per share)	$ 73.23
[1]Amount reflects the number of awards that may ultimately be earned based on management’s probability assessment of the achievement of performance conditions at each reporting period.

Note 3 - Stock-based Compensa_6

Note 3 - Stock-based Compensation - Valuation Assumptions (Details) - 2004 Employee Stock Plan [Member] - Employee Stock Purchase Plan [Member]	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Expected term (Year)	6 months	6 months	6 months	6 months
Expected volatility	63.20%	43%	50.60%	43.20%
Risk-free interest rate	3.10%	0.10%	1.90%	0.10%
Dividend yield	0.60%	0.50%	0.60%	0.60%

Note 4 - Balance Sheet Compon_3

Note 4 - Balance Sheet Components (Details Textual) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Prepaid Expenses, Deposit from Vendor	$ 170
Inventory, Stock Rotation Reserve	$ 22.4	$ 5.5

Note 4 - Balance Sheet Compon_4

Note 4 - Balance Sheet Components - Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Raw materials	$ 83,313	$ 29,478
Work in process	155,904	130,029
Finished goods	158,218	99,910
Total	$ 397,435	$ 259,417

Note 4 - Balance Sheet Compon_5

Note 4 - Balance Sheet Components - Other Current Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
RSU tax withholding proceeds receivable	$ 11,957	$ 16,224
Prepaid expenses	9,197	9,526
Accrued interest receivable	7,676	5,440
Assets for product returns	4,969	1,596
Other	2,772	2,754
Total	$ 36,571	$ 35,540

Note 4 - Balance Sheet Compon_6

Note 4 - Balance Sheet Components - Other Long-term Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Deferred compensation plan assets	$ 47,516	$ 53,172
Prepaid expenses	173,229	2,311
Other	13,420	14,040
Total	$ 234,165	$ 69,523

Note 4 - Balance Sheet Compon_7

Note 4 - Balance Sheet Components - Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Dividends and dividend equivalents	$ 40,823	$ 32,364
Warranty	22,644	20,989
Stock rotation and sales returns	22,757	5,748
Customer prepayments	3,417	4,300
Income tax payable	8,296	4,921
Other	11,125	12,960
Total	$ 109,062	$ 81,282

Note 4 - Balance Sheet Compon_8

Note 4 - Balance Sheet Components - Other Long-term Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Deferred compensation plan liabilities	$ 49,417	$ 55,489
Dividend equivalents	8,267	8,470
Other	1,877	3,268
Total	$ 59,561	$ 67,227

Note 5 - Leases (Details Textua

Note 5 - Leases (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Lessee, Operating Lease, Lease Not yet Commenced, Future Lease Obligations	$ 0		$ 0
Operating Lease, Lease Income, Lease Payments	$ 600	$ 700	$ 1,700	$ 1,700
Minimum [Member]
Lessor, Operating Lease, Remaining Lease Term (Year)			1 year
Maximum [Member]
Lessor, Operating Lease, Remaining Lease Term (Year)			4 years
Lessee, Operating Lease, Renewal Term (Year)	2 years		2 years
Lessor, Operating Lease, Renewal Term (Year)	5 years		5 years

Note 5 - Leases - Balance Sheet

Note 5 - Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Other Long-term Assets [Member]
Operating lease ROU assets	$ 4,617	$ 6,297
Other Accrued Liabilities [Member]
Operating lease liabilities	2,263	2,539
Other Long-term Liabilities [Member]
Operating Lease, Liability, Noncurrent	$ 1,877	$ 3,268

Note 5 - Leases - Leases Cost (

Note 5 - Leases - Leases Cost (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Operating lease costs		$ 656	$ 623	$ 2,061	$ 1,694
Other		454	140	1,259	387
Total lease costs		1,110	763	3,320	2,081
Operating cash flows from operating leases		649	612	2,115	1,622
ROU assets obtained in exchange for new operating lease liabilities	[1]	$ 13	$ 793	$ 1,071	$ 4,477
Weighted-average remaining lease term (in years) (Year)		2 years 3 months 18 days		2 years 3 months 18 days		2 years 9 months 18 days
Weighted-average discount rate		2%		2%		2%
[1]For the year ended December 31, 2019, the amount includes $2.3 million for operating leases existing on January 1, 2019, the adoption date of ASU No. 2016-02, Leases (Topic 842).

Note 5 - Leases - Maturities of

Note 5 - Leases - Maturities of Lease Liabilities (Details) $ in Thousands	Sep. 30, 2022 USD ($)
2022 (remaining three months)	$ 674
2023	1,999
2024	967
2025	590
2026	7
Total remaining lease payments	4,237
Less: imputed interest	(97)
Accrued Liabilities and Other Long-term Liabilities [Member]
Total lease liabilities	$ 4,140

Note 5 - Leases - Maturities _2

Note 5 - Leases - Maturities of Income Related to Lease Payments (Details) $ in Thousands	Sep. 30, 2022 USD ($)
2022 (remaining three months)	$ 554
2023	1,557
2024	607
2025	102
2026	18
Total	$ 2,838

Note 6 - Net Income Per Share -

Note 6 - Net Income Per Share - Net Income Per Share Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Net income	$ 124,337	$ 68,770	$ 318,582	$ 169,352
Weighted-average outstanding shares - basic (in shares)	46,829	45,970	46,643	45,754
Effect of dilutive securities (in shares)	1,520	1,882	1,652	2,018
Weighted-average outstanding shares - diluted (in shares)	48,349	47,852	48,295	47,772
Earnings per share, basic (in dollars per share)	$ 2.66	$ 1.50	$ 6.83	$ 3.70
Earnings per share, diluted (in dollars per share)	$ 2.57	$ 1.44	$ 6.60	$ 3.55

Note 7 - Segment, Significant_3

Note 7 - Segment, Significant Customers and Geographic Information (Details Textual)	9 Months Ended
	Sep. 30, 2022
Number of Reportable Segments	1

Note 7 - Segment, Significant_4

Note 7 - Segment, Significant Customers and Geographic Information - Customers with Sales and Accounts Receivable Greater Than 10% (Details) - Customer Concentration Risk [Member]	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Revenue Benchmark [Member] | Distributor A [Member]
Concentration risk	25%	24%	24%	26%
Revenue Benchmark [Member] | Distributor B [Member]
Concentration risk	18%	15%	18%	16%
Revenue Benchmark [Member] | Distributor C [Member]
Concentration risk	10%	12%	11%
Accounts Receivable [Member] | Distributor A [Member]
Concentration risk			27%		26%
Accounts Receivable [Member] | Distributor B [Member]
Concentration risk			18%		17%
Accounts Receivable [Member] | Value Added Reseller A [Member]
Concentration risk					12%

Note 7 - Segment, Significant_5

Note 7 - Segment, Significant Customers and Geographic Information - Revenue By Region (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue	$ 495,418	$ 323,522	$ 1,334,136	$ 871,294
CHINA
Revenue	265,053	184,796	720,911	509,072
TAIWAN
Revenue	58,920	47,048	185,025	125,756
Europe [Member]
Revenue	44,885	21,328	101,279	62,498
KOREA, REPUBLIC OF
Revenue	52,613	24,442	136,031	62,721
South East Asia [Member]
Revenue	26,458	14,820	64,460	38,506
JAPAN
Revenue	22,399	20,944	63,690	47,546
UNITED STATES
Revenue	24,965	10,091	62,384	24,935
Other Region [Member]
Revenue	$ 125	$ 53	$ 356	$ 260

Note 7 - Segment, Significant_6

Note 7 - Segment, Significant Customers and Geographic Information - Revenue By Product Family (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue	$ 495,418	$ 323,522	$ 1,334,136	$ 871,294
DC To DC Products [Member]
Revenue	462,982	307,368	1,264,081	827,605
Lighting Control Products [Member]
Revenue	$ 32,436	$ 16,154	$ 70,055	$ 43,689

Note 7- Segment, Significant Cu

Note 7- Segment, Significant Customers and Geographic Information - Long Lived Assets By Geographic Region (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Long lived assets by region	$ 343,123	$ 362,962
CHINA
Long lived assets by region	194,811	211,973
UNITED STATES
Long lived assets by region	112,982	113,805
TAIWAN
Long lived assets by region	18,787	19,607
Other Region [Member]
Long lived assets by region	$ 16,543	$ 17,577

Note 8 - Commitments and Cont_3

Note 8 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Standard Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties	$ (3,400)		$ 1,400	$ 1,900	$ 2,200
Purchase Obligation, Total	$ 1,363,718			$ 1,363,718
Long-term Supply Agreement [Member]
Purchase Obligation, Total			$ 170,000		$ 170,000
Minimum [Member]
Warranty Term (Year)		1 year
Maximum [Member]
Warranty Term (Year)		2 years

Note 8 - Commitments and Cont_4

Note 8 - Commitments and Contingencies - Changes in Warranty Reserve (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Balance	$ 25,209	$ 10,873	$ 20,989	$ 6,895
Warranty provision for product sales	1,141	7,757	11,531	12,954
Settlements made	(306)	(770)	(1,825)	(1,739)
Unused warranty provision	(3,400)	(84)	(8,051)	(334)
Balance	$ 22,644	$ 17,776	$ 22,644	$ 17,776

Note 8 - Commitments and Cont_5

Note 8 - Commitments and Contingencies - Estimated Future Unconditional Purchase Commitments (Details) $ in Thousands	Sep. 30, 2022 USD ($)
2022 (remaining three months)	$ 303,070
2023	420,883
2024	285,813
2025	353,952
Total	$ 1,363,718

Note 9 - Cash, Cash Equivalen_3

Note 9 - Cash, Cash Equivalents, Investments and Restricted Cash (Details Textual) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Other-than-temporary Impairment Loss, Debt Securities, Available-for-sale, Total	$ 0	$ 0
Redemption, Auction Rate Securities to Date	$ 41,100
Percentage of Auction Rate Securities Redeemed at Par Value	95%
Equity Securities without Readily Determinable Fair Value, Amount	$ 5,100	$ 3,300

Note 9 - Cash, Cash Equivalen_4

Note 9 - Cash, Cash Equivalents, Investments and Restricted Cash - Cash, Cash Equivalents, Short-term and Long-term Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Cash	$ 245,051	$ 174,937
Money market funds	71,159	14,328
Certificates of deposit	126,532	141,478
U.S. treasuries and government agency bonds	7,240	7,456
Total	738,130	727,483
Cash and cash equivalents	316,210	189,265
Short-term investments	419,837	535,817
Investment within other long-term assets	2,083	2,401
Corporate Debt Securities [Member]
Available-for-sale securities	286,065	386,883
Auction Rate Securities [Member]
Available-for-sale securities	$ 2,083	$ 2,401

Note 9 - Cash, Cash Equivalen_5

Note 9 - Cash, Cash Equivalents, Investments and Restricted Cash - Investment Maturity Classification (Details) $ in Thousands	Sep. 30, 2022 USD ($)
Due in less than 1 year, Amortized cost	$ 316,904
Due in less than 1 year, fair value	313,134
Due in 1 - 5 years, Amortized cost	113,002
Due in 1 - 5 years	106,703
Due in greater than 5 years, Amortized cost	2,195
Due in greater than 5 years	2,083
Total, Amortized cost	432,101
Total	$ 421,920

Note 9 - Cash, Cash Equivalen_6

Note 9 - Cash, Cash Equivalents, Investments and Restricted Cash - Unrealized Gains and Losses on Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Amortized Cost	$ 503,260	$ 553,902
Unrealized Gains	0	570
Unrealized Losses	(10,181)	(1,926)
Total Fair Value	493,079	552,546
Money Market Funds [Member]
Amortized Cost	71,159	14,328
Unrealized Gains	0	0
Unrealized Losses	0	0
Total Fair Value	71,159	14,328
Certificates of Deposit [Member]
Amortized Cost	126,532	141,478
Unrealized Gains	0	0
Unrealized Losses	0	0
Total Fair Value	126,532	141,478
Corporate Debt Securities [Member]
Amortized Cost	295,877	388,081
Unrealized Gains	0	570
Unrealized Losses	(9,812)	(1,768)
Total Fair Value	286,065	386,883
US Government Agencies Short-Term Debt Securities [Member]
Amortized Cost	7,497	7,495
Unrealized Gains	0	0
Unrealized Losses	(257)	(39)
Total Fair Value	7,240	7,456
Auction Rate Securities [Member]
Amortized Cost	2,195	2,520
Unrealized Gains	0	0
Unrealized Losses	(112)	(119)
Total Fair Value	$ 2,083	$ 2,401

Note 9 - Cash, Cash Equivalen_7

Note 9 - Cash, Cash Equivalents, Investments and Restricted Cash - Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Continuous Unrealized Loss Position, Less than 12 Months	$ 206,937	$ 293,410
Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(6,372)	(1,804)
Continuous Unrealized Loss Position, 12 Months or Longer	87,451	7,161
Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(3,809)	(122)
Unrealized Loss Position, Total	294,388	300,571
Unrealized Loss Position, Accumulated Loss, Total	(10,181)	(1,926)
Corporate Debt Securities [Member]
Continuous Unrealized Loss Position, Less than 12 Months	203,576	285,954
Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(6,236)	(1,765)
Continuous Unrealized Loss Position, 12 Months or Longer	81,489	4,760
Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(3,576)	(3)
Unrealized Loss Position, Total	285,065	290,714
Unrealized Loss Position, Accumulated Loss, Total	(9,812)	(1,768)
US Treasury and Government Short-Term Debt Securities [Member]
Continuous Unrealized Loss Position, Less than 12 Months	3,361
Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(136)
Continuous Unrealized Loss Position, 12 Months or Longer	3,879
Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(121)
Unrealized Loss Position, Total	7,240
Unrealized Loss Position, Accumulated Loss, Total	(257)
US Government Agencies Short-Term Debt Securities [Member]
Continuous Unrealized Loss Position, Less than 12 Months		7,456
Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(39)
Continuous Unrealized Loss Position, 12 Months or Longer		0
Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		0
Unrealized Loss Position, Total		7,456
Unrealized Loss Position, Accumulated Loss, Total		(39)
Auction Rate Securities [Member]
Continuous Unrealized Loss Position, Less than 12 Months	0	0
Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Continuous Unrealized Loss Position, 12 Months or Longer	2,083	2,401
Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(112)	(119)
Unrealized Loss Position, Total	2,083	2,401
Unrealized Loss Position, Accumulated Loss, Total	$ (112)	$ (119)

Note 9 - Cash, Cash Equivalen_8

Note 9 - Cash, Cash Equivalents, Investments and Restricted Cash - Restricted Cash (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Dec. 31, 2020
Cash and cash equivalents	$ 316,210	$ 189,265
Restricted cash included in other long-term assets	115	124
Total cash, cash equivalents and restricted cash reported on the Consolidated Statements of Cash Flows	$ 316,325	$ 189,389	$ 226,211	$ 335,071

Note 10 - Fair Value Measurem_3

Note 10 - Fair Value Measurements - Financial Assets and Liabilities, Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Total Fair Value	$ 493,079	$ 552,546
Assets, fair value	522,219	584,332
Fair Value, Inputs, Level 1 [Member]
Assets, fair value	100,299	46,114
Fair Value, Inputs, Level 2 [Member]
Assets, fair value	419,837	535,817
Fair Value, Inputs, Level 3 [Member]
Assets, fair value	2,083	2,401
Money Market Funds [Member]
Total Fair Value	71,159	14,328
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Total Fair Value	71,159	14,328
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Total Fair Value	0	0
Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Total Fair Value	0	0
Certificates of Deposit [Member]
Total Fair Value	126,532	141,478
Certificates of Deposit [Member] | Fair Value, Inputs, Level 1 [Member]
Total Fair Value	0	0
Certificates of Deposit [Member] | Fair Value, Inputs, Level 2 [Member]
Total Fair Value	126,532	141,478
Certificates of Deposit [Member] | Fair Value, Inputs, Level 3 [Member]
Total Fair Value	0	0
Corporate Debt Securities [Member]
Total Fair Value	286,065	386,883
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Total Fair Value	0	0
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Total Fair Value	286,065	386,883
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Total Fair Value	0	0
US Government Agencies Short-Term Debt Securities [Member]
Total Fair Value	7,240	7,456
US Government Agencies Short-Term Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Total Fair Value	0	0
US Government Agencies Short-Term Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Total Fair Value	7,240	7,456
US Government Agencies Short-Term Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Total Fair Value	0	0
Auction Rate Securities [Member]
Total Fair Value	2,083	2,401
Auction Rate Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Total Fair Value	0	0
Auction Rate Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Total Fair Value	0	0
Auction Rate Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Total Fair Value	2,083	2,401
Mutual Fund [Member]
Total Fair Value	29,140	31,786
Mutual Fund [Member] | Fair Value, Inputs, Level 1 [Member]
Total Fair Value	29,140	31,786
Mutual Fund [Member] | Fair Value, Inputs, Level 2 [Member]
Total Fair Value	0	0
Mutual Fund [Member] | Fair Value, Inputs, Level 3 [Member]
Total Fair Value	$ 0	$ 0

Note 11 - Deferred Compensati_3

Note 11 - Deferred Compensation Plan - Summary of Deferred Compensation Plan (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Deferred compensation plan assets	$ 47,516	$ 53,172
Deferred compensation plan liabilities	49,535	55,771
Other Long-term Assets [Member]
Deferred compensation plan assets	47,516	53,172
Accrued Compensation and Related Benefits [Member]
Deferred compensation plan liabilities	118	282
Other Long-term Liabilities [Member]
Deferred compensation plan liabilities	49,417	55,489
Cash Surrender Value [Member]
Deferred compensation plan assets	18,376	21,386
Mutual Funds and Money Market Funds, Fair Value [Member]
Deferred compensation plan assets	$ 29,140	$ 31,786

Note 12 - Other Income (Expen_3

Note 12 - Other Income (Expense), Net - Interest and Other Income Components (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Interest income	$ 3,584	$ 3,050	$ 10,378	$ 8,102
Amortization of premium on available-for-sale securities	(1,102)	(1,305)	(3,682)	(3,231)
Gain (loss) on deferred compensation plan investments	(1,330)	(399)	(8,607)	2,640
Foreign currency exchange gain (loss)	612	(171)	962	(544)
Charitable contributions	(1,700)	(400)	(4,700)	(600)
Other	(59)	18	(71)	44
Total	$ 5	$ 793	$ (5,720)	$ 6,411

Note 13 - Income Taxes (Details

Note 13 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Tax Expense (Benefit), Total	$ 27,539	$ 9,154	$ 65,591	$ 20,904
Effective Income Tax Rate Reconciliation, Percent, Total	18.10%	11.70%	17.10%	11%

Note 14 - Accumulated Other C_3

Note 14 - Accumulated Other Comprehensive Income - Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022
Balance	$ 1,423,122		$ 1,243,985
Balance	1,530,709	$ 1,423,122
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Balance	(7,866)	(6,463)	(1,063)
Other comprehensive loss before reclassifications	(1,369)	(1,582)	(5,970)
Amounts reclassified from accumulated other comprehensive income	82	9	5
Tax effect	130	170	565
Net current period other comprehensive loss	(1,157)	(1,403)	(5,400)
Balance	(9,023)	(7,866)	(6,463)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	(6,820)	16,765	16,943
Other comprehensive loss before reclassifications	(26,081)	(23,585)	(178)
Amounts reclassified from accumulated other comprehensive income	0	0	0
Tax effect	0	0	0
Net current period other comprehensive loss	(26,081)	(23,585)	(178)
Balance	(32,901)	(6,820)	16,765
AOCI Attributable to Parent [Member]
Balance	(14,686)	10,302	15,880
Other comprehensive loss before reclassifications	(27,450)	(25,167)	(6,148)
Amounts reclassified from accumulated other comprehensive income	82	9	5
Tax effect	130	170	565
Net current period other comprehensive loss	(27,238)	(24,988)	(5,578)
Balance	$ (41,924)	$ (14,686)	$ 10,302

Note 15 - Dividends and Divid_3

Note 15 - Dividends and Dividend Equivalents (Details Textual) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Dividends Payable, Current	$ 35.1	$ 27.7
Accrued Dividend Equivalents	$ 13.9	$ 13.1

Note 15 - Dividends and Divid_4

Note 15 - Dividends and Dividend Equivalents - Cash Dividends (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Dividend declared per share (in dollars per share)	$ 0.75	$ 0.60	$ 2.25	$ 1.80
Total amount	$ 35,145	$ 27,606	$ 105,082	$ 82,501