Align Technology (ALGN) 10-Q 5 May 23 2023 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Mar. 31, 2023	Apr. 28, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	000-32259
Entity Registrant Name	ALIGN TECHNOLOGY, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	94-3267295
Entity Address, Address Line One	410 North Scottsdale Road, Suite 1300
Entity Address, City or Town	Tempe
Entity Address, State or Province	AZ
Entity Address, Postal Zip Code	85288
City Area Code	602
Local Phone Number	742-2000
Title of 12(b) Security	Common Stock, $0.0001 par value
Trading Symbol	ALGN
Security Exchange Name	NASDAQ
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Shell Company	false
Entity Central Index Key	0001097149
Current Fiscal Year End Date	--12-31
Document Period End Date	Mar. 31, 2023
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		76,516,951

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Net revenues	$ 943,147	$ 973,219
Cost of net revenues	282,493	263,873
Gross profit	660,654	709,346
Operating expenses:
Selling, general and administrative	439,691	439,457
Research and development	87,447	71,807
Total operating expenses	527,138	511,264
Income from operations	133,516	198,082
Interest income	2,337	677
Other income (expense), net	(1,229)	(11,273)
Total interest income and other income (expense), net	1,108	(10,596)
Net income before provision for income taxes	134,624	187,486
Provision for income taxes	46,826	53,188
Net income	$ 87,798	$ 134,298
Net income per share:
Basic (in usd per share)	$ 1.14	$ 1.71
Diluted (in usd per share)	$ 1.14	$ 1.70
Shares used in computing net income per share:
Basic (in shares)	76,921	78,742
Diluted (in shares)	77,111	79,193

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 87,798	$ 134,298
Other comprehensive income (loss):
Change in foreign currency translation adjustment, net of tax	10,474	(7,311)
Change in unrealized gains (losses) on investments, net of tax	1,645	(2,728)
Other comprehensive income (loss)	12,119	(10,039)
Comprehensive income	$ 99,917	$ 124,259

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 832,383	$ 942,050
Marketable securities, short-term	51,644	57,534
Accounts receivable, net of allowance for doubtful accounts of $11,192 and $10,343, respectively	884,430	859,685
Inventories	311,885	338,752
Prepaid expenses and other current assets	251,540	226,370
Total current assets	2,331,882	2,424,391
Marketable securities, long-term	37,379	41,978
Property, plant and equipment, net	1,262,815	1,231,855
Operating lease right-of-use assets, net	117,889	118,880
Goodwill	414,222	407,551
Intangible assets, net	93,320	95,720
Deferred tax assets	1,589,640	1,571,746
Other assets	54,301	55,826
Total assets	5,901,448	5,947,947
Current liabilities:
Accounts payable	130,561	127,870
Accrued liabilities	497,248	454,374
Deferred revenues	1,376,789	1,343,643
Total current liabilities	2,004,598	1,925,887
Income tax payable	126,541	124,393
Operating lease liabilities	99,002	100,334
Other long-term liabilities	191,258	195,975
Total liabilities	2,421,399	2,346,589
Commitments and contingencies (Notes 6 and 7)
Stockholders’ equity:
Preferred stock, $0.0001 par value (5,000 shares authorized; none issued)	0	0
Common stock, $0.0001 par value (200,000 shares authorized; 76,516 and 77,267 issued and outstanding, respectively)	8	8
Additional paid-in capital	1,104,693	1,044,946
Accumulated other comprehensive income (loss), net	1,835	(10,284)
Retained earnings	2,373,513	2,566,688
Total stockholders’ equity	3,480,049	3,601,358
Total liabilities and stockholders’ equity	$ 5,901,448	$ 5,947,947

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 11,192	$ 10,343
Preferred stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Common stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	76,516,000	77,267,000
Common stock, shares outstanding	76,516,000	77,267,000

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss), Net	Retained Earnings
Beginning Balance (in shares) at Dec. 31, 2021		78,710
Beginning Balance at Dec. 31, 2021	$ 3,622,714	$ 8	$ 999,006	$ 4,326	$ 2,619,374
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	134,298				134,298
Net change in unrealized gains (losses) from investments	(2,728)			(2,728)
Net change in foreign currency translation adjustment	(7,311)			(7,311)
Issuance of common stock relating to employee equity compensation plans (in shares)		239
Issuance of common stock relating to employee equity compensation plans	14,827		14,827
Tax withholdings related to net share settlements of equity awards	(51,533)		(51,533)
Common stock repurchased and retired (in shares)		(144)
Common stock repurchased and retired	(75,036)		(1,634)		(73,402)
Stock-based compensation	31,621		31,621
Ending Balance (in shares) at Mar. 31, 2022		78,805
Ending Balance at Mar. 31, 2022	3,666,852	$ 8	992,287	(5,713)	2,680,270
Beginning Balance (in shares) at Dec. 31, 2022		77,267
Beginning Balance at Dec. 31, 2022	3,601,358	$ 8	1,044,946	(10,284)	2,566,688
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	87,798				87,798
Change in tax effect unrealized gains on investments	1,645			1,645
Net change in unrealized gains (losses) from investments	1,645
Net change in foreign currency translation adjustment	10,474			10,474
Issuance of common stock relating to employee equity compensation plans (in shares)		191
Issuance of common stock relating to employee equity compensation plans	14,256		14,256
Tax withholdings related to net share settlements of equity awards	(20,857)		(20,857)
Common stock repurchased and retired (in shares)		(942)
Common stock repurchased and retired	(292,360)		(11,387)		(280,973)
Equity forward contract related to accelerated stock repurchase	40,000		40,000
Stock-based compensation	37,735		37,735
Ending Balance (in shares) at Mar. 31, 2023		76,516
Ending Balance at Mar. 31, 2023	$ 3,480,049	$ 8	$ 1,104,693	$ 1,835	$ 2,373,513

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 87,798	$ 134,298
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred taxes	(18,417)	17,464
Depreciation and amortization	35,820	29,626
Stock-based compensation	37,735	31,621
Non-cash operating lease cost	7,755	7,526
Other non-cash operating activities	11,586	8,612
Changes in assets and liabilities, net of effects of acquisitions:
Accounts receivable	(32,734)	(55,543)
Inventories	24,008	(49,455)
Prepaid expenses and other assets	(26,850)	(48,665)
Accounts payable	5,993	7,025
Accrued and other long-term liabilities	37,420	(126,400)
Long-term income tax payable	2,119	5,405
Deferred revenues	27,662	68,984
Net cash provided by operating activities	199,895	30,498
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property, plant and equipment	(64,119)	(87,328)
Purchase of marketable securities	(2,371)	(15,041)
Proceeds from maturities of marketable securities	10,870	6,095
Proceeds from sales of marketable securities	2,785	8,528
Other investing activities	6	(2,452)
Net cash used in investing activities	(52,829)	(90,198)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock	14,256	14,827
Common stock repurchases	(292,360)	(75,036)
Payments for equity forward contracts related to accelerated share repurchase agreements	40,000	0
Payroll taxes paid upon the vesting of equity awards	(20,857)	(51,533)
Net cash used in financing activities	(258,961)	(111,742)
Effect of foreign exchange rate changes on cash, cash equivalents, and restricted cash	2,221	(1,826)
Net decrease in cash, cash equivalents, and restricted cash	(109,674)	(173,268)
Cash, cash equivalents, and restricted cash at beginning of the period	942,355	1,100,139
Cash, cash equivalents, and restricted cash at end of the period	$ 832,681	$ 926,871

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2023
Notes To Financial Statements [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation The accompanying unaudited Condensed Consolidated Financial Statements have been prepared by Align Technology, Inc. (“we”, “our”, "Company", or “Align”) on a consistent basis with the audited Consolidated Financial Statements for the year ended December 31, 2022, and contains all adjustments, including normal recurring adjustments, necessary to fairly state the information set forth herein. The unaudited Condensed Consolidated Financial Statements have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission (“SEC”), and, therefore, omit certain information and footnote disclosures necessary to present the unaudited Condensed Consolidated Financial Statements in accordance with accounting principles generally accepted in the United States of America (“U.S.”). The information included in this Quarterly Report on Form 10-Q should be read in conjunction with the Consolidated Financial Statements and notes thereto included in Item 8 of our Annual Report on Form 10-K for the year ended December 31, 2022. The results of operations for the three months ended March 31, 2023 are not necessarily indicative of the results that may be expected for the year ending December 31, 2023 or any other future period, and we make no representations related thereto. Use of Estimates The preparation of financial statements in conformity with generally accepted accounting principles (“GAAP”) in the U.S. requires our management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates. On an ongoing basis, we evaluate our estimates, including those related to revenue recognition, useful lives of intangible assets and property and equipment, long-lived assets and goodwill, income taxes, contingent liabilities, the fair values of financial instruments, stock-based compensation and the valuation of investments in privately held companies among others. We base our estimates on historical experience and on various other assumptions that are believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Certain Risks and Uncertainties Our business has been materially impacted by fluctuations in macroeconomic conditions and exacerbated by ongoing geopolitical issues. While the situation is highly uncertain and evolving, we have been and continue to be impacted by factors such as inflation, supply chain challenges, rising interest rates, volatilities in the financial market, foreign currency exchange rate fluctuations, impacts on consumer confidence and purchasing power, and global recession concerns which could further subject our business to materially adverse consequences should any portion of its impacts become prolonged or escalate beyond its current scope. Additionally, we could also be materially adversely affected by uncertain or reduced demand, labor shortages, delays in collection of outstanding receivables and the impact of any initiatives or programs that we may undertake to address financial and operational challenges faced by our customers. While the overall impact of the COVID-19 pandemic is gradually declining, we continue to be exposed to risks and uncertainties posed by it which varies by geographic regions at different levels. The extent to which our business could be impacted in the future by the pandemic is highly uncertain and difficult to predict. Recent Accounting Pronouncements (i) Recent Accounting Pronouncements Not Yet Effective We continue to monitor new accounting pronouncements issued by the FASB and do not believe any of the recently issued accounting pronouncements will have a material impact on our consolidated financial statements or related disclosures.

Financial Instruments

Financial Instruments	3 Months Ended
	Mar. 31, 2023
Investments, All Other Investments [Abstract]
Financial Instruments	Financial Instruments Cash, Cash Equivalents and Marketable Securities The following tables summarize our cash and cash equivalents, and marketable securities on our Consolidated Balance Sheets as of March 31, 2023 and December 31, 2022 (in thousands): Reported as: March 31, 2023 Amortized Gross Gross Fair Value Cash and Cash Equivalents Marketable securities, short-term Marketable securities, long-term Cash $ 650,946 $ — $ — $ 650,946 $ 650,946 $ — $ — Money market funds 181,437 — — 181,437 181,437 — — Corporate bonds 62,003 — (2,187) 59,816 — 35,284 24,532 U.S. government treasury bonds 17,057 7 (356) 16,708 — 12,039 4,669 Asset-backed securities 4,859 2 (24) 4,837 — 1,887 2,950 Municipal bonds 2,470 — (36) 2,434 — 2,434 — U.S. government agency bonds 5,280 2 (54) 5,228 — — 5,228 Total $ 924,052 $ 11 $ (2,657) $ 921,406 $ 832,383 $ 51,644 $ 37,379 Reported as: December 31, 2022 Amortized Gross Gross Fair Value Cash and Cash Equivalents Marketable securities, short-term Marketable securities, long-term Cash $ 712,921 $ — $ — $ 712,921 $ 712,921 $ — $ — Money market funds 229,129 — — 229,129 229,129 — — Corporate bonds 69,390 — (2,915) 66,475 — 36,510 29,965 U.S. government treasury bonds 20,559 — (549) 20,010 — 15,404 4,606 Asset-backed securities 4,514 1 (37) 4,478 — 2,909 1,569 Municipal bonds 3,447 — (61) 3,386 — 2,711 675 U.S. government agency bonds 5,231 1 (69) 5,163 — — 5,163 Total $ 1,045,191 $ 2 $ (3,631) $ 1,041,562 $ 942,050 $ 57,534 $ 41,978 The following table summarizes the fair value of our available-for-sale marketable securities classified by contractual maturity as of March 31, 2023 and December 31, 2022 (in thousands): March 31, 2023 December 31, 2022 Due in 1 year or less $ 45,512 $ 51,037 Due in 1 year through 5 years 43,511 48,475 Total $ 89,023 $ 99,512 The securities that we invest in are generally deemed to be low risk based on their credit ratings from the major rating agencies. The longer the duration of these securities, the more susceptible they are to changes in market interest rates and bond yields. As interest rates increase, those securities purchased at a lower yield show a mark-to-market unrealized loss. Our unrealized losses as of March 31, 2023 and December 31, 2022 are primarily due to changes in interest rates and credit spreads. The following tables summarize the gross unrealized losses as of March 31, 2023 and December 31, 2022, aggregated by investment category and length of time that individual securities have been in a continuous loss position (in thousands): As of March 31, 2023 Less than 12 months 12 Months of Greater Total March 31, 2023 Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Corporate bonds $ 1,793 $ (9) $ 58,022 $ (2,178) $ 59,815 $ (2,187) U.S. government treasury bonds — — 14,698 (356) 14,698 (356) Asset-backed securities 2,780 (13) 1,053 (11) 3,833 (24) Municipal bonds — — 2,154 (36) 2,154 (36) U.S. government agency bonds 2,037 (1) 1,150 (53) 3,187 (54) Total $ 6,610 $ (23) $ 77,077 $ (2,634) $ 83,687 $ (2,657) As of December 31, 2022 Less than 12 months 12 Months of Greater Total December 31, 2022 Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Corporate bonds $ 10,639 $ (440) $ 54,634 $ (2,475) $ 65,273 $ (2,915) U.S. government treasury bonds 5,262 (177) 14,748 (372) 20,010 (549) Asset-backed securities 2,636 (17) 1,275 (20) 3,911 (37) Municipal bonds — — 2,412 (61) 2,412 (61) U.S. government agency bonds 3,017 (5) 1,136 (64) 4,153 (69) Total $ 21,554 $ (639) $ 74,205 $ (2,992) $ 95,759 $ (3,631) Accounts Receivable Factoring We enter into factoring transactions on a non-recourse basis with financial institutions to sell certain of our non-U.S. accounts receivable. We account for these transactions as sales of accounts receivables and include the cash proceeds as a part of our cash flows from operations in the Condensed Consolidated Statements of Cash Flows. Total accounts receivable sold under the factoring arrangements was $8.0 million during the three months ended March 31, 2023. Factoring fees on the sales of receivables were recorded in other income (expense), net in our Condensed Consolidated Statement of Operations and were not material. Fair Value Measurements Fair value is an exit price, representing the amount that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. We use the GAAP fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. This hierarchy requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The three levels of inputs that may be used to measure fair value: Level 1 — Quoted (unadjusted) prices in active markets for identical assets or liabilities. Level 2 — Observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the asset or liability. We obtain fair values for our Level 2 investments. Our custody bank and asset managers independently use professional pricing services to gather pricing data which may include quoted market prices for identical or comparable financial instruments, or inputs other than quoted prices that are observable either directly or indirectly, and we are ultimately responsible for these underlying estimates. Level 3 — Unobservable inputs to the valuation methodology that are supported by little or no market activity and that are significant to the measurement of the fair value of the assets or liabilities. Level 3 assets and liabilities include those whose fair value measurements are determined using pricing models, discounted cash flow methodologies or similar valuation techniques, as well as significant management judgment or estimation. The following tables summarize our financial assets measured at fair value as of March 31, 2023 and December 31, 2022 (in thousands): Description Balance as of Level 1 Level 2 Cash equivalents: Money market funds $ 181,437 $ 181,437 $ — Short-term investments: U.S. government treasury bonds 12,039 12,039 — Corporate bonds 35,284 — 35,284 Municipal bonds 2,434 — 2,434 Asset-backed securities 1,887 — 1,887 Long-term investments: U.S. government treasury bonds 4,669 4,669 — Corporate bonds 24,532 — 24,532 Municipal bonds — — — U.S. government agency bonds 5,228 — 5,228 Asset-backed securities 2,950 — 2,950 $ 270,460 $ 198,145 $ 72,315 Description Balance as of December 31, 2022 Level 1 Level 2 Cash equivalents: Money market funds $ 229,129 $ 229,129 $ — Corporate bonds — — — Municipal bonds — — — Short-term investments: U.S. government treasury bonds 15,404 15,404 — Corporate bonds 36,510 — 36,510 Municipal bonds 2,711 — 2,711 Asset-backed securities 2,909 — 2,909 Long-term investments: U.S. government treasury bonds 4,606 4,606 — Corporate bonds 29,965 — 29,965 Municipal bonds 675 — 675 U.S. government agency bonds 5,163 — 5,163 Asset-backed securities 1,569 — 1,569 $ 328,641 $ 249,139 $ 79,502 Investments in Privately Held Companies Our investments in privately held companies in which we cannot exercise significant influence and do not own a majority equity interest or otherwise control are accounted for under the measurement alternative. Under the measurement alternative, the carrying value of our equity investment is adjusted to fair value for observable transactions for identical or similar investments of the same issuer. Investments in equity securities are reported on our Consolidated Balance Sheet as other assets, and we periodically evaluate them for impairment. We record any change in carrying value of our equity securities, in other income (expense), net in our Consolidated Statement of Operations. The carrying value of our equity investments in privately held companies without readily determinable fair values were not material as of March 31, 2023 or 2022 and the associated adjustments to the carrying values of the investments were not material during the quarter ended March 31, 2023 and 2022. Derivatives Not Designated as Hedging Instruments We enter into foreign currency forward contracts to minimize the short-term impact of foreign currency exchange rate fluctuations on certain trade and intercompany receivables and payables. These forward contracts are classified within Level 2 of the fair value hierarchy. As a result of the settlement of foreign currency forward contracts, we recognized a net loss of $6.4 million during the three months ended March 31, 2023 and the net losses we recognized during the three months ended March 31, 2022 were not material. As of March 31, 2023 and December 31, 2022, the fair value of foreign exchange forward contracts outstanding was not material. The following tables present the gross notional value of all our foreign exchange forward contracts outstanding as of March 31, 2023 and December 31, 2022 (in thousands): March 31, 2023 Local Currency Amount Notional Contract Amount (USD) Euro €203,780 $ 222,215 Canadian Dollar C$97,500 72,007 Chinese Yuan ¥478,805 69,842 Polish Zloty PLN277,000 64,459 British Pound £42,920 53,198 Japanese Yen ¥6,170,000 46,513 Brazilian Real R$158,800 31,055 Swiss Franc CHF25,600 28,081 Israeli Shekel ILS53,600 14,864 Mexican Peso M$230,000 12,744 New Zealand Dollar NZ$10,500 6,575 Korean Won ₩6,400,000 4,946 New Taiwan Dollar NT$83,000 2,737 Australian Dollar A$3,900 $ 2,615 Czech Koruna Kč56,000 2,589 $ 634,440 December 31, 2022 Local Currency Amount Notional Contract Amount (USD) Euro €186,900 $ 200,010 Polish Zloty PLN365,988 83,307 Canadian Dollar $109,000 80,514 Chinese Yuan ¥471,000 68,223 British Pound £41,200 49,677 Japanese Yen ¥6,200,000 47,196 Israeli Shekel ILS110,030 31,383 Swiss Franc CHF25,000 27,165 Brazilian Real R$141,200 26,839 Mexican Peso M$230,000 11,746 New Zealand Dollar NZ$6,000 3,806 Australian Dollar A$4,000 2,721 Czech Koruna Kč56,000 2,469 New Taiwan Dollar NT$60,000 1,959 $ 637,015

Balance Sheet Components

Balance Sheet Components	3 Months Ended
	Mar. 31, 2023
Notes To Financial Statements [Abstract]
Balance Sheet Components	Balance Sheet Components Inventories consist of the following (in thousands): March 31, December 31, Raw materials $ 146,435 $ 172,758 Work in process 91,325 96,558 Finished goods 74,125 69,436 Total inventories $ 311,885 $ 338,752 Prepaid expenses and other current assets consist of the following (in thousands): March 31, December 31, Value added tax receivables $ 144,668 $ 140,484 Prepaid expenses 84,363 69,124 Other current assets 22,509 16,762 Total prepaid expenses and other current assets $ 251,540 $ 226,370 Accrued liabilities consist of the following (in thousands): March 31, December 31, Accrued payroll and benefits $ 171,354 $ 149,508 Accrued income taxes 105,038 74,323 Accrued expenses 51,212 64,341 Accrued sales and marketing expenses 36,227 36,407 Current operating lease liabilities 27,776 26,574 Accrued property, plant and equipment 18,186 19,922 Other accrued liabilities 87,455 83,299 Total accrued liabilities $ 497,248 $ 454,374 Accrued warranty, which is included in the "Other accrued liabilities" category of the accrued liabilities table above, consists of the following activity (in thousands): Three Months Ended 2023 2022 Balance at beginning of period $ 17,873 $ 16,169 Charged to cost of net revenues 4,532 3,536 Actual warranty expenditures (3,476) (3,612) Balance at end of period $ 18,929 $ 16,093 Deferred revenues consist of the following (in thousands): March 31, December 31, Deferred revenues - current $ 1,376,789 $ 1,343,643 Deferred revenues - long-term 1 $ 157,341 $ 160,662 1 Included in Other long-term liabilities within our Condensed Consolidated Balance Sheet During the three months ended March 31, 2023 and 2022, we recognized $943.1 million and $973.2 million of net revenues, respectively, of which $205.7 million and $184.9 million was included in the deferred revenues balance at December 31, 2022 and 2021, respectively.

Goodwill and Long-lived Assets

Goodwill and Long-lived Assets	3 Months Ended
	Mar. 31, 2023
Notes To Financial Statements [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets Goodwill The change in the carrying value of goodwill for the three months ended March 31, 2023, categorized by reportable segments, is as follows (in thousands): Clear Aligner Systems and Services Total Balance as of December 31, 2022 $ 109,480 $ 298,071 $ 407,551 Foreign currency translation adjustments 852 5,819 6,671 Balance as of March 31, 2023 $ 110,332 $ 303,890 $ 414,222 Intangible Long-Lived Assets Acquired intangible long-lived assets were as follows, excluding intangibles that were fully amortized (in thousands): Weighted Average Amortization Period Gross Carrying Amount as of March 31, 2023 Accumulated Amortization Accumulated Impairment Loss Net Carrying Value as of March 31, 2023 Existing technology 10 $ 112,051 $ (36,486) $ (4,328) $ 71,237 Customer relationships 10 21,500 (6,450) — 15,050 Trademarks and tradenames 10 17,200 (6,901) (4,122) 6,177 Patents 8 6,511 (5,487) — 1,024 $ 157,262 $ (55,324) $ (8,450) 93,488 Foreign currency translation adjustments (168) Total intangible assets, net 1 $ 93,320 1 Also includes $33.5 million of fully amortized intangible assets related to customer relationships. Weighted Average Amortization Period Gross Carrying Amount as of December 31, 2022 Accumulated Amortization Accumulated Impairment Loss Net Carrying Value as of December 31, 2022 Existing technology 10 $ 112,051 $ (33,537) $ (4,328) $ 74,186 Customer relationships 10 21,500 (5,913) — 15,587 Trademarks and tradenames 10 17,200 (6,442) (4,122) 6,636 Patents 8 6,511 (5,288) — 1,223 $ 157,262 $ (51,180) $ (8,450) 97,632 Foreign currency translation adjustments (1,912) Total intangible assets, net $ 95,720 The total estimated annual future amortization expense for these acquired intangible assets as of March 31, 2023 is as follows (in thousands): Fiscal Year Ending December 31, Amortization Remainder of 2023 $ 12,357 2024 15,335 2025 14,959 2026 14,353 2027 11,992 Thereafter 24,492 Total $ 93,488 Amortization expense for the three months ended March 31, 2023 and 2022 was $4.1 million and $4.3 million, respectively.

Credit Facility

Credit Facility	3 Months Ended
	Mar. 31, 2023
Debt Disclosure [Abstract]
Credit Facility	Credit FacilityWe have a credit facility that provides for a $300.0 million unsecured revolving line of credit, along with a $50.0 million letter of credit. On December 23, 2022, we amended certain provisions in our credit facility which included extending the maturity date on the facility to December 23, 2027 and replacing the interest rate from the existing LIBOR with SOFR (“2022 Credit Facility”). The 2022 Credit Facility requires us to comply with specific financial conditions and performance requirements. Loans under the 2022 Credit Facility bear interest, at our option, at either a rate based on the SOFR for the applicable interest period or a base rate, in each case plus a margin. As of March 31, 2023, we had no outstanding borrowings under the 2022 Credit Facility and were in compliance with the conditions and performance requirements in all material respects.

Legal Proceedings

Legal Proceedings	3 Months Ended
	Mar. 31, 2023
Legal Proceedings [Abstract]
Legal Proceedings	Legal Proceedings 2019 Shareholder Derivative Lawsuit In January 2019, three derivative lawsuits were filed in the U.S. District Court for the Northern District of California which were later consolidated, purportedly on our behalf, naming as defendants the then current members of our Board of Directors along with certain of our executive officers. The complaints assert various state law causes of action, including for breaches of fiduciary duty, insider trading, and unjust enrichment. The complaints seek unspecified monetary damages on our behalf, which is named solely as a nominal defendant against whom no recovery is sought, as well as disgorgement and the costs and expenses associated with the litigation, including attorneys’ fees. The consolidated action is currently stayed. Defendants have not yet responded to the complaints. On April 12, 2019, a derivative lawsuit was also filed in California Superior Court for Santa Clara County, purportedly on our behalf, naming as defendants the members of our Board of Directors along with certain of our executive officers. The allegations in the complaint are similar to those in the derivative suits described above. The matter is currently stayed. Defendants have not yet responded to the complaint. We believe these claims are without merit. We are currently unable to predict the outcome of these lawsuits and therefore cannot determine the likelihood of loss nor estimate a range of possible loss . Antitrust Class Actions On June 5, 2020, a dental practice named Simon and Simon, PC doing business as City Smiles brought an antitrust action in the U.S. District Court for the Northern District of California on behalf of itself and a putative class of similarly situated practices seeking monetary damages and injunctive relief relating to our alleged market activities in alleged clear aligner and intraoral scanner markets. Plaintiff filed an amended complaint and added VIP Dental Spas as a plaintiff on August 14, 2020. A jury trial is scheduled to begin in this matter on June 29, 2024. We believe the plaintiffs’ claims are without merit and we intend to vigorously defend ourselves. On May 3, 2021, an individual named Misty Snow brought an antitrust action in the U.S. District Court for the Northern District of California on behalf of herself and a putative class of similarly situated individuals seeking monetary damages and injunctive relief relating to our alleged market activities in alleged clear aligner and intraoral scanner markets. Plaintiff filed an amended complaint on July 30, 2021 adding new plaintiffs and various state law claims. Plaintiffs filed a second amended complaint on October 21, 2021. On March 2, 2022, Plaintiffs filed a third amended complaint. On October 3, 2022, Plaintiffs filed a fourth amended complaint. On March 24, 2023, Plaintiffs requested the court grant leave to file a fifth amended complaint. That motion is pending before the court. A jury trial is scheduled to begin in this matter on June 29, 2024 for issues related to Section 2 allegations. A jury trial is scheduled to begin in this matter on September 30, 2024 for issues related to Section 1 allegations. We believe the plaintiffs’ claims are without merit and we intend to vigorously defend ourselves. We are currently unable to predict the outcome of these lawsuits and therefore we cannot determine the likelihood of loss, if any, nor estimate a range of possible loss. SDC Dispute On August 27, 2020, we initiated a confidential arbitration proceeding against SmileDirectClub LLC (“SDC”) before the American Arbitration Association in San Jose, California. This arbitration relates to the Strategic Supply Agreement (“Supply Agreement”) entered into between the parties in 2016. The complaint alleges that SDC breached the Supply Agreement ’ s terms, causing damages to us in an amount to be determined. On January 19, 2021, SDC filed a counterclaim alleging that we breached the Supply Agreement. On May 3, 2022, SDC filed an additional counterclaim alleging that we breached the Supply Agreement. We deny SDC's allegations in the counterclaims and we intend to vigorously defend ourselves against them. The arbitration hearing on our claims and SDC’s first counterclaim was held on July 18-27, 2022 in Chicago, Illinois. On October 27, 2022, the arbitrator issued an interim award on our claims and SDC’s first counterclaim finding that SDC breached the Supply Agreement, we did not breach the Supply Agreement, and SDC caused harm to us. Based on these findings, the arbitrator awarded us an interim award. On December 2, 2022, SDC filed a motion to re-open the arbitrator’s interim award in Align’s favor. On March 3, 2023, the arbitrator denied SDC ’ s motion to re-open. On March 6, 2023, Align filed a petition to confirm the arbitrator ’ s interim award. When confirmed, the interim award may be material to our results in the quarter reported. We anticipate recognizing the amount ultimately realizable following confirmation of the final award. The arbitration hearing on SDC’s second counterclaim was held on February 21-23, 2023 in Chicago, Illinois. We are currently unable to predict the outcome of SDC’s second counterclaim and therefore cannot determine the likelihood of loss or success nor estimate a range of possible loss or success, if any. In addition to the above, in the ordinary course of our operations, we are involved in a variety of claims, suits, investigations, and proceedings, including actions with respect to intellectual property claims, patent infringement claims, government investigations, labor and employment claims, breach of contract claims, tax, and other matters. Regardless of the outcome, these proceedings can have an adverse impact on us because of defense costs, diversion of management resources, and other factors. Although the results of complex legal proceedings are difficult to predict and our view of these matters may change in the future as litigation and events related thereto unfold; we currently do not believe that these matters, individually or in the aggregate, will materially affect our financial position, results of operations or cash flows.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Off-Balance Sheet Arrangements As of March 31, 2023, we had no material off-balance sheet arrangements that have, or are reasonably likely to have, a current or future material effect on our consolidated financial condition, results of operations, liquidity, capital expenditures or capital resources other than certain items disclosed in Note 8 “Commitments and Contingencies” of the Notes to Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2022. Indemnification Provisions In the normal course of business to facilitate transactions in our services and products, we indemnify certain parties: customers, vendors, lessors, and other parties with respect to certain matters, including, but not limited to, services to be provided by us and intellectual property infringement claims made by third parties. In addition, we have entered into indemnification agreements with our directors and our executive officers that will require us, among other things, to indemnify them against certain liabilities that may arise by reason of their status or service as directors or officers. Several of these agreements limit the time within which an indemnification claim can be made and the amount of the claim.

Stockholders' Equity

Stockholders' Equity	3 Months Ended
	Mar. 31, 2023
Stockholders' Equity Note [Abstract]
Stockholders' Equity	Stockholders’ Equity As of March 31, 2023, the 2005 Incentive Plan, as amended, has a total reserve of 27,783,379 shares of which 2,736,263 shares are available for issuance. Summary of Stock-Based Compensation Expense The stock-based compensation related to our stock-based awards and employee stock purchase plan for the three months ended March 31, 2023 and 2022 is as follows (in thousands): Three Months Ended 2023 2022 Cost of net revenues $ 1,807 $ 1,514 Selling, general and administrative 28,691 24,725 Research and development 7,237 5,382 Total stock-based compensation $ 37,735 $ 31,621 Restricted Stock Units (“RSUs”) The fair value of RSUs is based on our closing stock price on the date of grant. RSUs granted generally vest over a period of four years. A summary for the three months ended March 31, 2023 is as follows: Number of Shares Underlying RSUs (in thousands) Weighted Average Grant Date Fair Value Weighted Average Remaining Aggregate Unvested as of December 31, 2022 489 $ 427.23 Granted 487 316.22 Vested and released (171) 392.09 Forfeited (13) 411.99 Unvested as of March 31, 2023 792 $ 366.76 2.0 $ 264,520 As of March 31, 2023, we expect to recognize $246.2 million of total unamortized compensation costs, net of estimated forfeitures, related to RSUs over a weighted average period of 3.2 years. Market-Performance Based Restricted Stock Units (“MSUs”) We grant MSUs to members of senior management. Each MSU represents the right to one share of our common stock. The actual number of MSUs which will be eligible to vest will be based on the performance of Align’s stock price relative to the performance of a stock market index over the vesting period. MSUs vest over a period of three years and the maximum number eligible to vest in the future is 250% of the MSUs initially granted. The following table summarizes the MSU performance activity for the three months ended March 31, 2023: Number of Shares Underlying MSUs (in thousands) Weighted Average Grant Date Fair Value Weighted Average Remaining Contractual Term (in years) Aggregate Unvested as of December 31, 2022 144 $ 725.73 Granted 1 82 629.53 Vested and released (25) 392.67 Forfeited (41) 392.67 Unvested as of March 31, 2023 160 $ 812.75 2.2 $ 53,545 1 Includes MSUs vested during the period above 100% of the grant as actual shares released is based on Align ’ s stock performance over the vesting period. As of March 31, 2023, we expect to recognize $76.1 million of total unamortized compensation costs, net of estimated forfeitures, related to MSUs over a weighted average period of 2.2 years. Restricted Stock Units with Performance Conditions (“PSUs”) In the first quarter of 2023, we did not grant any PSUs to any employees. As of March 31, 2023, we expect to recognize $0.7 million of total unamortized compensation costs, net of estimated forfeitures, related to PSUs over a weighted average term of 1.8 years. Total PSUs granted were 4,728 and the weighted average grant date fair value for the PSUs was $201.63. Employee Stock Purchase Plan As of March 31, 2023, we have 2,046,725 shares available for future issuance under our Amended and Restated 2010 Employee Stock Purchase Plan (the “2010 Purchase Plan”). The fair value of the option component of the 2010 Purchase Plan shares was estimated at the grant date using the Black-Scholes option pricing model with the following weighted average assumptions: Three Months Ended 2023 2022 Expected term (in years) 1.8 1.5 Expected volatility 58.6 % 48.6 % Risk-free interest rate 4.8 % 1.0 % Expected dividends — — Weighted average fair value at grant date $ 138.13 $ 196.97 As of March 31, 2023, we expect to recognize $34.7 million of total unamortized compensation costs related to future employee stock purchases over a weighted average period of 1.2 years.

Common Stock Repurchase Program

Common Stock Repurchase Programs	3 Months Ended
	Mar. 31, 2023
Disclosure Common Stock Repurchase Program Additional Information [Abstract]
Common Stock Repurchase Programs	Common Stock Repurchase ProgramsIn May 2021, our Board of Directors authorized a plan to repurchase up to $1.0 billion of our common stock (“May 2021 Repurchase Program”). As of March 31, 2023, the authorization under the May 2021 Repurchase Program was completed. In January 2023, our Board of Directors authorized a plan to repurchase up to $1.0 billion of our common stock (“January 2023 Repurchase Program”), none of which had been utilized as of March 31, 2023. The January 2023 Repurchase Program does not have an expiration date. Accelerated Share Repurchase Agreements (“ASRs”) During the three months ended March 31, 2023, we entered into or completed ASRs providing for the repurchase of our common stock based on the volume-weighted average price during the term of the agreement, less an agreed upon discount. The following table summarizes the information regarding repurchases of our common stock under the ASRs: Agreement Repurchase Amount Paid Completion Total Shares Average Price per Share Q4 2022 May 2021 N/A 1 Q1 2023 136,448 $ 293.15 Q1 2023 May 2021 $ 250.0 Q1 2023 805,908 $ 310.21 1 During the fourth quarter of 2022, we entered into a $200.0 million ASR which was not completed as of December 31, 2022 . During the first quarter of 2023, we paid a final $40.0 million related to the $200.0 million ASR, closing this ASR with the final delivery of shares.

Accounting for Income Taxes

Accounting for Income Taxes	3 Months Ended
	Mar. 31, 2023
Notes To Financial Statements [Abstract]
Accounting for Income Taxes	Accounting for Income Taxes Our provision for income taxes was $46.8 million and $53.2 million for the three months ended March 31, 2023 and 2022, respectively, representing effective tax rates of 34.8% and 28.4%, respectively. Our effective tax rate differs from the statutory federal income tax rate of 21% for both the three months ended March 31, 2023 and 2022 primarily due to the recognition of additional tax expense resulting from foreign income taxed at different rates, state income taxes, and non-deductible expenses in the U.S. We exercise significant judgment in regards to estimates of future market growth, forecasted earnings and projected taxable income in determining the provision for income taxes and for purposes of assessing our ability to utilize any future benefit from deferred tax assets. We continue to assess the realizability of the deferred tax assets as we take into account new information. Our total gross unrecognized tax benefits, excluding interest and penalties, were $145.3 million and $141.6 million as of March 31, 2023 and December 31, 2022, respectively, a material amount of which would impact our effective tax rate if recognized. The increase in our unrecognized tax benefits relates primarily to positions taken on income tax return calculations finalized during the three months ended March 31, 2023 .

Net Income Per Share

Net Income Per Share	3 Months Ended
	Mar. 31, 2023
Earnings Per Share [Abstract]
Net Income Per Share	Net Income per Share The following table sets forth the computation of basic and diluted net income per share attributable to common stock (in thousands, except per share amounts): Three Months Ended 2023 2022 Numerator: Net income $ 87,798 $ 134,298 Denominator: Weighted average common shares outstanding, basic 76,921 78,742 Dilutive effect of potential common stock 190 451 Total shares, diluted 77,111 79,193 Net income per share, basic $ 1.14 $ 1.71 Net income per share, diluted $ 1.14 $ 1.70 Anti-dilutive potential common shares 1 578 151 1 Represents RSUs and MSUs not included in the calculation of diluted net income per share as the effect would have been anti-dilutive.

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	3 Months Ended
	Mar. 31, 2023
Supplemental Cash Flow Information [Abstract]
Supplemental Cash Flow Information	Supplemental Cash Flow Information The supplemental cash flow information consists of the following (in thousands): Three Months Ended 2023 2022 Non-cash investing and financing activities: Acquisition of property, plant and equipment in accounts payable and accrued liabilities $ 30,907 $ 58,876 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 7,871 $ 7,292 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 5,559 $ 12,262

Segments and Geographical Infor

Segments and Geographical Information	3 Months Ended
	Mar. 31, 2023
Segment Reporting [Abstract]
Segments and Geographical Information	Segments and Geographical Information Segment Information We report segment information based on the management approach. The management approach designates the internal reporting used by our Chief Operating Decision Maker for decision making and performance assessment as the basis for determining our reportable segments. The performance measures of our reportable segments include net revenues, gross profit and income from operations. Income from operations for each segment includes all geographic revenues, related cost of net revenues and operating expenses directly attributable to the segment. Certain operating expenses are attributable to operating segments and each allocation is measured differently based on the specific facts and circumstances of the costs being allocated. Costs not specifically allocated to segment income from operations include various corporate expenses such as stock-based compensation and costs related to IT, facilities, human resources, accounting and finance, legal and regulatory, and other separately managed general and administrative costs outside the operating segments and restructuring costs. We group our operations into two reportable segments: Clear Aligner segment and Imaging Systems and CAD/CAM services (“Systems and Services”) segment. Summarized financial information by segment is as follows (in thousands): Three Months Ended 2023 2022 Net revenues Clear Aligner $ 789,804 $ 809,696 Systems and Services 153,343 163,523 Total net revenues $ 943,147 $ 973,219 Gross profit Clear Aligner $ 566,139 $ 605,696 Systems and Services 94,515 103,650 Total gross profit $ 660,654 $ 709,346 Income from operations Clear Aligner $ 277,521 $ 312,719 Systems and Services 35,576 50,799 Unallocated corporate expenses (179,581) (165,436) Total income from operations $ 133,516 $ 198,082 Stock-based compensation Clear Aligner $ 4,654 $ 2,854 Systems and Services 321 214 Unallocated corporate expenses 32,760 28,553 Total stock-based compensation $ 37,735 $ 31,621 Depreciation and amortization Clear Aligner $ 16,398 $ 13,767 Systems and Services 8,146 6,922 Unallocated corporate expenses 11,276 8,937 Total depreciation and amortization $ 35,820 $ 29,626 The following table reconciles total segment income from operations in the table above to net income before provision for income taxes (in thousands): Three Months Ended 2023 2022 Total segment income from operations $ 313,097 $ 363,518 Unallocated corporate expenses (179,581) (165,436) Total income from operations 133,516 198,082 Interest income 2,337 677 Other income (expense), net (1,229) (11,273) Net income before provision for income taxes $ 134,624 $ 187,486 Geographical Information Net revenues are presented below by geographic area (in thousands): Three Months Ended 2023 2022 Net revenues 1 : U.S. $ 411,138 $ 420,920 Switzerland 313,131 331,739 Other International 218,878 220,560 Total net revenues $ 943,147 $ 973,219 1 Net revenues are attributed to countries based on the location of where revenues are recognized by our legal entities. Tangible long-lived assets, which includes Property, plant and equipment, net, and Operating lease right-of-use assets, net, are presented below by geographic area (in thousands): March 31, December 31, 2022 Long-lived assets 1 : Switzerland $ 563,557 $ 532,921 U.S. 212,323 214,804 Other International 2 604,824 603,010 Total long-lived assets $ 1,380,704 $ 1,350,735 1 Long-lived assets are attributed to countries based on the location of our entity that owns or leases the assets. 2 Certain prior period immaterial amounts have been reclassified to conform to current presentation.

Restructuring and Other Charges

Restructuring and Other Charges	3 Months Ended
	Mar. 31, 2023
Restructuring and Related Activities [Abstract]
Restructuring and Other Charges	Restructuring and Other Charges During the fourth quarter of 2022, we initiated a restructuring plan to increase efficiencies across the organization which is expected to be completed in the first half of 2023. During fiscal 2022 we incurred approximately $10.2 million in restructuring expenses, of which $3.9 million remained unpaid and was included in Accrued liabilities as of December 31, 2022. During the first quarter of 2023, we paid $3.7 million, and recorded incremental restructuring expenses in Restructuring and other charges of

Subsequent Event

Subsequent Event	3 Months Ended
	Mar. 31, 2023
Subsequent Events [Abstract]
Subsequent Event	Subsequent EventSubsequent to our quarter end on April 24, 2023, we entered into a Subscription Agreement (the "Subscription Agreement") with Heartland Dental Holding Corporation (“Heartland”) which provides, among other things, for us to acquire less than a 5% equity interest in Heartland through the purchase of Class A Common Stock for $75 million. In connection with the Subscription Agreement, we entered into a Stockholders’ Agreement, by and among us, Heartland Dental Topco, LLC (“Topco”) and funds and accounts managed by affiliates of KKR & Co. Inc. (“KKR”), and a Side Letter, by and among us, Heartland, Topco and KKR (the "Side Letter"). Subject to certain restrictions set forth in the Side Letter, we agreed to provisions applicable to Heartland’s stockholders, including certain drag-along and voting obligations.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2023
Notes To Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited Condensed Consolidated Financial Statements have been prepared by Align Technology, Inc. (“we”, “our”, "Company", or “Align”) on a consistent basis with the audited Consolidated Financial Statements for the year ended December 31, 2022, and contains all adjustments, including normal recurring adjustments, necessary to fairly state the information set forth herein. The unaudited Condensed Consolidated Financial Statements have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission (“SEC”), and, therefore, omit certain information and footnote disclosures necessary to present the unaudited Condensed Consolidated Financial Statements in accordance with accounting principles generally accepted in the United States of America (“U.S.”).
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with generally accepted accounting principles (“GAAP”) in the U.S. requires our management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates. On an ongoing basis, we evaluate our estimates, including those related to revenue recognition, useful lives of intangible assets and property and equipment, long-lived assets and goodwill, income taxes, contingent liabilities, the fair values of financial instruments, stock-based compensation and the valuation of investments in privately held companies among others. We base our estimates on historical experience and on various other assumptions that are believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities.
Certain Risk and Uncertainties	Certain Risks and Uncertainties Our business has been materially impacted by fluctuations in macroeconomic conditions and exacerbated by ongoing geopolitical issues. While the situation is highly uncertain and evolving, we have been and continue to be impacted by factors such as inflation, supply chain challenges, rising interest rates, volatilities in the financial market, foreign currency exchange rate fluctuations, impacts on consumer confidence and purchasing power, and global recession concerns which could further subject our business to materially adverse consequences should any portion of its impacts become prolonged or escalate beyond its current scope. Additionally, we could also be materially adversely affected by uncertain or reduced demand, labor shortages, delays in collection of outstanding receivables and the impact of any initiatives or programs that we may undertake to address financial and operational challenges faced by our customers.
Recent Accounting Pronouncements	Recent Accounting Pronouncements (i) Recent Accounting Pronouncements Not Yet Effective We continue to monitor new accounting pronouncements issued by the FASB and do not believe any of the recently issued accounting pronouncements will have a material impact on our consolidated financial statements or related disclosures.

Financial Instruments (Tables)

Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2023
Investments, All Other Investments [Abstract]
Cash and Cash Equivalents	The following tables summarize our cash and cash equivalents, and marketable securities on our Consolidated Balance Sheets as of March 31, 2023 and December 31, 2022 (in thousands): Reported as: March 31, 2023 Amortized Gross Gross Fair Value Cash and Cash Equivalents Marketable securities, short-term Marketable securities, long-term Cash $ 650,946 $ — $ — $ 650,946 $ 650,946 $ — $ — Money market funds 181,437 — — 181,437 181,437 — — Corporate bonds 62,003 — (2,187) 59,816 — 35,284 24,532 U.S. government treasury bonds 17,057 7 (356) 16,708 — 12,039 4,669 Asset-backed securities 4,859 2 (24) 4,837 — 1,887 2,950 Municipal bonds 2,470 — (36) 2,434 — 2,434 — U.S. government agency bonds 5,280 2 (54) 5,228 — — 5,228 Total $ 924,052 $ 11 $ (2,657) $ 921,406 $ 832,383 $ 51,644 $ 37,379 Reported as: December 31, 2022 Amortized Gross Gross Fair Value Cash and Cash Equivalents Marketable securities, short-term Marketable securities, long-term Cash $ 712,921 $ — $ — $ 712,921 $ 712,921 $ — $ — Money market funds 229,129 — — 229,129 229,129 — — Corporate bonds 69,390 — (2,915) 66,475 — 36,510 29,965 U.S. government treasury bonds 20,559 — (549) 20,010 — 15,404 4,606 Asset-backed securities 4,514 1 (37) 4,478 — 2,909 1,569 Municipal bonds 3,447 — (61) 3,386 — 2,711 675 U.S. government agency bonds 5,231 1 (69) 5,163 — — 5,163 Total $ 1,045,191 $ 2 $ (3,631) $ 1,041,562 $ 942,050 $ 57,534 $ 41,978
Marketable Securities	The following tables summarize our cash and cash equivalents, and marketable securities on our Consolidated Balance Sheets as of March 31, 2023 and December 31, 2022 (in thousands): Reported as: March 31, 2023 Amortized Gross Gross Fair Value Cash and Cash Equivalents Marketable securities, short-term Marketable securities, long-term Cash $ 650,946 $ — $ — $ 650,946 $ 650,946 $ — $ — Money market funds 181,437 — — 181,437 181,437 — — Corporate bonds 62,003 — (2,187) 59,816 — 35,284 24,532 U.S. government treasury bonds 17,057 7 (356) 16,708 — 12,039 4,669 Asset-backed securities 4,859 2 (24) 4,837 — 1,887 2,950 Municipal bonds 2,470 — (36) 2,434 — 2,434 — U.S. government agency bonds 5,280 2 (54) 5,228 — — 5,228 Total $ 924,052 $ 11 $ (2,657) $ 921,406 $ 832,383 $ 51,644 $ 37,379 Reported as: December 31, 2022 Amortized Gross Gross Fair Value Cash and Cash Equivalents Marketable securities, short-term Marketable securities, long-term Cash $ 712,921 $ — $ — $ 712,921 $ 712,921 $ — $ — Money market funds 229,129 — — 229,129 229,129 — — Corporate bonds 69,390 — (2,915) 66,475 — 36,510 29,965 U.S. government treasury bonds 20,559 — (549) 20,010 — 15,404 4,606 Asset-backed securities 4,514 1 (37) 4,478 — 2,909 1,569 Municipal bonds 3,447 — (61) 3,386 — 2,711 675 U.S. government agency bonds 5,231 1 (69) 5,163 — — 5,163 Total $ 1,045,191 $ 2 $ (3,631) $ 1,041,562 $ 942,050 $ 57,534 $ 41,978
Contractual Maturity of Marketable Securities	The following table summarizes the fair value of our available-for-sale marketable securities classified by contractual maturity as of March 31, 2023 and December 31, 2022 (in thousands): March 31, 2023 December 31, 2022 Due in 1 year or less $ 45,512 $ 51,037 Due in 1 year through 5 years 43,511 48,475 Total $ 89,023 $ 99,512
Unrealized Losses for Investments in a Continuous Unrealized Loss Position	The following tables summarize the gross unrealized losses as of March 31, 2023 and December 31, 2022, aggregated by investment category and length of time that individual securities have been in a continuous loss position (in thousands): As of March 31, 2023 Less than 12 months 12 Months of Greater Total March 31, 2023 Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Corporate bonds $ 1,793 $ (9) $ 58,022 $ (2,178) $ 59,815 $ (2,187) U.S. government treasury bonds — — 14,698 (356) 14,698 (356) Asset-backed securities 2,780 (13) 1,053 (11) 3,833 (24) Municipal bonds — — 2,154 (36) 2,154 (36) U.S. government agency bonds 2,037 (1) 1,150 (53) 3,187 (54) Total $ 6,610 $ (23) $ 77,077 $ (2,634) $ 83,687 $ (2,657) As of December 31, 2022 Less than 12 months 12 Months of Greater Total December 31, 2022 Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Corporate bonds $ 10,639 $ (440) $ 54,634 $ (2,475) $ 65,273 $ (2,915) U.S. government treasury bonds 5,262 (177) 14,748 (372) 20,010 (549) Asset-backed securities 2,636 (17) 1,275 (20) 3,911 (37) Municipal bonds — — 2,412 (61) 2,412 (61) U.S. government agency bonds 3,017 (5) 1,136 (64) 4,153 (69) Total $ 21,554 $ (639) $ 74,205 $ (2,992) $ 95,759 $ (3,631)
Financial Assets Measured At Fair Value On A Recurring Basis	The following tables summarize our financial assets measured at fair value as of March 31, 2023 and December 31, 2022 (in thousands): Description Balance as of Level 1 Level 2 Cash equivalents: Money market funds $ 181,437 $ 181,437 $ — Short-term investments: U.S. government treasury bonds 12,039 12,039 — Corporate bonds 35,284 — 35,284 Municipal bonds 2,434 — 2,434 Asset-backed securities 1,887 — 1,887 Long-term investments: U.S. government treasury bonds 4,669 4,669 — Corporate bonds 24,532 — 24,532 Municipal bonds — — — U.S. government agency bonds 5,228 — 5,228 Asset-backed securities 2,950 — 2,950 $ 270,460 $ 198,145 $ 72,315 Description Balance as of December 31, 2022 Level 1 Level 2 Cash equivalents: Money market funds $ 229,129 $ 229,129 $ — Corporate bonds — — — Municipal bonds — — — Short-term investments: U.S. government treasury bonds 15,404 15,404 — Corporate bonds 36,510 — 36,510 Municipal bonds 2,711 — 2,711 Asset-backed securities 2,909 — 2,909 Long-term investments: U.S. government treasury bonds 4,606 4,606 — Corporate bonds 29,965 — 29,965 Municipal bonds 675 — 675 U.S. government agency bonds 5,163 — 5,163 Asset-backed securities 1,569 — 1,569 $ 328,641 $ 249,139 $ 79,502
Schedule of Notional Amounts of Outstanding Derivative Positions	The following tables present the gross notional value of all our foreign exchange forward contracts outstanding as of March 31, 2023 and December 31, 2022 (in thousands): March 31, 2023 Local Currency Amount Notional Contract Amount (USD) Euro €203,780 $ 222,215 Canadian Dollar C$97,500 72,007 Chinese Yuan ¥478,805 69,842 Polish Zloty PLN277,000 64,459 British Pound £42,920 53,198 Japanese Yen ¥6,170,000 46,513 Brazilian Real R$158,800 31,055 Swiss Franc CHF25,600 28,081 Israeli Shekel ILS53,600 14,864 Mexican Peso M$230,000 12,744 New Zealand Dollar NZ$10,500 6,575 Korean Won ₩6,400,000 4,946 New Taiwan Dollar NT$83,000 2,737 Australian Dollar A$3,900 $ 2,615 Czech Koruna Kč56,000 2,589 $ 634,440 December 31, 2022 Local Currency Amount Notional Contract Amount (USD) Euro €186,900 $ 200,010 Polish Zloty PLN365,988 83,307 Canadian Dollar $109,000 80,514 Chinese Yuan ¥471,000 68,223 British Pound £41,200 49,677 Japanese Yen ¥6,200,000 47,196 Israeli Shekel ILS110,030 31,383 Swiss Franc CHF25,000 27,165 Brazilian Real R$141,200 26,839 Mexican Peso M$230,000 11,746 New Zealand Dollar NZ$6,000 3,806 Australian Dollar A$4,000 2,721 Czech Koruna Kč56,000 2,469 New Taiwan Dollar NT$60,000 1,959 $ 637,015

Balance Sheet Components (Table

Balance Sheet Components (Tables)	3 Months Ended
	Mar. 31, 2023
Notes To Financial Statements [Abstract]
Schedule of Inventories	Inventories consist of the following (in thousands): March 31, December 31, Raw materials $ 146,435 $ 172,758 Work in process 91,325 96,558 Finished goods 74,125 69,436 Total inventories $ 311,885 $ 338,752
Schedule of Prepaid Expense and Other Assets	Prepaid expenses and other current assets consist of the following (in thousands): March 31, December 31, Value added tax receivables $ 144,668 $ 140,484 Prepaid expenses 84,363 69,124 Other current assets 22,509 16,762 Total prepaid expenses and other current assets $ 251,540 $ 226,370
Schedule of Accrued Liabilities	Accrued liabilities consist of the following (in thousands): March 31, December 31, Accrued payroll and benefits $ 171,354 $ 149,508 Accrued income taxes 105,038 74,323 Accrued expenses 51,212 64,341 Accrued sales and marketing expenses 36,227 36,407 Current operating lease liabilities 27,776 26,574 Accrued property, plant and equipment 18,186 19,922 Other accrued liabilities 87,455 83,299 Total accrued liabilities $ 497,248 $ 454,374
Schedule of Warranty Accrual	Accrued warranty, which is included in the "Other accrued liabilities" category of the accrued liabilities table above, consists of the following activity (in thousands): Three Months Ended 2023 2022 Balance at beginning of period $ 17,873 $ 16,169 Charged to cost of net revenues 4,532 3,536 Actual warranty expenditures (3,476) (3,612) Balance at end of period $ 18,929 $ 16,093
Schedule of Deferred Revenues	Deferred revenues consist of the following (in thousands): March 31, December 31, Deferred revenues - current $ 1,376,789 $ 1,343,643 Deferred revenues - long-term 1 $ 157,341 $ 160,662 1 Included in Other long-term liabilities within our Condensed Consolidated Balance Sheet

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2023
Notes To Financial Statements [Abstract]
Summary of Goodwill by Reportable Segment	The change in the carrying value of goodwill for the three months ended March 31, 2023, categorized by reportable segments, is as follows (in thousands): Clear Aligner Systems and Services Total Balance as of December 31, 2022 $ 109,480 $ 298,071 $ 407,551 Foreign currency translation adjustments 852 5,819 6,671 Balance as of March 31, 2023 $ 110,332 $ 303,890 $ 414,222
Schedule of Amortized Intangible Assets	Acquired intangible long-lived assets were as follows, excluding intangibles that were fully amortized (in thousands): Weighted Average Amortization Period Gross Carrying Amount as of March 31, 2023 Accumulated Amortization Accumulated Impairment Loss Net Carrying Value as of March 31, 2023 Existing technology 10 $ 112,051 $ (36,486) $ (4,328) $ 71,237 Customer relationships 10 21,500 (6,450) — 15,050 Trademarks and tradenames 10 17,200 (6,901) (4,122) 6,177 Patents 8 6,511 (5,487) — 1,024 $ 157,262 $ (55,324) $ (8,450) 93,488 Foreign currency translation adjustments (168) Total intangible assets, net 1 $ 93,320 1 Also includes $33.5 million of fully amortized intangible assets related to customer relationships. Weighted Average Amortization Period Gross Carrying Amount as of December 31, 2022 Accumulated Amortization Accumulated Impairment Loss Net Carrying Value as of December 31, 2022 Existing technology 10 $ 112,051 $ (33,537) $ (4,328) $ 74,186 Customer relationships 10 21,500 (5,913) — 15,587 Trademarks and tradenames 10 17,200 (6,442) (4,122) 6,636 Patents 8 6,511 (5,288) — 1,223 $ 157,262 $ (51,180) $ (8,450) 97,632 Foreign currency translation adjustments (1,912) Total intangible assets, net $ 95,720
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	The total estimated annual future amortization expense for these acquired intangible assets as of March 31, 2023 is as follows (in thousands): Fiscal Year Ending December 31, Amortization Remainder of 2023 $ 12,357 2024 15,335 2025 14,959 2026 14,353 2027 11,992 Thereafter 24,492 Total $ 93,488

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2023
Stockholders' Equity Note [Abstract]
Stock-based Compensation Expense	The stock-based compensation related to our stock-based awards and employee stock purchase plan for the three months ended March 31, 2023 and 2022 is as follows (in thousands): Three Months Ended 2023 2022 Cost of net revenues $ 1,807 $ 1,514 Selling, general and administrative 28,691 24,725 Research and development 7,237 5,382 Total stock-based compensation $ 37,735 $ 31,621
Summary Of Restricted Stock Units	A summary for the three months ended March 31, 2023 is as follows: Number of Shares Underlying RSUs (in thousands) Weighted Average Grant Date Fair Value Weighted Average Remaining Aggregate Unvested as of December 31, 2022 489 $ 427.23 Granted 487 316.22 Vested and released (171) 392.09 Forfeited (13) 411.99 Unvested as of March 31, 2023 792 $ 366.76 2.0 $ 264,520
Summary Of Market-performance Based Restricted Stock Units	The following table summarizes the MSU performance activity for the three months ended March 31, 2023: Number of Shares Underlying MSUs (in thousands) Weighted Average Grant Date Fair Value Weighted Average Remaining Contractual Term (in years) Aggregate Unvested as of December 31, 2022 144 $ 725.73 Granted 1 82 629.53 Vested and released (25) 392.67 Forfeited (41) 392.67 Unvested as of March 31, 2023 160 $ 812.75 2.2 $ 53,545
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions	The fair value of the option component of the 2010 Purchase Plan shares was estimated at the grant date using the Black-Scholes option pricing model with the following weighted average assumptions: Three Months Ended 2023 2022 Expected term (in years) 1.8 1.5 Expected volatility 58.6 % 48.6 % Risk-free interest rate 4.8 % 1.0 % Expected dividends — — Weighted average fair value at grant date $ 138.13 $ 196.97

Common Stock Repurchase Progr_2

Common Stock Repurchase Programs (Tables)	3 Months Ended
	Mar. 31, 2023
Disclosure Common Stock Repurchase Program Additional Information [Abstract]
Accelerated Share Repurchase Agreements	The following table summarizes the information regarding repurchases of our common stock under the ASRs: Agreement Repurchase Amount Paid Completion Total Shares Average Price per Share Q4 2022 May 2021 N/A 1 Q1 2023 136,448 $ 293.15 Q1 2023 May 2021 $ 250.0 Q1 2023 805,908 $ 310.21 1 During the fourth quarter of 2022, we entered into a $200.0 million ASR which was not completed as of December 31, 2022 . During the first quarter of 2023, we paid a final $40.0 million related to the $200.0 million ASR, closing this ASR with the final delivery of shares.

Net Income Per Share (Tables)

Net Income Per Share (Tables)	3 Months Ended
	Mar. 31, 2023
Earnings Per Share [Abstract]
Schedule Of Earnings Per Share Basic And Diluted	The following table sets forth the computation of basic and diluted net income per share attributable to common stock (in thousands, except per share amounts): Three Months Ended 2023 2022 Numerator: Net income $ 87,798 $ 134,298 Denominator: Weighted average common shares outstanding, basic 76,921 78,742 Dilutive effect of potential common stock 190 451 Total shares, diluted 77,111 79,193 Net income per share, basic $ 1.14 $ 1.71 Net income per share, diluted $ 1.14 $ 1.70 Anti-dilutive potential common shares 1 578 151 1 Represents RSUs and MSUs not included in the calculation of diluted net income per share as the effect would have been anti-dilutive.

Supplemental Cash Flow Inform_2

Supplemental Cash Flow Information (Tables)	3 Months Ended
	Mar. 31, 2023
Supplemental Cash Flow Information [Abstract]
Schedule of Cash Flow, Supplemental Disclosures	The supplemental cash flow information consists of the following (in thousands): Three Months Ended 2023 2022 Non-cash investing and financing activities: Acquisition of property, plant and equipment in accounts payable and accrued liabilities $ 30,907 $ 58,876 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 7,871 $ 7,292 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 5,559 $ 12,262

Segments and Geographical Inf_2

Segments and Geographical Information (Tables)	3 Months Ended
	Mar. 31, 2023
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	Summarized financial information by segment is as follows (in thousands): Three Months Ended 2023 2022 Net revenues Clear Aligner $ 789,804 $ 809,696 Systems and Services 153,343 163,523 Total net revenues $ 943,147 $ 973,219 Gross profit Clear Aligner $ 566,139 $ 605,696 Systems and Services 94,515 103,650 Total gross profit $ 660,654 $ 709,346 Income from operations Clear Aligner $ 277,521 $ 312,719 Systems and Services 35,576 50,799 Unallocated corporate expenses (179,581) (165,436) Total income from operations $ 133,516 $ 198,082 Stock-based compensation Clear Aligner $ 4,654 $ 2,854 Systems and Services 321 214 Unallocated corporate expenses 32,760 28,553 Total stock-based compensation $ 37,735 $ 31,621 Depreciation and amortization Clear Aligner $ 16,398 $ 13,767 Systems and Services 8,146 6,922 Unallocated corporate expenses 11,276 8,937 Total depreciation and amortization $ 35,820 $ 29,626 The following table reconciles total segment income from operations in the table above to net income before provision for income taxes (in thousands): Three Months Ended 2023 2022 Total segment income from operations $ 313,097 $ 363,518 Unallocated corporate expenses (179,581) (165,436) Total income from operations 133,516 198,082 Interest income 2,337 677 Other income (expense), net (1,229) (11,273) Net income before provision for income taxes $ 134,624 $ 187,486
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas	Net revenues are presented below by geographic area (in thousands): Three Months Ended 2023 2022 Net revenues 1 : U.S. $ 411,138 $ 420,920 Switzerland 313,131 331,739 Other International 218,878 220,560 Total net revenues $ 943,147 $ 973,219 1 Net revenues are attributed to countries based on the location of where revenues are recognized by our legal entities. Tangible long-lived assets, which includes Property, plant and equipment, net, and Operating lease right-of-use assets, net, are presented below by geographic area (in thousands): March 31, December 31, 2022 Long-lived assets 1 : Switzerland $ 563,557 $ 532,921 U.S. 212,323 214,804 Other International 2 604,824 603,010 Total long-lived assets $ 1,380,704 $ 1,350,735 1 Long-lived assets are attributed to countries based on the location of our entity that owns or leases the assets. 2 Certain prior period immaterial amounts have been reclassified to conform to current presentation.

Financial Instruments - Cash, C

Financial Instruments - Cash, Cash Equivalents and Marketable Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Amortized Cost
Cash, cash equivalents and marketable securities	$ 924,052	$ 1,045,191
Gross Unrealized Gains
Cash, cash equivalents and marketable securities	11	2
Gross Unrealized Losses
Cash, cash equivalents and marketable securities	(2,657)	(3,631)
Fair Value
Cash and cash equivalents	832,383	942,050
Marketable securities	89,023	99,512
Cash, cash equivalents and marketable securities	921,406	1,041,562
Cash
Amortized Cost
Cash and cash equivalents	650,946	712,921
Fair Value
Cash and cash equivalents	650,946	712,921
Cash and Cash Equivalents
Fair Value
Cash, cash equivalents and marketable securities	832,383	942,050
Cash and Cash Equivalents | Cash
Fair Value
Cash and cash equivalents	650,946	712,921
Marketable securities, short-term
Fair Value
Cash, cash equivalents and marketable securities	51,644	57,534
Marketable securities, long-term
Fair Value
Cash, cash equivalents and marketable securities	37,379	41,978
Money market funds
Amortized Cost
Cash and cash equivalents	181,437	229,129
Gross Unrealized Losses
Cash and cash equivalents		0
Fair Value
Cash and cash equivalents	181,437	229,129
Money market funds | Cash and Cash Equivalents
Fair Value
Cash and cash equivalents	181,437	229,129
Corporate bonds
Amortized Cost
Marketable securities	62,003	69,390
Gross Unrealized Gains
Marketable securities	0	0
Gross Unrealized Losses
Marketable securities	(2,187)	(2,915)
Fair Value
Marketable securities	59,816	66,475
Corporate bonds | Cash and Cash Equivalents
Fair Value
Marketable securities		0
Corporate bonds | Marketable securities, short-term
Fair Value
Marketable securities	35,284	36,510
Corporate bonds | Marketable securities, long-term
Fair Value
Marketable securities	24,532	29,965
U.S. government treasury bonds
Amortized Cost
Marketable securities	17,057	20,559
Gross Unrealized Gains
Marketable securities	7	0
Gross Unrealized Losses
Marketable securities	(356)	(549)
Fair Value
Marketable securities	16,708	20,010
U.S. government treasury bonds | Marketable securities, short-term
Fair Value
Marketable securities	12,039	15,404
U.S. government treasury bonds | Marketable securities, long-term
Fair Value
Marketable securities	4,669	4,606
Asset-backed securities
Amortized Cost
Marketable securities	4,859	4,514
Gross Unrealized Gains
Marketable securities	2	1
Gross Unrealized Losses
Marketable securities	(24)	(37)
Fair Value
Marketable securities	4,837	4,478
Asset-backed securities | Marketable securities, short-term
Fair Value
Marketable securities	1,887	2,909
Asset-backed securities | Marketable securities, long-term
Fair Value
Marketable securities	2,950	1,569
Municipal bonds
Amortized Cost
Marketable securities	2,470	3,447
Gross Unrealized Gains
Marketable securities	0	0
Gross Unrealized Losses
Marketable securities	(36)	(61)
Fair Value
Marketable securities	2,434	3,386
Municipal bonds | Cash and Cash Equivalents
Fair Value
Marketable securities		0
Municipal bonds | Marketable securities, short-term
Fair Value
Marketable securities	2,434	2,711
Municipal bonds | Marketable securities, long-term
Fair Value
Marketable securities	0	675
U.S. government agency bonds
Amortized Cost
Marketable securities	5,280	5,231
Gross Unrealized Gains
Marketable securities	2	1
Gross Unrealized Losses
Marketable securities	(54)	(69)
Fair Value
Marketable securities	5,228	5,163
U.S. government agency bonds | Marketable securities, long-term
Fair Value
Marketable securities	$ 5,228	$ 5,163

Financial Instruments - Contrac

Financial Instruments - Contractual Maturity of Marketable Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Due in 1 year or less	$ 45,512	$ 51,037
Due in 1 year through 5 years	43,511	48,475
Total	$ 89,023	$ 99,512

Financial Instruments - Unreali

Financial Instruments - Unrealized Losses for Investments in a Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Less than 12 months, fair value	$ 6,610	$ 21,554
12 months or greater, fair value	77,077	74,205
Fair value	83,687	95,759
Less than 12 months, unrealized loss	(23)	(639)
12 months or greater, unrealized loss	(2,634)	(2,992)
Unrealized loss	(2,657)	(3,631)
Corporate bonds
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Less than 12 months, fair value	1,793	10,639
12 months or greater, fair value	58,022	54,634
Fair value	59,815	65,273
Less than 12 months, unrealized loss	(9)	(440)
12 months or greater, unrealized loss	(2,178)	(2,475)
Unrealized loss	(2,187)	(2,915)
U.S. government treasury bonds
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Less than 12 months, fair value	0	5,262
12 months or greater, fair value	14,698	14,748
Fair value	14,698	20,010
Less than 12 months, unrealized loss	0	(177)
12 months or greater, unrealized loss	(356)	(372)
Unrealized loss	(356)	(549)
Asset-backed securities
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Less than 12 months, fair value	2,780	2,636
12 months or greater, fair value	1,053	1,275
Fair value	3,833	3,911
Less than 12 months, unrealized loss	(13)	(17)
12 months or greater, unrealized loss	(11)	(20)
Unrealized loss	(24)	(37)
Municipal bonds
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Less than 12 months, fair value	0	0
12 months or greater, fair value	2,154	2,412
Fair value	2,154	2,412
Less than 12 months, unrealized loss	0	0
12 months or greater, unrealized loss	(36)	(61)
Unrealized loss	(36)	(61)
U.S. government agency bonds
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Less than 12 months, fair value	2,037	3,017
12 months or greater, fair value	1,150	1,136
Fair value	3,187	4,153
Less than 12 months, unrealized loss	(1)	(5)
12 months or greater, unrealized loss	(53)	(64)
Unrealized loss	$ (54)	$ (69)

Financial Instruments - Fair Va

Financial Instruments - Fair Value Measured On A Recurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	$ 51,644	$ 57,534
Long-term investments	37,379	41,978
Assets measured at fair value	270,460	328,641
Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Assets measured at fair value	198,145	249,139
Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Assets measured at fair value	72,315	79,502
U.S. government treasury bonds | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	12,039	15,404
Long-term investments	4,669	4,606
U.S. government treasury bonds | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	12,039	15,404
Long-term investments	4,669	4,606
U.S. government treasury bonds | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	0	0
Long-term investments	0	0
Corporate bonds | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents		0
Short-term investments	35,284	36,510
Long-term investments	24,532	29,965
Corporate bonds | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents		0
Short-term investments	0	0
Long-term investments	0	0
Corporate bonds | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents		0
Short-term investments	35,284	36,510
Long-term investments	24,532	29,965
Municipal bonds | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents		0
Short-term investments	2,434	2,711
Long-term investments	0	675
Municipal bonds | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents		0
Short-term investments	0	0
Long-term investments	0	0
Municipal bonds | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents		0
Short-term investments	2,434	2,711
Long-term investments	0	675
U.S. government agency bonds | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Long-term investments	5,228	5,163
U.S. government agency bonds | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Long-term investments	0	0
U.S. government agency bonds | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Long-term investments	5,228	5,163
Asset-backed securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	1,887	2,909
Long-term investments	2,950	1,569
Asset-backed securities | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	0	0
Long-term investments	0	0
Asset-backed securities | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments	1,887	2,909
Long-term investments	2,950	1,569
Money market funds | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	181,437	229,129
Money market funds | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	181,437	229,129
Money market funds | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	$ 0	$ 0

Financial Instruments - Narrati

Financial Instruments - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Marketable Securities and Fair Value Measurements [Abstract]
Accounts receivable sold	$ 8
Foreign Exchange Forward
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net losses on derivatives	6.4	$ 0
Fair value of derivative asset	$ 0		$ 0

Financial Instruments - Derivat

Financial Instruments - Derivative Financial Instruments (Details) - Level 2 - Prepaid expenses and other current assets: - Foreign Exchange Forward € in Thousands, ₪ in Thousands, ₩ in Thousands, ¥ in Thousands, ¥ in Thousands, £ in Thousands, zł in Thousands, SFr in Thousands, R$ in Thousands, Kč in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands

Mar. 31, 2023 EUR (€)

Mar. 31, 2023 USD ($)

Mar. 31, 2023 CAD ($)

Mar. 31, 2023 CNY (¥)

Mar. 31, 2023 PLN (zł)

Mar. 31, 2023 GBP (£)

Mar. 31, 2023 JPY (¥)

Mar. 31, 2023 BRL (R$)

Mar. 31, 2023 CHF (SFr)

Mar. 31, 2023 ILS (₪)

Mar. 31, 2023 MXN ($)

Mar. 31, 2023 NZD ($)

Mar. 31, 2023 KRW (₩)

Mar. 31, 2023 TWD ($)

Mar. 31, 2023 AUD ($)

Mar. 31, 2023 CZK (Kč)

Dec. 31, 2022 EUR (€)

Dec. 31, 2022 USD ($)

Dec. 31, 2022 CAD ($)

Dec. 31, 2022 CNY (¥)

Dec. 31, 2022 PLN (zł)

Dec. 31, 2022 GBP (£)

Dec. 31, 2022 JPY (¥)

Dec. 31, 2022 BRL (R$)

Dec. 31, 2022 CHF (SFr)

Dec. 31, 2022 ILS (₪)

Dec. 31, 2022 MXN ($)

Dec. 31, 2022 NZD ($)

Dec. 31, 2022 TWD ($)

Dec. 31, 2022 AUD ($)

Dec. 31, 2022 CZK (Kč)

Derivative [Line Items]

Notional amount

$ 634,440

$ 637,015

Euro

Derivative [Line Items]

Notional amount

€ 203,780

222,215

€ 186,900

200,010

Canadian Dollar

Derivative [Line Items]

Notional amount

72,007

$ 97,500

80,514

$ 109,000

Chinese Yuan

Derivative [Line Items]

Notional amount

69,842

¥ 478,805

68,223

¥ 471,000

Polish Zloty

Derivative [Line Items]

Notional amount

64,459

zł 277,000

83,307

zł 365,988

British Pound

Derivative [Line Items]

Notional amount

53,198

£ 42,920

49,677

£ 41,200

Japanese Yen

Derivative [Line Items]

Notional amount

46,513

¥ 6,170,000

47,196

¥ 6,200,000

Brazilian Real

Derivative [Line Items]

Notional amount

31,055

R$ 158800

26,839

R$ 141200

Swiss Franc

Derivative [Line Items]

Notional amount

28,081

SFr 25,600

27,165

SFr 25,000

Israeli Shekel

Derivative [Line Items]

Notional amount

14,864

₪ 53,600

31,383

₪ 110,030

Mexican Peso

Derivative [Line Items]

Notional amount

12,744

$ 230,000

11,746

$ 230,000

New Zealand Dollar

Derivative [Line Items]

Notional amount

6,575

$ 10,500

3,806

$ 6,000

Korean Won

Derivative [Line Items]

Notional amount

4,946

₩ 6,400,000

New Taiwan Dollar

Derivative [Line Items]

Notional amount

2,737

$ 83,000

1,959

$ 60,000

Australian Dollar

Derivative [Line Items]

Notional amount

2,615

$ 3,900

2,721

$ 4,000

Czech Koruna

Derivative [Line Items]

Notional amount

$ 2,589

Kč 56,000

$ 2,469

Kč 56,000

Balance Sheet Components Invent

Balance Sheet Components Inventories (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Notes To Financial Statements [Abstract]
Raw materials	$ 146,435	$ 172,758
Work in process	91,325	96,558
Finished goods	74,125	69,436
Total inventories	$ 311,885	$ 338,752

Balance Sheet Components Prepai

Balance Sheet Components Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Notes To Financial Statements [Abstract]
Value added tax receivables	$ 144,668	$ 140,484
Prepaid expenses	84,363	69,124
Other current assets	22,509	16,762
Total prepaid expenses and other current assets	$ 251,540	$ 226,370

Balance Sheet Components Accrue

Balance Sheet Components Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Notes To Financial Statements [Abstract]
Accrued payroll and benefits	$ 171,354	$ 149,508
Accrued income taxes	105,038	74,323
Accrued expenses	51,212	64,341
Accrued sales and marketing expenses	36,227	36,407
Current operating lease liabilities	27,776	26,574
Accrued property, plant and equipment	18,186	19,922
Other accrued liabilities	87,455	83,299
Accrued liabilities	$ 497,248	$ 454,374

Balance Sheet Components Warran

Balance Sheet Components Warranty Accrual Activity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance at beginning of period	$ 17,873	$ 16,169
Charged to cost of net revenues	4,532	3,536
Actual warranty expenditures	(3,476)	(3,612)
Balance at end of period	$ 18,929	$ 16,093

Balance Sheet Components Deferr

Balance Sheet Components Deferred Revenues (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Notes To Financial Statements [Abstract]
Deferred revenues - current	$ 1,376,789	$ 1,343,643
Deferred revenues - long-term	$ 157,341	$ 160,662

Balance Sheet Components Narrat

Balance Sheet Components Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Condensed Balance Sheet Statements, Captions [Line Items]
Net revenues	$ 943,147	$ 973,219
Deferred revenues	205,700	$ 184,900
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-04-01
Condensed Balance Sheet Statements, Captions [Line Items]
Revenue, remaining performance obligation	$ 1,540,900
Minimum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-04-01
Condensed Balance Sheet Statements, Captions [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	6 months
Maximum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01
Condensed Balance Sheet Statements, Captions [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	5 years

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Change in Carrying Value of Goodwill (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($)
Goodwill [Roll Forward]
Balance as of December 31, 2022	$ 407,551
Foreign currency translation adjustments	6,671
Balance as of March 31, 2023	414,222
Clear Aligner
Goodwill [Roll Forward]
Balance as of December 31, 2022	109,480
Foreign currency translation adjustments	852
Balance as of March 31, 2023	110,332
Systems and Services
Goodwill [Roll Forward]
Balance as of December 31, 2022	298,071
Foreign currency translation adjustments	5,819
Balance as of March 31, 2023	$ 303,890

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 157,262	$ 157,262
Accumulated Amortization	(55,324)	(51,180)
Accumulated Impairment Loss	(8,450)	(8,450)
Net carrying value	93,488	97,632
Foreign currency translation adjustments	(168)	(1,912)
Total intangible assets	$ 93,320	$ 95,720
Existing technology
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)	10 years	10 years
Gross carrying amount	$ 112,051	$ 112,051
Accumulated Amortization	(36,486)	(33,537)
Accumulated Impairment Loss	(4,328)	(4,328)
Net carrying value	$ 71,237	$ 74,186
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)	10 years	10 years
Gross carrying amount	$ 21,500	$ 21,500
Accumulated Amortization	(6,450)	(5,913)
Accumulated Impairment Loss	0	0
Net carrying value	15,050	$ 15,587
Fully amortized intangible assets	$ 33,500
Trademarks and tradenames
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)	10 years	10 years
Gross carrying amount	$ 17,200	$ 17,200
Accumulated Amortization	(6,901)	(6,442)
Accumulated Impairment Loss	(4,122)	(4,122)
Net carrying value	$ 6,177	$ 6,636
Patents
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)	8 years	8 years
Gross carrying amount	$ 6,511	$ 6,511
Accumulated Amortization	(5,487)	(5,288)
Accumulated Impairment Loss	0	0
Net carrying value	$ 1,024	$ 1,223

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Total Estimated Annual Future Amortization Expense for Acquired Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Disclosure Total Estimated Annual Future Amortization Expense For Acquired Intangible Assets [Abstract]
Remainder of 2023	$ 12,357
2024	15,335
2025	14,959
2026	14,353
2027	11,992
Thereafter	24,492
Net carrying value	$ 93,488	$ 97,632

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization	$ 4.1	$ 4.3

Credit Facility - Additional In

Credit Facility - Additional Information (Details) - 2022 Credit Facility	Mar. 31, 2023 USD ($)
Line of Credit Facility [Line Items]
Outstanding borrowings	$ 0
Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit, available borrowings	300,000,000
Letter of Credit
Line of Credit Facility [Line Items]
Line of credit, available borrowings	$ 50,000,000

Legal Proceedings - Narrative (

Legal Proceedings - Narrative (Details)	Jan. 31, 2019 claim
Shareholder Derivative Lawsuit
Loss Contingencies [Line Items]
Number of lawsuits	3

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Incentive Plan 2005
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for issuance	27,783,379
Shares available for issuance	2,736,263
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuance	2,046,725
Total unamortized compensation cost	$ 34.7
Weighted average period of total unamortized cost (in years)	1 year 2 months 12 days
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Total unamortized compensation cost	$ 246.2
Weighted average period of total unamortized cost (in years)	3 years 2 months 12 days
Total granted (in shares)	792,000	489,000
Weighted average grant date fair value (in usd per share)	$ 366.76	$ 427.23
Market Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Total unamortized compensation cost	$ 76.1
Weighted average period of total unamortized cost (in years)	2 years 2 months 12 days
Maximum percentage of market-performance based restricted stock units eligible to vest over the vesting period	250%
Total granted (in shares)	160,000	144,000
Weighted average grant date fair value (in usd per share)	$ 812.75	$ 725.73
PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unamortized compensation cost	$ 0.7
Weighted average period of total unamortized cost (in years)	1 year 9 months 18 days
Total granted (in shares)	4,728
Weighted average grant date fair value (in usd per share)	$ 201.63

Stockholders' Equity - Stock-Ba

Stockholders' Equity - Stock-Based Compensation Expense Related to All Stock-Based Awards and Employee Stock Purchases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation	$ 37,735	$ 31,621
Cost of net revenues
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation	1,807	1,514
Selling, general and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation	28,691	24,725
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation	$ 7,237	$ 5,382

Stockholders' Equity - Summary

Stockholders' Equity - Summary of Nonvested Shares (Details) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($) $ / shares shares
Restricted Stock Units (RSUs)
Number of Shares Underlying RSUs
Unvested, beginning of period (in shares) | shares	489
Granted (in shares) | shares	487
Vested and released (in shares) | shares	(171)
Forfeited (in shares) | shares	(13)
Unvested, end of period (in shares) | shares	792
Weighted Average Grant Date Fair Value
Unvested, beginning of period (in usd per share) | $ / shares	$ 427.23
Granted (in usd per share) | $ / shares	316.22
Vested and released (in usd per share) | $ / shares	392.09
Forfeited (in usd per share) | $ / shares	411.99
Unvested, end of period (in usd per share) | $ / shares	$ 366.76
Weighted Average Remaining Contractual Term (in years)
Weighted average remaining contractual term	2 years
Aggregate Intrinsic Value
Aggregate intrinsic value | $	$ 264,520
Market Performance Based Restricted Stock Units
Number of Shares Underlying RSUs
Unvested, beginning of period (in shares) | shares	144
Granted (in shares) | shares	82
Vested and released (in shares) | shares	(25)
Forfeited (in shares) | shares	(41)
Unvested, end of period (in shares) | shares	160
Weighted Average Grant Date Fair Value
Unvested, beginning of period (in usd per share) | $ / shares	$ 725.73
Granted (in usd per share) | $ / shares	629.53
Vested and released (in usd per share) | $ / shares	392.67
Forfeited (in usd per share) | $ / shares	392.67
Unvested, end of period (in usd per share) | $ / shares	$ 812.75
Weighted Average Remaining Contractual Term (in years)
Weighted average remaining contractual term	2 years 2 months 12 days
Aggregate Intrinsic Value
Aggregate intrinsic value | $	$ 53,545

Stockholders' Equity - Stock-_2

Stockholders' Equity - Stock-based Compensation Employee Stock Purchase Plan Fair Value Assumptions (Details) - Employee Stock Purchase Plan - $ / shares	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Class of Stock [Line Items]
Expected term (in years)	1 year 9 months 18 days	1 year 6 months
Expected volatility	58.60%	48.60%
Risk-free interest rate	4.80%	1%
Expected dividends	0%	0%
Weighted average fair value at grant date (in usd per share)	$ 138.13	$ 196.97

Common Stock Repurchase Progr_3

Common Stock Repurchase Programs - Additional Information (Details) - USD ($)	Jan. 31, 2023	May 31, 2021
May 2021 Repurchase Program
Share Repurchases [Line Items]
Authorized repurchase amount		$ 1,000,000,000
January 2023 Repurchase Program
Share Repurchases [Line Items]
Authorized repurchase amount	$ 1,000,000,000

Common Stock Repurchase Progr_4

Common Stock Repurchase Programs - Accelerated Share Repurchase Agreements (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	May 31, 2021
Share Repurchases [Line Items]
Amount paid	$ 292,360,000	$ 75,036,000
May 2021 Repurchase Program
Share Repurchases [Line Items]
Authorized repurchase amount				$ 1,000,000,000
May 2021 Repurchase Program | Fourth Quarter 2022
Share Repurchases [Line Items]
Amount paid	$ 40,000,000
Total shares received (in shares)	136,448
Average price per share (in dollars per share)	$ 293.15
Authorized repurchase amount			$ 200,000,000
May 2021 Repurchase Program | First Quarter 2023
Share Repurchases [Line Items]
Amount paid	$ 250,000,000
Total shares received (in shares)	805,908
Average price per share (in dollars per share)	$ 310.21

Accounting for Income Taxes - A

Accounting for Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Disclosure Accounting For Income Taxes Additional Information [Abstract]
Provision for income taxes	$ 46,826	$ 53,188
Effective income tax rate, continuing operations	34.80%	28.40%
Unrecognized tax benefits	$ 145,300		$ 141,600

Computation of Basic and Dilute

Computation of Basic and Diluted Net Income Per Share Attributable to Common Stock (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Net income	$ 87,798	$ 134,298
Weighted average common shares outstanding, basic (in shares)	76,921	78,742
Dilutive effect of potential common stock (in shares)	190	451
Total shares, diluted (in shares)	77,111	79,193
Net income per share, basic (in usd per share)	$ 1.14	$ 1.71
Net income per share, diluted (in usd per share)	$ 1.14	$ 1.70
Anti-dilutive potential common shares (in shares)	578	151

Supplemental Cash Flow Inform_3

Supplemental Cash Flow Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Non-cash investing and financing activities:
Acquisition of property, plant and equipment in accounts payable and accrued liabilities	$ 30,907	$ 58,876
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	7,871	7,292
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$ 5,559	$ 12,262

Segments and Geographical Inf_3

Segments and Geographical Information - Additional Information (Details)	3 Months Ended
	Mar. 31, 2023 segment
Segment Reporting [Abstract]
Number of reportable segments	2

Segments and Geographical Inf_4

Segments and Geographical Information - Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Segment Reporting Information [Line Items]
Net revenues	$ 943,147	$ 973,219
Gross profit	660,654	709,346
Income from operations	133,516	198,082
Stock-based compensation	37,735	31,621
Depreciation and amortization	35,820	29,626
Interest income	2,337	677
Other income (expense), net	(1,229)	(11,273)
Net income before provision for income taxes	134,624	187,486
Operating Segments
Segment Reporting Information [Line Items]
Income from operations	313,097	363,518
Unallocated corporate expenses
Segment Reporting Information [Line Items]
Income from operations	(179,581)	(165,436)
Stock-based compensation	32,760	28,553
Depreciation and amortization	11,276	8,937
Clear Aligner
Segment Reporting Information [Line Items]
Net revenues	789,804	809,696
Gross profit	566,139	605,696
Clear Aligner | Operating Segments
Segment Reporting Information [Line Items]
Income from operations	277,521	312,719
Stock-based compensation	4,654	2,854
Depreciation and amortization	16,398	13,767
Systems and Services
Segment Reporting Information [Line Items]
Net revenues	153,343	163,523
Gross profit	94,515	103,650
Systems and Services | Operating Segments
Segment Reporting Information [Line Items]
Income from operations	35,576	50,799
Stock-based compensation	321	214
Depreciation and amortization	$ 8,146	$ 6,922

Segments and Geographical Inf_5

Segments and Geographical Information - Net Revenues by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Segment Reporting Information [Line Items]
Net revenues	$ 943,147	$ 973,219
U.S.
Segment Reporting Information [Line Items]
Net revenues	411,138	420,920
Switzerland
Segment Reporting Information [Line Items]
Net revenues	313,131	331,739
Other International
Segment Reporting Information [Line Items]
Net revenues	$ 218,878	$ 220,560

Segments and Geographical Inf_6

Segments and Geographical Information - Long-Lived Assets by Geographic Area (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Total long-lived assets	$ 1,380,704	$ 1,350,735
Switzerland
Segment Reporting Information [Line Items]
Total long-lived assets	563,557	532,921
U.S.
Segment Reporting Information [Line Items]
Total long-lived assets	212,323	214,804
Other International
Segment Reporting Information [Line Items]
Total long-lived assets	$ 604,824	$ 603,010

Restructuring and Other Charg_2

Restructuring and Other Charges (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Restructuring and Related Activities [Abstract]
Restructuring expenses	$ 0.1	$ 10.2
Unpaid restructuring charges	0.3	$ 3.9
Payments for restructuring	$ 3.7

Subsequent Events (Details)

Subsequent Events (Details) - Subsequent Event - Heartland $ in Millions	Apr. 24, 2023 USD ($)
Subsequent Event [Line Items]
Equity interest (less than)	5%
Purchase of equity interest	$ 75