BlackLine (BL) 10-Q 7 Aug 24 2024 Q2 Quarterly report Financial data

Cover

Cover - shares	6 Months Ended
	Jun. 30, 2024	Aug. 02, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2024
Document Transition Report	false
Entity File Number	001-37924
Entity Registrant Name	BlackLine, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	46-3354276
Entity Address, Address Line One	21300 Victory Boulevard
Entity Address, Address Line Two	12th Floor
Entity Address, City or Town	Woodland Hills
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	91367
City Area Code	818
Local Phone Number	223-9008
Title of 12(b) Security	Common stock, par value $0.01 per share
Trading Symbol	BL
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		62,175,084
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q2
Entity Central Index Key	0001666134
Current Fiscal Year End Date	--12-31

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 616,629	$ 271,117
Marketable securities (amortized cost of $428,617 and $932,850 at June 30, 2024 and December 31, 2023, respectively)	428,461	933,355
Accounts receivable, net of allowances of $3,459 and $5,064 at June 30, 2024 and December 31, 2023, respectively	137,439	171,608
Prepaid expenses and other current assets	27,677	31,244
Total current assets	1,210,206	1,407,324
Capitalized software development costs, net	40,873	37,828
Property and equipment, net	11,791	14,867
Intangible assets, net	68,665	79,056
Goodwill	448,965	448,965
Operating lease right-of-use assets	18,245	19,173
Other assets	91,937	93,552
Total assets	1,890,682	2,100,765
Current liabilities:
Accounts payable	2,083	8,623
Accrued expenses and other current liabilities	51,924	59,690
Deferred revenue, current	311,256	320,133
Finance lease liabilities, current	469	778
Operating lease liabilities, current	4,035	4,108
Convertible senior notes, net, current	249,888	249,233
Total current liabilities	619,655	642,565
Finance lease liabilities, noncurrent	0	4
Operating lease liabilities, noncurrent	14,426	15,738
Convertible senior notes, net, noncurrent	890,979	1,140,608
Deferred tax liabilities, net	5,017	6,394
Deferred revenue, noncurrent	1,979	904
Other long-term liabilities	795	3,608
Total liabilities	1,532,851	1,809,821
Commitments and contingencies (Note 12)
Redeemable non-controlling interest (Note 3)	32,068	30,063
Stockholders' equity:
Common stock, $0.01 par value, 500,000,000 shares authorized, 62,171,009 and 61,515,105 issued and outstanding at June 30, 2024 and December 31, 2023, respectively	622	615
Additional paid-in capital	451,737	474,863
Accumulated other comprehensive income (loss)	(561)	205
Accumulated deficit	(126,035)	(214,802)
Total stockholders' equity	325,763	260,881
Total liabilities, redeemable non-controlling interest, and stockholders' equity	$ 1,890,682	$ 2,100,765

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (PARENTHETICAL) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Amortized cost	$ 428,617	$ 932,850
Allowances for credit losses	$ 3,459	$ 5,064
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	500,000,000	500,000,000
Common stock, shares, issued (in shares)	62,171,009	61,515,105
Common stock, shares, outstanding (in shares)	62,171,009	61,515,105

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenues
Total revenues	$ 160,506	$ 144,574	$ 317,967	$ 283,558
Cost of revenues
Total cost of revenues	40,348	37,116	79,445	72,387
Gross profit	120,158	107,458	238,522	211,171
Operating expenses
Sales and marketing	60,248	62,749	121,359	124,680
Research and development	25,721	26,802	50,736	53,907
General and administrative	31,053	(148)	61,099	28,828
Restructuring costs	928	135	1,372	1,149
Total operating expenses	117,950	89,538	234,566	208,564
Income from operations	2,208	17,920	3,956	2,607
Other income (expense)
Interest income	14,065	12,542	29,425	23,207
Interest expense	(2,089)	(1,470)	(3,558)	(2,925)
Gain on extinguishment of convertible senior notes	65,112	0	65,112	0
Other income, net	77,088	11,072	90,979	20,282
Income before income taxes	79,296	28,992	94,935	22,889
Provision for income taxes	4,337	926	5,206	1,554
Net income	74,959	28,066	89,729	21,335
Net income attributable to redeemable non-controlling interest	524	320	962	405
Adjustment attributable to redeemable non-controlling interest	(2,255)	(3,103)	1,248	2,089
Net income attributable to BlackLine, Inc.	$ 76,690	$ 30,849	$ 87,519	$ 18,841
Basic net income per share attributable to BlackLine, Inc. (in usd per share)	$ 1.24	$ 0.51	$ 1.42	$ 0.31
Shares used to calculate basic net income per share (in shares)	61,979	60,700	61,811	60,445
Diluted net income per share attributable to BlackLine, Inc. (in usd per share)	$ 0.22	$ 0.45	$ 0.39	$ 0.30
Shares used to calculate diluted net income per share (in shares)	72,522	71,801	72,708	71,801
Subscription and support
Revenues
Total revenues	$ 151,787	$ 135,881	$ 301,288	$ 266,307
Cost of revenues
Total cost of revenues	33,756	30,630	65,808	59,142
Professional services
Revenues
Total revenues	8,719	8,693	16,679	17,251
Cost of revenues
Total cost of revenues	$ 6,592	$ 6,486	$ 13,637	$ 13,245

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 74,959	$ 28,066	$ 89,729	$ 21,335
Other comprehensive loss:
Net change in unrealized gains (losses) on marketable securities, net of tax benefit of $— and $123, for the quarter and six months ended June 30, 2024, respectively, and $— for the quarter and six months ended June 30, 2023.	44	(1,200)	(538)	66
Foreign currency translation	(217)	(179)	(433)	(224)
Other comprehensive loss	(173)	(1,379)	(971)	(158)
Comprehensive income	74,786	26,687	88,758	21,177
Less comprehensive income attributable to redeemable non-controlling interest:
Net income attributable to redeemable non-controlling interest	524	320	962	405
Foreign currency translation attributable to redeemable non-controlling interest	(101)	(81)	(205)	(101)
Comprehensive income attributable to redeemable non-controlling interest	423	239	757	304
Comprehensive income attributable to BlackLine, Inc.	$ 74,363	$ 26,448	$ 88,001	$ 20,873

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) (PARENTHETICAL) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net change in unrealized gains (losses) on marketable securities, tax	$ 0	$ 0	$ 123	$ 0

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2022		60,017
Beginning balance at Dec. 31, 2022	$ 111,868	$ 600	$ 385,709	$ (1,472)	$ (272,969)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)		359
Stock option exercises	11,915	$ 4	11,911
Vesting of restricted stock units (in shares)		455
Vesting of restricted stock units	5	$ 5
Issuance of common stock through employee stock purchase plan (in shares)		116
Issuance of common stock through employee stock purchase plan	5,291	$ 1	5,290
Acquisition of common stock for tax withholding obligations	(13,422)		(13,422)
Stock-based compensation	41,921		41,921
Other comprehensive loss	(57)			(57)
Net income attributable to BlackLine, Inc., including adjustment to redeemable non-controlling interest	18,841		(2,089)		20,930
Ending balance (in shares) at Jun. 30, 2023		60,947
Ending balance at Jun. 30, 2023	176,362	$ 610	429,320	(1,529)	(252,039)
Beginning balance (in shares) at Mar. 31, 2023		60,478
Beginning balance at Mar. 31, 2023	116,992	$ 605	396,403	(231)	(279,785)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)		150
Stock option exercises	4,693	$ 2	4,691
Vesting of restricted stock units (in shares)		203
Vesting of restricted stock units	2	$ 2
Issuance of common stock through employee stock purchase plan (in shares)		116
Issuance of common stock through employee stock purchase plan	5,291	$ 1	5,290
Acquisition of common stock for tax withholding obligations	(1,019)		(1,019)
Stock-based compensation	20,852		20,852
Other comprehensive loss	(1,298)			(1,298)
Net income attributable to BlackLine, Inc., including adjustment to redeemable non-controlling interest	30,849		3,103		27,746
Ending balance (in shares) at Jun. 30, 2023		60,947
Ending balance at Jun. 30, 2023	176,362	$ 610	429,320	(1,529)	(252,039)
Beginning balance (in shares) at Dec. 31, 2023		61,515
Beginning balance at Dec. 31, 2023	260,881	$ 615	474,863	205	(214,802)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)		122
Stock option exercises	2,633	$ 1	2,632
Vesting of restricted stock units (in shares)		439
Vesting of restricted stock units	5	$ 5
Issuance of common stock through employee stock purchase plan (in shares)		95
Issuance of common stock through employee stock purchase plan	4,249	$ 1	4,248
Acquisition of common stock for tax withholding obligations	(12,384)		(12,384)
Stock-based compensation	43,364		43,364
Purchase of capped calls	(59,738)		(59,738)
Other comprehensive loss	(766)			(766)
Net income attributable to BlackLine, Inc., including adjustment to redeemable non-controlling interest	87,519		(1,248)		88,767
Ending balance (in shares) at Jun. 30, 2024		62,171
Ending balance at Jun. 30, 2024	325,763	$ 622	451,737	(561)	(126,035)
Beginning balance (in shares) at Mar. 31, 2024		61,803
Beginning balance at Mar. 31, 2024	279,834	$ 618	480,175	(489)	(200,470)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)		94
Stock option exercises	2,322	$ 1	2,321
Vesting of restricted stock units (in shares)		179
Vesting of restricted stock units	2	$ 2
Issuance of common stock through employee stock purchase plan (in shares)		95
Issuance of common stock through employee stock purchase plan	4,249	$ 1	4,248
Acquisition of common stock for tax withholding obligations	(1,403)		(1,403)
Stock-based compensation	23,879		23,879
Purchase of capped calls	(59,738)		(59,738)
Other comprehensive loss	(72)			(72)
Net income attributable to BlackLine, Inc., including adjustment to redeemable non-controlling interest	76,690		2,255		74,435
Ending balance (in shares) at Jun. 30, 2024		62,171
Ending balance at Jun. 30, 2024	$ 325,763	$ 622	$ 451,737	$ (561)	$ (126,035)

CONDENSED CONSOLIDATED STATEM_5

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities
Net income attributable to BlackLine, Inc.	$ 87,519	$ 18,841
Net income and adjustment attributable to redeemable non-controlling interest (Note 3)	2,210	2,494
Net income	89,729	21,335
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	25,300	24,350
Change in fair value of contingent consideration	0	(22,429)
Amortization of debt issuance costs	2,679	2,741
Stock-based compensation	41,288	40,386
Gain on extinguishment of convertible senior notes	(65,112)	0
Noncash lease expense	3,110	3,192
Accretion of purchase discounts on marketable securities, net	(15,261)	(15,768)
Net foreign currency (gains) losses	(157)	902
Deferred income taxes	(1,255)	(52)
Provision for (benefit from) credit losses	7	(19)
Changes in operating assets and liabilities:
Accounts receivable	33,995	20,701
Prepaid expenses and other current assets	3,524	(3,956)
Other assets	1,609	395
Accounts payable	(6,543)	(6,082)
Accrued expenses and other current liabilities	(10,896)	(13,227)
Deferred revenue	(7,802)	1,025
Operating lease liabilities	(3,241)	(3,512)
Lease incentive receipts	0	240
Other long-term liabilities	149	(2,804)
Net cash provided by operating activities	91,123	47,418
Cash flows from investing activities
Purchases of marketable securities	(396,104)	(725,120)
Proceeds from maturities of marketable securities	591,500	693,300
Proceeds from sales of marketable securities	324,098	0
Capitalized software development costs	(12,087)	(12,318)
Purchases of property and equipment	(976)	(2,829)
Net cash provided by (used in) investing activities	506,431	(46,967)
Cash flows from financing activities
Proceeds from issuance of convertible senior notes, net of issuance costs	662,641	0
Partial repurchase of convertible senior notes	(848,519)	0
Purchase of capped calls related to convertible senior notes	(59,738)	0
Principal payments under finance lease obligations	(516)	(485)
Proceeds from exercises of stock options	2,638	11,920
Proceeds from employee stock purchase plan	4,249	5,291
Acquisition of common stock for tax withholding obligations	(12,384)	(13,422)
Net cash provided by (used in) financing activities	(251,629)	3,304
Effect of foreign currency exchange rate changes on cash, cash equivalents, and restricted cash	(421)	(207)
Net increase in cash, cash equivalents, and restricted cash	345,504	3,548
Cash, cash equivalents, and restricted cash, beginning of period	271,363	201,207
Cash, cash equivalents, and restricted cash, end of period	616,867	204,755
Reconciliation of cash, cash equivalents, and restricted cash to the consolidated balance sheets
Cash and cash equivalents at end of period	616,629	204,514
Restricted cash included within other assets at end of period	238	241
Total cash, cash equivalents, and restricted cash at end of period shown in the consolidated statements of cash flows	616,867	204,755
Non-cash financing and investing activities
Stock-based compensation capitalized for software development	2,079	1,818
Capitalized software development costs included in accounts payable and accrued expenses and other current liabilities at end of period	1,166	927
Purchases of property and equipment included in accounts payable and accrued expenses and other current liabilities at end of period	140	108
Leasehold improvements paid directly by landlord	0	271
Debt issuance costs included in accounts payable and accrued expenses at end of period	$ 663	$ 0

The Company

The Company	6 Months Ended
	Jun. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
The Company	The Company BlackLine, Inc. and its subsidiaries (the “Company” or “BlackLine”) provide financial accounting close solutions delivered primarily as Software as a Service (“SaaS”). The Company’s solutions enable its customers to address various aspects of their critical processes, including financial close, intercompany, invoice-to-cash, and consolidation. The Company is a holding company and conducts its operations through its wholly-owned subsidiary, BlackLine Systems, Inc. (“BlackLine Systems”). BlackLine Systems funded its business with investments from its founder and cash flows from operations until September 3, 2013, when the Company acquired BlackLine Systems, and Silver Lake Sumeru and Iconiq acquired a controlling interest in the Company, which is referred to as the “2013 Acquisition.” The Company is headquartered in Woodland Hills, California. The Company has other local offices in Pleasanton, California; New York, New York; and Westport, Connecticut, as well as international office locations in Australia, Canada, France, Germany, India, Japan, the Netherlands, Poland, Romania, Singapore, and the United Kingdom.

Basis of Presentation, Signific

Basis of Presentation, Significant Accounting Policies and Recently-Issued Accounting Pronouncements	6 Months Ended
	Jun. 30, 2024
Accounting Policies [Abstract]
Basis of Presentation, Significant Accounting Policies and Recently-Issued Accounting Pronouncements	Basis of Presentation, Significant Accounting Policies and Recently-Issued Accounting Pronouncements The accompanying unaudited condensed consolidated financial statements were prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information. Certain information and disclosures normally included in consolidated financial statements prepared in accordance with GAAP have been condensed or omitted. Accordingly, these unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the related notes included in the Annual Report on Form 10-K for the fiscal year ended December 31, 2023, which was filed with the Securities and Exchange Commission (“SEC”) on February 23, 2024. The unaudited condensed consolidated financial statements are unaudited and have been prepared on a basis consistent with that used to prepare the audited annual consolidated financial statements and include, in the opinion of management, all adjustments, consisting of normal and recurring items, necessary for the fair statement of the condensed consolidated financial statements. The unaudited condensed consolidated balance sheet at December 31, 2023 was derived from audited financial statements, but does not include all disclosures required by GAAP. The operating results for the quarter and six months ended June 30, 2024 are not necessarily indicative of the results expected for the full year ending December 31, 2024. Use of estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the dates of the consolidated financial statements, and the reported amounts of revenues and expenses during the reporting period. On an ongoing basis, management evaluates its estimates, primarily those related to determining the stand-alone selling price for separate deliverables in the Company’s subscription revenue arrangements, allowance for doubtful accounts, cancellations and credits, fair value of assets and liabilities assumed in a business combination, recoverability of goodwill and long-lived assets, useful lives associated with long-lived assets and right-of-use assets, income taxes, contingencies, fair value of contingent consideration, fair value of the 0.125% Convertible Senior Notes due in 2024, 0.00% Convertible Senior Notes due in 2026, and 1.00% Convertible Senior Notes due in 2029, redemption value of redeemable non-controlling interest, and the valuation and assumptions underlying stock-based compensation. These estimates are based on historical data and experience, as well as various other factors that management believes to be reasonable under the circumstances. Actual results could differ from those estimates. The Company assessed certain accounting matters that generally require consideration of forecasted financial information in context with the information reasonably available to the Company at June 30, 2024 and through the date of this report. The accounting matters assessed included, but were not limited to, the Company’s valuation of contingent consideration, the allowance for credit losses, and the carrying value of goodwill and other long-lived assets. While there was not a material impact to the Company’s condensed consolidated financial statements for the quarter and six months ended June 30, 2024, the Company’s future assessment of these accounting matters and other factors could result in material impacts to the Company’s consolidated financial statements in future reporting periods. Significant accounting policies The Company’s significant accounting policies are detailed in “Note 2 - Significant Accounting Policies” of the Company’s Annual Report on Form 10-K for the year ended December 31, 2023. There have been no material changes to the Company’s significant accounting policies. Recently-adopted accounting pronouncements There have been no recently adopted accounting pronouncements since the filing of the Company's Annual Report on Form 10-K for the year ended December 31, 2023. Recently-issued accounting pronouncements In November 2023, the FASB issued ASU No. 2023-07, Segment Reporting (Topic 280), Improvements to Reportable Segment Disclosures . This standard expands annual and interim disclosure requirements for reportable segments, primarily through enhanced disclosures about significant segment expenses. For public business entities, it is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. The Company is currently evaluating the impact that the updated standard will have on our disclosures within our consolidated financial statements. The Company does not intend to early adopt. In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740) , Improvements to Income Tax Disclosures , which requires that an entity, on an annual basis, disclose additional income tax information, primarily related to the rate reconciliation and income taxes paid. The amendment in the ASU is intended to enhance the transparency and decision usefulness of income tax disclosures. For public business entities, it is effective for annual periods beginning after December 15, 2024. The Company is currently evaluating the impact that the updated standard will have on our disclosures within our consolidated financial statements. The Company does not intend to early adopt.

Redeemable Non-Controlling Inte

Redeemable Non-Controlling Interest	6 Months Ended
	Jun. 30, 2024
Equity Method Investments and Joint Ventures [Abstract]
Redeemable Non-Controlling Interest	Redeemable Non-Controlling Interest In September 2018, the Company entered into an agreement with Japanese Cloud Computing and M30 LLC (the “Investors”) to engage in the investment, organization, management, and operation of BlackLine K.K. that is focused on the sale of the Company's products in Japan. The Company initially contributed approximately $4.5 million in cash in exchange for 51% of the outstanding common stock of BlackLine K.K. and subsequently invested a further $2.3 million, maintaining the Company's majority ownership of 51%. As the Company continues to control a majority stake in BlackLine K.K., the entity has been consolidated. All of the common stock held by the Investors is callable by the Company or puttable by the Investors upon certain contingent events. Should the call or put option be exercised, the redemption value will be determined based upon a prescribed formula derived from the discrete revenues of BlackLine K.K. and the Company, and may be settled, at the Company’s discretion, with Company stock or cash. As a result of the put right available to the Investors in the future, the redeemable non-controlling interest in BlackLine K.K. is classified outside of permanent equity in the Company’s consolidated balance sheets, and the balance is reported at the greater of the initial carrying amount adjusted for the redeemable non-controlling interest's share of earnings, or its estimated redemption value. The resulting changes in the estimated redemption amount are recorded within retained earnings or, in the absence of retained earnings, additional paid-in capital. Activity in the redeemable non-controlling interest was as follows (in thousands): Quarter Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Balance at beginning of period $ 33,900 $ 29,152 $ 30,063 $ 23,895 Net income attributable to redeemable non-controlling interest (excluding adjustment to non-controlling interest) 524 320 962 405 Foreign currency translation (101) (81) (205) (101) Adjustment to redeemable non-controlling interest (2,255) (3,103) 1,248 2,089 Balance at end of period $ 32,068 $ 26,288 $ 32,068 $ 26,288

Intangible Assets and Goodwill

Intangible Assets and Goodwill	6 Months Ended
	Jun. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets and Goodwill	Intangible Assets and Goodwill The carrying value of intangible assets was as follows (in thousands): June 30, 2024 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Trade name $ 15,977 $ (15,977) $ — Developed technology 137,368 (73,667) 63,701 Customer relationships 26,779 (22,808) 3,971 Defensive patent 2,333 (1,340) 993 $ 182,457 $ (113,792) $ 68,665 December 31, 2023 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Trade name $ 15,977 $ (15,977) $ — Developed technology 137,368 (66,900) 70,468 Customer relationships 26,779 (19,342) 7,437 Defensive patent 2,333 (1,182) 1,151 $ 182,457 $ (103,401) $ 79,056 The following table represents the changes in goodwill (in thousands): Balance at December 31, 2023 $ 448,965 Additions from acquisitions — Balance at June 30, 2024 $ 448,965

Balance Sheet Components

Balance Sheet Components	6 Months Ended
	Jun. 30, 2024
Balance Sheet Related Disclosures [Abstract]
Balance Sheet Components	Balance Sheet Components Investments in Marketable Securities Investments in marketable securities presented within current assets on the condensed consolidated balance sheets consisted of the following (in thousands): June 30, 2024 Amortized Gross Gross Fair Value Marketable securities U.S. treasury securities $ 275,644 $ — $ (109) $ 275,535 Commercial paper 110,178 — (2) 110,176 U.S. government agencies 42,795 — (45) 42,750 $ 428,617 $ — $ (156) $ 428,461 December 31, 2023 Amortized Gross Gross Fair Value Marketable securities U.S. treasury securities $ 523,344 $ 737 $ (107) $ 523,974 Commercial paper 241,428 1 — 241,429 U.S. government agencies 168,078 2 (128) 167,952 $ 932,850 $ 740 $ (235) $ 933,355 The Company’s marketable securities as of June 30, 2024 have a contractual maturity of less than two years. All of our available-for-sale securities are available for use in our current operations and are categorized as current assets even though the stated maturity of some individual securities may be one year or more beyond the balance sheet date. The fair values of available-for-sale securities, by remaining contractual maturity, were as follows (in thousands): June 30, 2024 Amortized Cost Fair Value Maturing within 1 year $ 416,618 $ 416,475 Maturing between 1 and 2 years 11,999 11,986 $ 428,617 $ 428,461 Refer to “Note 6 - Fair Value Measurements” for additional information. The Company recognized accretion on its marketable securities in interest income, and also recognized net gains and losses related to maturities of marketable securities that were reclassified from accumulated other comprehensive loss in interest income, which totaled $6.7 million and $15.3 million for the quarter and six months ended June 30, 2024, and $8.3 million and $15.8 million for the quarter and six months ended June 30, 2023, respectively. Net gains and losses are determined using the specific identification method. During the quarters and six months ended June 30, 2024 and 2023, there were nominal realized gains and losses related to sales of marketable securities recognized in the Company's accompanying condensed consolidated statements of operations. Marketable securities in a continuous loss position for less than 12 months had an estimated fair value of $308.7 million and $286.6 million, and unrealized losses of $0.2 million and $0.2 million, at June 30, 2024 and December 31, 2023, respectively. There were no marketable securities in a continuous loss position for greater than 12 months at June 30, 2024 and December 31, 2023, respectively. The Company's marketable securities are considered to be of high credit quality and accordingly, there was no allowance for credit losses related to marketable securities as of June 30, 2024 or December 31, 2023. Other Assets Deferred customer contract acquisition costs are included in other assets in the accompanying condensed consolidated balance sheets and totaled $87.1 million and $89.9 million at June 30, 2024 and December 31, 2023, respectively. Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities were comprised of the following (in thousands): June 30, December 31, Accrued salaries and employee benefits $ 27,468 $ 33,344 Accrued income and other taxes payable 9,942 9,408 Accrued restructuring costs 796 1,569 Other accrued expenses and current liabilities 13,718 15,369 $ 51,924 $ 59,690

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2024
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The following table summarizes the Company’s financial assets and liabilities measured at fair value on a recurring basis by level, within the fair value hierarchy. Financial assets and financial liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement (in thousands): June 30, 2024 Level 1 Level 2 Level 3 Total Cash equivalents U.S. treasury securities $ 105,687 $ — $ — $ 105,687 Money market funds 437,369 — — 437,369 Commercial paper — — — — Marketable securities U.S. treasury securities 275,535 — — 275,535 Commercial paper — 110,176 — 110,176 U.S. government agencies — 42,750 — 42,750 Total assets $ 818,591 $ 152,926 $ — $ 971,517 Liabilities Contingent consideration $ — $ — $ — $ — Total liabilities $ — $ — $ — $ — December 31, 2023 Level 1 Level 2 Level 3 Total Cash equivalents Money market funds $ 148,298 $ — $ — $ 148,298 Commercial paper — 38,926 — 38,926 U.S. government agencies — 19,987 — 19,987 Marketable securities U.S. treasury securities 523,974 — — 523,974 Commercial paper — 241,429 — 241,429 U.S. government agencies — 167,952 — 167,952 Total assets $ 672,272 $ 468,294 $ — $ 1,140,566 Liabilities Contingent consideration $ — $ — $ — $ — Total liabilities $ — $ — $ — $ — The following table summarizes the changes in the contingent consideration liability (in thousands): Quarter Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Beginning fair value $ — $ 44,655 $ — $ 41,549 Additions in the period — — — — Change in fair value — (25,535) — (22,429) Ending fair value $ — $ 19,120 $ — $ 19,120 The Company classified the marketable debt securities as available-for-sale debt securities at the time of purchase and reevaluated such classification as of each balance sheet date. The valuation techniques used to measure the fair values of our instruments that were classified as Level 1 were derived from quoted market prices for identical instruments in active markets. The valuation techniques used to measure the fair values of Level 2 instruments were derived from broker reports that utilized quoted market prices for similar instruments. As a condition of the acquisition of FourQ Systems, Inc. (“FourQ”) that occurred on January 26, 2022, the Company agreed to pay additional cash consideration if FourQ realized certain firm-specific targets, including the amount and timing of new and incremental combined bookings from FourQ and BlackLine, and revenues from a specified FourQ customer over a three-year period subsequent to the acquisition date. The maximum cash consideration to be distributed is $73.2 million. Changes in the significant inputs used in the fair value measurement, specifically a change in new and incremental actual and forecasted combined bookings from FourQ and the Company, can significantly impact the fair value of the contingent consideration liability. At June 30, 2024, the related liability for the FourQ Acquisition was zero. Increases and decreases in the fair value of contingent consideration are recorded as expense or reversals of expense, respectively, within general and administrative expenses in the unaudited condensed consolidated statements of operations.

Convertible Senior Notes

Convertible Senior Notes	6 Months Ended
	Jun. 30, 2024
Debt Disclosure [Abstract]
Convertible Senior Notes	Convertible Senior Notes 2024 Notes As of June 30, 2024, the Company had $250.0 million aggregate principal amount of our 0.125% Convertible Senior Notes due in 2024 (the “2024 Notes”) outstanding. On August 1, 2024, the scheduled maturity date of the 2024 Notes, the Company repaid the total outstanding $250.0 million aggregate principal amount of the 2024 Notes with cash on hand. Refer to Note 15 - “Subsequent Events,” for further discussion on the repayment. As of June 30, 2024, the 2024 Notes consisted of the following (in thousands): June 30, December 31, Liability: Principal $ 250,000 $ 250,000 Unamortized debt issuance costs (112) (767) Net carrying amount (1) $ 249,888 $ 249,233 (1) Net carrying amount as of June 30, 2024 presented within total current liabilities on the condensed consolidated balance sheet. The effective interest rate of the 2024 Notes, excluding the conversion option, was 0.65%. The Company carried the 2024 Notes at face value less unamortized debt issuance costs on the accompanying condensed consolidated balance sheets and presents the fair value for disclosure purposes only. The estimated fair value was determined based on the actual bids and offers of the 2024 Notes in an over-the-counter market on the last trading day of the period. The estimated fair value of the 2024 Notes, based on a market approach at June 30, 2024, was approximately $226.9 million, which represents a Level 2 valuation. During the quarter ended June 30, 2024, the Company recognized $0.3 million of interest expense related to the amortization of debt issuance costs and $0.1 million of coupon interest expense. During the quarter ended June 30, 2023, the Company recognized $0.3 million of interest expense related to the amortization of debt issuance costs and $0.1 million of coupon interest expense. During the six months ended June 30, 2024, the Company recognized $0.7 million of interest expense related to the amortization of debt issuance costs and $0.2 million of coupon interest expense. During the six months ended June 30, 2023, the Company recognized $0.6 million of interest expense related to the amortization of debt issuance costs and $0.2 million of coupon interest expense. The 2024 Notes were convertible at June 30, 2024 and remained convertible until the close of business on the second scheduled trading day immediately preceding the maturity date. In connection with the offering of the 2024 Notes, the Company entered into privately negotiated capped call transactions (the “2024 Capped Calls”). There have been no changes to the condition of the 2024 Capped Calls since December 31, 2023, and the 2024 Capped Calls were still outstanding as of June 30, 2024. 2026 Notes In connection with the issuance of the 2029 convertible senior notes in May 2024 (see “2029 Notes” below), the Company used approximately $662.6 million of the net proceeds from the offering of the 2029 Notes, as well as liquid investments on hand of $185.9 million to repurchase $919.8 million aggregate principal amount of the outstanding 2026 Notes (the “2026 Notes”). The difference between the consideration paid and the carrying value of the repurchased 2026 Notes, inclusive of any unamortized debt issuance costs, was recognized as a gain on extinguishment of $65.1 million in other income in the unaudited condensed consolidated statement of operations for the quarter and six months ended June 30, 2024. As of June 30, 2024, the Company had $230.2 million aggregate principal amount of our 0.00% 2026 Notes outstanding. The 2026 Notes consisted of the following (in thousands): June 30, December 31, Liability: Principal $ 230,196 $ 1,150,000 Unamortized debt issuance costs (1,457) (9,392) Net carrying amount $ 228,739 $ 1,140,608 The effective interest rate of the 2026 Notes, excluding the conversion option, was 0.37%. The Company carries the 2026 Notes at face value less unamortized debt issuance costs on the accompanying condensed consolidated balance sheets and presents the fair value for disclosure purposes only. The estimated fair value was determined based on the actual bids and offers of the 2026 Notes in an over-the-counter market on the last trading day of the period. The estimated fair value of the 2026 Notes, based on a market approach at June 30, 2024, was approximately $210.8 million, which represents a Level 2 valuation. During the quarter and six months ended June 30, 2024 the Company recognized interest expense related to the amortization of debt issuance costs of $0.7 million and $1.8 million, respectively. During the quarter and six months ended June 30, 2023, the Company recognized interest expense related to the amortization of debt issuance costs of $1.1 million and $2.1 million, respectively. The 2026 Notes were not convertible at June 30, 2024. It is the Company’s current intent to settle conversions of the 2026 Notes through “combination settlement”, which involves repayment of the principal portion in cash and any excess of the conversion value over the principal amount in shares, cash, or a combination for any further value. In connection with the offering of the 2026 Notes, the Company entered into privately negotiated capped call transactions (the “2026 Capped Calls”). Apart from the partial extinguishment, there have been no changes to the condition of the 2026 Notes since December 31, 2023, and the 2026 Capped Calls were unchanged and still outstanding as of June 30, 2024. 2029 Notes On May 24, 2024 and June 5, 2024, the Company issued $600.0 million aggregate principal amount, and additional aggregate principal amount in connection with the initial purchasers’ option of $75.0 million, respectively, of 1.00% Convertible Senior Notes due 2029 (the “2029 Notes” and, together with the 2024 Notes and the 2026 Notes, the “Notes”), in a private placement to qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933 (the “Securities Act”). The 2029 Notes were sold to the initial purchasers pursuant to an exemption from the registration requirements of the Securities Act afforded by Section 4(a)(2) of the Securities Act. The 2029 Notes were issued pursuant to an indenture (the “2029 Indenture”), by and between the Company and U.S. Bank Trust Company, National Association, as trustee (the “Trustee”). Interest on the 2029 Notes is payable semi-annually in cash at a rate of 1.00% per annum on June 1 and December 1 of each year, beginning on December 1, 2024. The 2029 Notes will mature on June 1, 2029, unless redeemed, repurchased, or converted prior to such date in accordance with their terms. The initial conversion rate of the 2029 Notes is 14.6047 shares of common stock per $1,000 principal amount of the 2029 Notes, equivalent to an initial conversion price of approximately $68.47 per share of common stock. The conversion rate is subject to adjustment for certain events. Upon conversion, the Company will pay, or deliver, as the case may be, cash, shares of its common stock or a combination of cash and shares of its common stock, at its election. It is the Company’s current intent to settle conversions of the 2029 Notes through “combination settlement”, which involves repayment of the principal portion in cash and any excess of the conversion value over the principal amount in shares, cash, or a combination for any further value. Prior to the close of business on the business day immediately preceding March 1, 2029, the 2029 Notes will be convertible only under the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on September 30, 2024, and only during such calendar quarter, if the last reported sale price of the Common Stock for at least 20 trading days (whether or not consecutive) in a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price for the 2029 Notes on each applicable trading day; (2) during the five business-day period after any five consecutive trading-day period in which the trading price per $1,000 principal amount of 2029 Notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of the Common Stock and the conversion rate on each such trading day; (3) if the Company calls any or all of the 2029 Notes for redemption, at any time prior to the close of business on the second scheduled trading day immediately preceding the redemption date; or (4) upon the occurrence of specified corporate events set forth in the 2029 Indenture. If the Company undergoes a fundamental change, as described in the 2029 Indenture, prior to the maturity date, holders may require the Company to repurchase all or a portion of the 2029 Notes for cash at a price equal to 100% of the principal amount of the 2029 Notes to be repurchased, plus any accrued and unpaid special interest, if any, to, but excluding, the fundamental change repurchase date. The 2029 Notes are the Company’s senior unsecured obligations and will rank senior in right of payment to any of the Company’s indebtedness that is expressly subordinated in right of payment to the 2029 Notes; equal in right of payment to any of the Company’s unsecured indebtedness that is not so subordinated; effectively junior in right of payment to any of the Company’s secured indebtedness to the extent of the value of the assets securing such indebtedness; and structurally junior to all indebtedness and other liabilities (including trade payables) of current or future subsidiaries of the Company. The 2029 Indenture contains customary events of default with respect to the 2029 Notes and provides that upon certain events of default occurring and continuing, the Trustee may, and the Trustee at the request of holders of at least 25% in principal amount of the 2029 Notes shall, declare all principal and accrued and unpaid interest, if any, of the 2029 Notes to be due and payable. In case of certain events of bankruptcy, insolvency or reorganization, involving the Company, all of the principal of, and accrued and unpaid interest on the 2029 Notes will automatically become due and payable. The 2029 Notes consisted of the following (in thousands): June 30, December 31, Liability: Principal $ 675,000 $ — Unamortized debt issuance costs (12,760) — Net carrying amount $ 662,240 $ — The effective interest rate of the 2029 Notes, excluding the conversion option, was 1.40%. The Company carries the 2029 Notes at face value less unamortized debt issuance costs on the accompanying condensed consolidated balance sheets and presents the fair value for disclosure purposes only. The estimated fair value was determined based on the actual bids and offers of the 2029 Notes in an over-the-counter market on the last trading day of the period. The estimated fair value of the 2029 Notes, based on a market approach at June 30, 2024, was approximately $653.2 million, which represents a Level 2 valuation. During the quarter and six months ended June 30, 2024 the Company recognized $0.3 million and $0.7 million of coupon interest expense related to the amortization of debt issuance costs. The 2029 Notes were not convertible at June 30, 2024. In connection with the offering of the 2029 Notes, the Company entered into capped call transactions (the “2029 Capped Calls” and together with the 2024 and 2026 Capped Calls, the “Capped Calls”) with certain counterparties at a cost of approximately $59.7 million, which was recorded as a reduction of the Company’s additional paid-in capital in the accompanying unaudited condensed consolidated financial statements. Under the 2029 Capped Calls, the Company purchased capped call options that initially cover in the aggregate the total number of shares of the Company’s common stock that initially underlie the 2029 Notes, with an exercise price equal to the initial conversion price of the 2029 Notes, and a cap price of $92.17 per share of common stock, subject to certain adjustments under the terms of the 2029 Capped Calls. By entering into the 2029 Capped Calls, the Company expects to reduce the potential dilution to its common stock upon any conversion of the 2029 Notes (or, in the event a conversion of the 2029 Notes is settled in cash, to reduce its cash payment obligation) in the event that at the time of conversion of the 2029 Notes, the market value per share of its common stock exceeds the conversion price of the 2029 Notes, with such reduction subject to the cap price. The cost of the 2029 Capped Calls is not expected to be tax deductible as the Company did not elect to integrate the 2029 Capped Calls into the 2029 Notes for tax purposes.

Restructuring Costs

Restructuring Costs	6 Months Ended
	Jun. 30, 2024
Restructuring and Related Activities [Abstract]
Restructuring Costs	Restructuring Costs The liability for the fiscal 2023 and 2022 restructuring programs was included in accrued expenses and other current liabilities in the condensed consolidated balance sheet, and the following tables summarize the related activity for the respective plans for the quarter and six months ended June 30, 2024 (in thousands): Quarter Ended June 30, 2024 Restructuring Program Fiscal 2023 Fiscal 2022 Total Accrual balance as of March 31, 2024 $ 624 $ 3 $ 627 Restructuring charges 928 — 928 Cash payments and adjustments (756) (3) (759) Accrual balance as of June 30, 2024 $ 796 $ — $ 796 Six Months Ended June 30, 2024 Restructuring Program Fiscal 2023 Fiscal 2022 Total Accrual balance as of December, 31, 2023 $ 1,562 $ 7 $ 1,569 Restructuring charges 1,372 — 1,372 Cash payments and adjustments (2,138) (7) (2,145) Accrual balance as of June 30, 2024 $ 796 $ — $ 796 All plan adjustments were changes in estimates whereby increases and decreases in charges were generally recorded to operating expenses in the periods of adjustments. As of June 30, 2024, the Company incurred cumulative costs of $11.2 million and $5.0 million related to the fiscal 2023 restructuring program and fiscal 2022 restructuring program, respectively. The Company does not anticipate incurring material additional expenses.

Equity Awards

Equity Awards	6 Months Ended
	Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]
Equity Awards	Equity Awards Stock-based compensation expense Stock-based compensation expense was as follows (in thousands): Quarter Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Cost of revenues $ 2,973 $ 2,770 $ 4,935 $ 5,122 Sales and marketing 6,629 6,182 12,423 12,665 Research and development 3,499 3,708 6,350 7,532 General and administrative 9,625 7,288 17,580 15,067 $ 22,726 $ 19,948 $ 41,288 $ 40,386 For the quarters ended June 30, 2024 and 2023, stock-based compensation capitalized as an asset was $1.2 million and $1.0 million, respectively. For the six months ended June 30, 2024 and 2023, stock-based compensation capitalized as an asset was $2.1 million and $1.8 million, respectively. Stock options - service-only vesting conditions The following table summarizes activity for awards that contain service-only vesting conditions (in thousands): Outstanding at December 31, 2023 1,693 Granted — Exercised (131) Forfeited/canceled (60) Outstanding at June 30, 2024 1,502 Restricted stock units - service-only vesting conditions The following table summarizes activity for restricted stock units that contain service-only vesting conditions (in thousands): Nonvested at December 31, 2023 2,208 Granted 1,603 Vested (597) Forfeited/canceled (207) Nonvested at June 30, 2024 3,007 Restricted stock units - performance and service conditions The following table summarizes activity for restricted stock units with performance and service vesting conditions with grant dates established (in thousands): Nonvested at December 31, 2023 113 Granted 206 Performance adjustment (62) Vested (51) Forfeited/canceled (8) Nonvested at June 30, 2024 198 The following table summarizes activity for restricted stock units with performance and service vesting conditions with no grant dates established (in thousands): Nonvested at December 31, 2023 235 Granted 147 Accounting grant dates established (133) Vested — Forfeited/canceled (5) Nonvested at June 30, 2024 244 Restricted stock units - market and service conditions The following table summarizes activity for restricted stock units with market and service-based conditions (in thousands): Nonvested at December 31, 2023 — Granted 202 Vested — Forfeited/canceled — Nonvested at June 30, 2024 202

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2024
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes In determining quarterly provisions for income taxes, the Company uses the annual estimated effective tax rate applied to the actual year-to-date income (loss), adjusted for discrete items arising in that quarter. The Company’s annual estimated effective tax rate differs from the U.S. federal statutory rate of 21% primarily as a result of state taxes, foreign taxes, and changes in the Company’s valuation allowance for income taxes. For the quarters ended June 30, 2024 and 2023, the Company recorded $4.3 million and $0.9 million in income tax expense, respectively. For the six months ended June 30, 2024 and 2023, the Company recorded $5.2 million and $1.6 million in income tax expense, respectively. The increase in income tax expense for both the quarter and six months ended June 30, 2024 compared to the quarter and six months ended June 30, 2023, resulted primarily from $3.0 million tax expense associated with the gain on the partial extinguishment of the 2026 Notes, along with changes in the mix of profitable foreign jurisdictions. For purposes of calculating its income tax attributed to continuing operations, the Company continued to maintain a full valuation allowance on its U.S. federal and state net deferred tax assets as it was more likely than not that those deferred tax assets will not be realized. However, given the Company's recent earnings, the Company believes that there is a reasonable possibility that, in the near term, sufficient positive evidence may become available that supports the release of a portion of the Company's valuation allowance, which would result in the recognition of certain U.S. deferred tax assets and a decrease to income tax expense for the period in which the release is recorded. The exact timing and amount of the valuation allowance release would be subject to change based on the level of profitability that the Company can achieve.

Net Income per Share

Net Income per Share	6 Months Ended
	Jun. 30, 2024
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 (in thousands, except per share amounts): Quarter Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Basic net income per share Numerator: Net income attributable to BlackLine, Inc. $ 76,690 $ 30,849 $ 87,519 $ 18,841 Denominator: Weighted average shares 61,979 60,700 61,811 60,445 Basic net income per share attributable to BlackLine, Inc. $ 1.24 $ 0.51 $ 1.42 $ 0.31 Diluted net income per share Numerator: Net income attributable to BlackLine, Inc. $ 76,690 $ 30,849 $ 87,519 $ 18,841 Interest expense, net of taxes 1,707 1,458 3,101 2,897 Gain on extinguishment of convertible senior notes, net of taxes (62,147) — (62,147) — Net income attributable to BlackLine, Inc. for diluted calculation $ 16,250 $ 32,307 $ 28,473 $ 21,738 Denominator: Weighted average shares 61,979 60,700 61,811 60,445 Dilutive effect of securities 635 777 781 1,032 Dilutive effect of convertible senior notes 9,908 10,324 10,116 10,324 Shares used to calculate diluted net income per share 72,522 71,801 72,708 71,801 Diluted net income per share attributable to BlackLine, Inc. $ 0.22 $ 0.45 $ 0.39 $ 0.30 The weighted average impact of potentially dilutive securities that were excluded from the diluted per share calculations because they were anti-dilutive were as follows (in thousands): Quarter Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Stock options - service-only vesting conditions 511 695 350 1,532 Restricted stock units - service-only vesting conditions 2,478 2,330 1,926 2,335 Restricted stock units - performance and service conditions 64 — 36 32 Restricted stock units - market and service conditions 181 — 103 — Restricted stock units - performance, market, and service conditions — 139 — 147 Total shares excluded from net income per share 3,234 3,164 2,415 4,046 For the quarter and six months ended June 30, 2024, the Capped Calls impact the number of shares that may be issued, up to approximately 4.7 million shares, 2.0 million shares, and 12.8 million for the 2024 Notes, 2026 Notes, and 2029 Notes, respectively, if certain corporate events occur prior to the maturity dates or if the Company issues a notice of redemption. For the quarter and six months ended June 30, 2023, the Capped Calls impact the number of shares that may be issued, up to approximately 4.7 million shares and 9.9 million shares for the 2024 Notes and 2026 Notes, respectively, if certain corporate events occur prior to the maturity dates or if the Company issues a notice of redemption.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Litigation —From time to time, the Company may become subject to legal proceedings, claims and litigation arising in the ordinary course of business. The Company is not currently a party to any legal proceedings, nor is it aware of any pending or threatened litigation that would have a material adverse effect on the Company’s business, operating results, cash flows, or financial condition should such litigation be resolved unfavorably. Indemnification —In the ordinary course of business, the Company may provide indemnification of varying scope and terms to customers, vendors, investors, directors, and officers with respect to certain matters, including, but not limited to, losses arising out of its breach of such agreements, services to be provided by the Company, or from intellectual property infringement claims made by third parties. These indemnification provisions may survive termination of the underlying agreement and the maximum potential amount of future payments the Company could be required to make under these indemnification provisions may not be subject to maximum loss clauses. The maximum potential amount of future payments the Company could be required to make under these indemnification provisions is indeterminable. The Company has never paid a material claim, nor has it been sued in connection with these indemnification arrangements. At June 30, 2024 and December 31, 2023, the Company has not accrued a liability for these indemnification arrangements because the likelihood of incurring a payment obligation, if any, in connection with these indemnification arrangements was not probable or reasonably estimable.

Unearned Revenue and Performanc

Unearned Revenue and Performance Obligations	6 Months Ended
	Jun. 30, 2024
Unearned Revenue And Performance Obligations [Abstract]
Unearned Revenue and Performance Obligations	Unearned Revenue and Performance Obligations Revenue totaling $217.5 million and $195.2 million was recognized during the six months ended June 30, 2024 and 2023, respectively, that was previously included in the deferred revenue balance at December 31, 2023 and 2022, respectively. Contracted but unrecognized revenue was $847.8 million at June 30, 2024, of which the Company expects to recognize approximately 57% over the next 12 months and the remainder thereafter.

Geographic Information

Geographic Information	6 Months Ended
	Jun. 30, 2024
Segment Reporting [Abstract]
Geographic Information	Geographic Information The Company disaggregates its revenue from contracts with customers by geographic location, as it believes it best depicts how the nature, amount, timing, and uncertainty of its revenues and cash flows are affected by economic factors. The following table sets forth the Company’s revenues by geographic region (in thousands): Quarter Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 United States $ 112,836 $ 104,052 $ 224,243 $ 204,064 International 47,670 40,522 93,724 79,494 $ 160,506 $ 144,574 $ 317,967 $ 283,558

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2024
Subsequent Events [Abstract]
Subsequent Events	Subsequent EventsOn August 1, 2024, the Company repaid the total outstanding $250.0 million aggregate principal amount and related $0.2 million of accrued interest pursuant to the terms of the 2024 Notes with existing cash on hand. Upon repayment, the 2024 Capped Calls expired.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Pay vs Performance Disclosure
Net income (loss) attributable to BlackLine, Inc.	$ 76,690	$ 30,849	$ 87,519	$ 18,841

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Jun. 30, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Basis of Presentation, Signif_2

Basis of Presentation, Significant Accounting Policies and Recently-Issued Accounting Pronouncements (Policies)	6 Months Ended
	Jun. 30, 2024
Accounting Policies [Abstract]
Use of estimates	Use of estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the dates of the consolidated financial statements, and the reported amounts of revenues and expenses during the reporting period. On an ongoing basis, management evaluates its estimates, primarily those related to determining the stand-alone selling price for separate deliverables in the Company’s subscription revenue arrangements, allowance for doubtful accounts, cancellations and credits, fair value of assets and liabilities assumed in a business combination, recoverability of goodwill and long-lived assets, useful lives associated with long-lived assets and right-of-use assets, income taxes, contingencies, fair value of contingent consideration, fair value of the 0.125% Convertible Senior Notes due in 2024, 0.00% Convertible Senior Notes due in 2026, and 1.00% Convertible Senior Notes due in 2029, redemption value of redeemable non-controlling interest, and the valuation and assumptions underlying stock-based compensation. These estimates are based on historical data and experience, as well as various other factors that management believes to be reasonable under the circumstances. Actual results could differ from those estimates. The Company assessed certain accounting matters that generally require consideration of forecasted financial information in context with the information reasonably available to the Company at June 30, 2024 and through the date of this report. The accounting matters assessed included, but were not limited to, the Company’s valuation of contingent consideration, the allowance for credit losses, and the carrying value of goodwill and other long-lived assets. While there was not a material impact to the Company’s condensed consolidated financial statements for the quarter and six months ended June 30, 2024, the Company’s future assessment of these accounting matters and other factors could result in material impacts to the Company’s consolidated financial statements in future reporting periods.
Recently-adopted accounting pronouncements and Recently-issued accounting pronouncements	Recently-adopted accounting pronouncements There have been no recently adopted accounting pronouncements since the filing of the Company's Annual Report on Form 10-K for the year ended December 31, 2023. Recently-issued accounting pronouncements In November 2023, the FASB issued ASU No. 2023-07, Segment Reporting (Topic 280), Improvements to Reportable Segment Disclosures . This standard expands annual and interim disclosure requirements for reportable segments, primarily through enhanced disclosures about significant segment expenses. For public business entities, it is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. The Company is currently evaluating the impact that the updated standard will have on our disclosures within our consolidated financial statements. The Company does not intend to early adopt. In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740) , Improvements to Income Tax Disclosures , which requires that an entity, on an annual basis, disclose additional income tax information, primarily related to the rate reconciliation and income taxes paid. The amendment in the ASU is intended to enhance the transparency and decision usefulness of income tax disclosures. For public business entities, it is effective for annual periods beginning after December 15, 2024. The Company is currently evaluating the impact that the updated standard will have on our disclosures within our consolidated financial statements. The Company does not intend to early adopt.

Redeemable Non-Controlling In_2

Redeemable Non-Controlling Interest (Tables)	6 Months Ended
	Jun. 30, 2024
Equity Method Investments and Joint Ventures [Abstract]
Schedule of Redeemable Non-Controlling Interest	Activity in the redeemable non-controlling interest was as follows (in thousands): Quarter Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Balance at beginning of period $ 33,900 $ 29,152 $ 30,063 $ 23,895 Net income attributable to redeemable non-controlling interest (excluding adjustment to non-controlling interest) 524 320 962 405 Foreign currency translation (101) (81) (205) (101) Adjustment to redeemable non-controlling interest (2,255) (3,103) 1,248 2,089 Balance at end of period $ 32,068 $ 26,288 $ 32,068 $ 26,288

Intangible Assets and Goodwill

Intangible Assets and Goodwill (Tables)	6 Months Ended
	Jun. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Carrying Value of Intangible Assets	The carrying value of intangible assets was as follows (in thousands): June 30, 2024 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Trade name $ 15,977 $ (15,977) $ — Developed technology 137,368 (73,667) 63,701 Customer relationships 26,779 (22,808) 3,971 Defensive patent 2,333 (1,340) 993 $ 182,457 $ (113,792) $ 68,665 December 31, 2023 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Trade name $ 15,977 $ (15,977) $ — Developed technology 137,368 (66,900) 70,468 Customer relationships 26,779 (19,342) 7,437 Defensive patent 2,333 (1,182) 1,151 $ 182,457 $ (103,401) $ 79,056
Schedule of Changes in Goodwill	The following table represents the changes in goodwill (in thousands): Balance at December 31, 2023 $ 448,965 Additions from acquisitions — Balance at June 30, 2024 $ 448,965

Balance Sheet Components (Table

Balance Sheet Components (Tables)	6 Months Ended
	Jun. 30, 2024
Balance Sheet Related Disclosures [Abstract]
Schedule of Investments in Marketable Securities	Investments in marketable securities presented within current assets on the condensed consolidated balance sheets consisted of the following (in thousands): June 30, 2024 Amortized Gross Gross Fair Value Marketable securities U.S. treasury securities $ 275,644 $ — $ (109) $ 275,535 Commercial paper 110,178 — (2) 110,176 U.S. government agencies 42,795 — (45) 42,750 $ 428,617 $ — $ (156) $ 428,461 December 31, 2023 Amortized Gross Gross Fair Value Marketable securities U.S. treasury securities $ 523,344 $ 737 $ (107) $ 523,974 Commercial paper 241,428 1 — 241,429 U.S. government agencies 168,078 2 (128) 167,952 $ 932,850 $ 740 $ (235) $ 933,355
Schedule of Fair Values of Available-for-Sale Securities, by Remaining Contractual Maturity	The fair values of available-for-sale securities, by remaining contractual maturity, were as follows (in thousands): June 30, 2024 Amortized Cost Fair Value Maturing within 1 year $ 416,618 $ 416,475 Maturing between 1 and 2 years 11,999 11,986 $ 428,617 $ 428,461
Schedule of Accrued Expenses and Other Current Liabilities	Accrued expenses and other current liabilities were comprised of the following (in thousands): June 30, December 31, Accrued salaries and employee benefits $ 27,468 $ 33,344 Accrued income and other taxes payable 9,942 9,408 Accrued restructuring costs 796 1,569 Other accrued expenses and current liabilities 13,718 15,369 $ 51,924 $ 59,690

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2024
Fair Value Disclosures [Abstract]
Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis	The following table summarizes the Company’s financial assets and liabilities measured at fair value on a recurring basis by level, within the fair value hierarchy. Financial assets and financial liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement (in thousands): June 30, 2024 Level 1 Level 2 Level 3 Total Cash equivalents U.S. treasury securities $ 105,687 $ — $ — $ 105,687 Money market funds 437,369 — — 437,369 Commercial paper — — — — Marketable securities U.S. treasury securities 275,535 — — 275,535 Commercial paper — 110,176 — 110,176 U.S. government agencies — 42,750 — 42,750 Total assets $ 818,591 $ 152,926 $ — $ 971,517 Liabilities Contingent consideration $ — $ — $ — $ — Total liabilities $ — $ — $ — $ — December 31, 2023 Level 1 Level 2 Level 3 Total Cash equivalents Money market funds $ 148,298 $ — $ — $ 148,298 Commercial paper — 38,926 — 38,926 U.S. government agencies — 19,987 — 19,987 Marketable securities U.S. treasury securities 523,974 — — 523,974 Commercial paper — 241,429 — 241,429 U.S. government agencies — 167,952 — 167,952 Total assets $ 672,272 $ 468,294 $ — $ 1,140,566 Liabilities Contingent consideration $ — $ — $ — $ — Total liabilities $ — $ — $ — $ —
Schedule of Changes in Common Stock Warrant Liability and Contingent Consideration Liability	The following table summarizes the changes in the contingent consideration liability (in thousands): Quarter Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Beginning fair value $ — $ 44,655 $ — $ 41,549 Additions in the period — — — — Change in fair value — (25,535) — (22,429) Ending fair value $ — $ 19,120 $ — $ 19,120

Convertible Senior Notes (Table

Convertible Senior Notes (Tables)	6 Months Ended
	Jun. 30, 2024
Debt Disclosure [Abstract]
Schedule of Notes	As of June 30, 2024, the 2024 Notes consisted of the following (in thousands): June 30, December 31, Liability: Principal $ 250,000 $ 250,000 Unamortized debt issuance costs (112) (767) Net carrying amount (1) $ 249,888 $ 249,233 (1) Net carrying amount as of June 30, 2024 presented within total current liabilities on the condensed consolidated balance sheet. June 30, December 31, Liability: Principal $ 230,196 $ 1,150,000 Unamortized debt issuance costs (1,457) (9,392) Net carrying amount $ 228,739 $ 1,140,608 The 2029 Notes consisted of the following (in thousands): June 30, December 31, Liability: Principal $ 675,000 $ — Unamortized debt issuance costs (12,760) — Net carrying amount $ 662,240 $ —

Restructuring Costs (Tables)

Restructuring Costs (Tables)	6 Months Ended
	Jun. 30, 2024
Restructuring and Related Activities [Abstract]
Schedule of Restructuring Liability	The liability for the fiscal 2023 and 2022 restructuring programs was included in accrued expenses and other current liabilities in the condensed consolidated balance sheet, and the following tables summarize the related activity for the respective plans for the quarter and six months ended June 30, 2024 (in thousands): Quarter Ended June 30, 2024 Restructuring Program Fiscal 2023 Fiscal 2022 Total Accrual balance as of March 31, 2024 $ 624 $ 3 $ 627 Restructuring charges 928 — 928 Cash payments and adjustments (756) (3) (759) Accrual balance as of June 30, 2024 $ 796 $ — $ 796 Six Months Ended June 30, 2024 Restructuring Program Fiscal 2023 Fiscal 2022 Total Accrual balance as of December, 31, 2023 $ 1,562 $ 7 $ 1,569 Restructuring charges 1,372 — 1,372 Cash payments and adjustments (2,138) (7) (2,145) Accrual balance as of June 30, 2024 $ 796 $ — $ 796

Equity Awards (Tables)

Equity Awards (Tables)	6 Months Ended
	Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]
Schedule of Stock-Based Compensation Expense	Stock-based compensation expense was as follows (in thousands): Quarter Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Cost of revenues $ 2,973 $ 2,770 $ 4,935 $ 5,122 Sales and marketing 6,629 6,182 12,423 12,665 Research and development 3,499 3,708 6,350 7,532 General and administrative 9,625 7,288 17,580 15,067 $ 22,726 $ 19,948 $ 41,288 $ 40,386
Schedule of Stock Options Activity	The following table summarizes activity for awards that contain service-only vesting conditions (in thousands): Outstanding at December 31, 2023 1,693 Granted — Exercised (131) Forfeited/canceled (60) Outstanding at June 30, 2024 1,502
Schedule of Restricted Stock Units Activity	The following table summarizes activity for restricted stock units that contain service-only vesting conditions (in thousands): Nonvested at December 31, 2023 2,208 Granted 1,603 Vested (597) Forfeited/canceled (207) Nonvested at June 30, 2024 3,007 The following table summarizes activity for restricted stock units with performance and service vesting conditions with grant dates established (in thousands): Nonvested at December 31, 2023 113 Granted 206 Performance adjustment (62) Vested (51) Forfeited/canceled (8) Nonvested at June 30, 2024 198 The following table summarizes activity for restricted stock units with performance and service vesting conditions with no grant dates established (in thousands): Nonvested at December 31, 2023 235 Granted 147 Accounting grant dates established (133) Vested — Forfeited/canceled (5) Nonvested at June 30, 2024 244 The following table summarizes activity for restricted stock units with market and service-based conditions (in thousands): Nonvested at December 31, 2023 — Granted 202 Vested — Forfeited/canceled — Nonvested at June 30, 2024 202

Net Income per Share (Tables)

Net Income per Share (Tables)	6 Months Ended
	Jun. 30, 2024
Earnings Per Share [Abstract]
Schedule of Basic and Diluted Income (Loss) per Share	The following table sets forth the computation of basic and diluted net income per share (in thousands, except per share amounts): Quarter Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Basic net income per share Numerator: Net income attributable to BlackLine, Inc. $ 76,690 $ 30,849 $ 87,519 $ 18,841 Denominator: Weighted average shares 61,979 60,700 61,811 60,445 Basic net income per share attributable to BlackLine, Inc. $ 1.24 $ 0.51 $ 1.42 $ 0.31 Diluted net income per share Numerator: Net income attributable to BlackLine, Inc. $ 76,690 $ 30,849 $ 87,519 $ 18,841 Interest expense, net of taxes 1,707 1,458 3,101 2,897 Gain on extinguishment of convertible senior notes, net of taxes (62,147) — (62,147) — Net income attributable to BlackLine, Inc. for diluted calculation $ 16,250 $ 32,307 $ 28,473 $ 21,738 Denominator: Weighted average shares 61,979 60,700 61,811 60,445 Dilutive effect of securities 635 777 781 1,032 Dilutive effect of convertible senior notes 9,908 10,324 10,116 10,324 Shares used to calculate diluted net income per share 72,522 71,801 72,708 71,801 Diluted net income per share attributable to BlackLine, Inc. $ 0.22 $ 0.45 $ 0.39 $ 0.30
Schedule of Potentially Dilutive Shares Excluded From Calculation of Diluted per Share	The weighted average impact of potentially dilutive securities that were excluded from the diluted per share calculations because they were anti-dilutive were as follows (in thousands): Quarter Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Stock options - service-only vesting conditions 511 695 350 1,532 Restricted stock units - service-only vesting conditions 2,478 2,330 1,926 2,335 Restricted stock units - performance and service conditions 64 — 36 32 Restricted stock units - market and service conditions 181 — 103 — Restricted stock units - performance, market, and service conditions — 139 — 147 Total shares excluded from net income per share 3,234 3,164 2,415 4,046

Geographic Information (Tables)

Geographic Information (Tables)	6 Months Ended
	Jun. 30, 2024
Segment Reporting [Abstract]
Schedule of Revenues by Geographic Region	The following table sets forth the Company’s revenues by geographic region (in thousands): Quarter Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 United States $ 112,836 $ 104,052 $ 224,243 $ 204,064 International 47,670 40,522 93,724 79,494 $ 160,506 $ 144,574 $ 317,967 $ 283,558

Basis of Presentation, Signif_3

Basis of Presentation, Significant Accounting Policies and Recently-Issued Accounting Pronouncements (Details)	Jun. 30, 2024
Convertible Senior Notes due 2024
Debt Instrument [Line Items]
Convertible senior notes stated rate (as a percent)	0.125%
Convertible Senior Notes due 2026
Debt Instrument [Line Items]
Convertible senior notes stated rate (as a percent)	0%
Convertible Senior Notes Due 2029
Debt Instrument [Line Items]
Convertible senior notes stated rate (as a percent)	1%

Redeemable Non-Controlling In_3

Redeemable Non-Controlling Interest - Additional Information (Details) - BlackLine K.K. - BlackLine K.K. - USD ($) $ in Millions	1 Months Ended
	Nov. 30, 2021	Oct. 31, 2018
Redeemable Noncontrolling Interest [Line Items]
Business combination, contribution		$ 4.5
Business combination, outstanding common stock (as a percent)	51%	51%
Business combination, further investment by parent	$ 2.3

Redeemable Non-Controlling In_4

Redeemable Non-Controlling Interest - Schedule of Redeemable Non-Controlling Interest (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Redeemable Noncontrolling Interest [Roll Forward]
Balance at beginning of period	$ 33,900	$ 29,152	$ 30,063	$ 23,895
Net income attributable to redeemable non-controlling interest (excluding adjustment to non-controlling interest)	524	320	962	405
Foreign currency translation	(101)	(81)	(205)	(101)
Adjustment to redeemable non-controlling interest	(2,255)	(3,103)	1,248	2,089
Balance at end of period	$ 32,068	$ 26,288	$ 32,068	$ 26,288

Intangible Assets and Goodwil_2

Intangible Assets and Goodwill - Schedule of Carrying Value of Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 182,457	$ 182,457
Accumulated Amortization	(113,792)	(103,401)
Net Carrying Amount	68,665	79,056
Trade name
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	15,977	15,977
Accumulated Amortization	(15,977)	(15,977)
Net Carrying Amount	0	0
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	137,368	137,368
Accumulated Amortization	(73,667)	(66,900)
Net Carrying Amount	63,701	70,468
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	26,779	26,779
Accumulated Amortization	(22,808)	(19,342)
Net Carrying Amount	3,971	7,437
Defensive patent
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,333	2,333
Accumulated Amortization	(1,340)	(1,182)
Net Carrying Amount	$ 993	$ 1,151

Intangible Assets and Goodwil_3

Intangible Assets and Goodwill - Schedule of Changes in Goodwill (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2024 USD ($)
Goodwill [Roll Forward]
Balance beginning	$ 448,965
Additions from acquisitions	0
Balance ending	$ 448,965

Balance Sheet Components - Sche

Balance Sheet Components - Schedule of Investments in Marketable Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	$ 428,617	$ 932,850
Gross Unrealized Gains	0	740
Gross Unrealized Losses	(156)	(235)
Fair Value	428,461	933,355
U.S. treasury securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	275,644	523,344
Gross Unrealized Gains	0	737
Gross Unrealized Losses	(109)	(107)
Fair Value	275,535	523,974
Commercial paper
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	110,178	241,428
Gross Unrealized Gains	0	1
Gross Unrealized Losses	(2)	0
Fair Value	110,176	241,429
U.S. government agencies
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	42,795	168,078
Gross Unrealized Gains	0	2
Gross Unrealized Losses	(45)	(128)
Fair Value	$ 42,750	$ 167,952

Balance Sheet Components - Sc_2

Balance Sheet Components - Schedule of Fair Values of Available-for-Sale Securities, by Remaining Contractual Maturity (Details) $ in Thousands	Jun. 30, 2024 USD ($)
Amortized Cost
Maturing within 1 year	$ 416,618
Maturing between 1 and 2 years	11,999
Amortized cost	428,617
Fair Value
Maturing within 1 year	416,475
Maturing between 1 and 2 years	11,986
Fair Value	$ 428,461

Balance Sheet Components - Addi

Balance Sheet Components - Additional Information (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($) marketableSecurity	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) marketableSecurity	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) marketableSecurity
Balance Sheet Related Disclosures [Abstract]
Net gains (losses) on maturities of marketable securities	$ 6,700,000	$ 8,300,000	$ 15,300,000	$ 15,800,000
Securities in continuous loss position, less than 12 months, estimated fair value	308,700,000		308,700,000		$ 286,600,000
Securities in continuous loss position, less than 12 months, unrealized losses	$ 200,000		$ 200,000		$ 200,000
Number of securities in continuous unrealized loss position, greater than 12 months | marketableSecurity	0		0		0
Credit losses on marketable securities	$ 0		$ 0		$ 0
Deferred customer contract acquisition costs	$ 87,100,000		$ 87,100,000		$ 89,900,000

Balance Sheet Components - Sc_3

Balance Sheet Components - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Balance Sheet Related Disclosures [Abstract]
Accrued salaries and employee benefits	$ 27,468	$ 33,344
Accrued income and other taxes payable	9,942	9,408
Accrued restructuring costs	796	1,569
Other accrued expenses and current liabilities	13,718	15,369
Accrued expenses and other current liabilities	$ 51,924	$ 59,690

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	$ 971,517	$ 1,140,566
Liabilities
Contingent consideration	0	0
Total liabilities	0	0
U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	105,687
Marketable securities	275,535	523,974
Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	437,369	148,298
Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	38,926
Marketable securities	110,176	241,429
U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents		19,987
Marketable securities	42,750	167,952
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	818,591	672,272
Liabilities
Contingent consideration	0	0
Total liabilities	0	0
Level 1 | U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	105,687
Marketable securities	275,535	523,974
Level 1 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	437,369	148,298
Level 1 | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Marketable securities	0	0
Level 1 | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents		0
Marketable securities	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	152,926	468,294
Liabilities
Contingent consideration	0	0
Total liabilities	0	0
Level 2 | U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0
Marketable securities	0	0
Level 2 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Level 2 | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	38,926
Marketable securities	110,176	241,429
Level 2 | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents		19,987
Marketable securities	42,750	167,952
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	0	0
Liabilities
Contingent consideration	0	0
Total liabilities	0	0
Level 3 | U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0
Marketable securities	0	0
Level 3 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Level 3 | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Marketable securities	0	0
Level 3 | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents		0
Marketable securities	$ 0	$ 0

Fair Value Measurements - Sch_2

Fair Value Measurements - Schedule of Changes in Contingent Consideration Liability (Details) - Contingent Consideration - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning fair value	$ 0	$ 44,655	$ 0	$ 41,549
Additions in the period	0	0	0	0
Change in fair value	0	(25,535)	0	(22,429)
Ending fair value	$ 0	$ 19,120	$ 0	$ 19,120

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details) - FourQ Systems, Inc.	Jun. 30, 2024 USD ($)	Jan. 26, 2022 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Maximum contingent consideration to be distributed		$ 73,200,000
Contingent consideration	$ 0
Measurement Input, Expected Term
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Measurement input (in years)		3

Convertible Senior Notes - Addi

Convertible Senior Notes - Additional Information (Details) $ / shares in Units, $ in Thousands		1 Months Ended	3 Months Ended		6 Months Ended
	May 24, 2024 USD ($) day $ / shares	May 31, 2024 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Aug. 01, 2024 USD ($)	Jun. 05, 2024 USD ($)	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Amortization of debt issuance costs					$ 2,679	$ 2,741
Liquid investments on hand used to repurchase senior notes					324,098	0
Gain on extinguishment of convertible senior notes			$ 65,112	$ 0	$ 65,112	0
Convertible Senior Notes due 2024
Debt Instrument [Line Items]
Convertible senior notes stated rate (as a percent)			0.125%		0.125%
Convertible Senior Notes due 2024 | Senior Notes
Debt Instrument [Line Items]
Principal			$ 250,000		$ 250,000				$ 250,000
Convertible senior notes stated rate (as a percent)			0.125%		0.125%
Effective interest rate (as a percent)			0.65%		0.65%
Amortization of debt issuance costs			$ 300	300	$ 700	600
Coupon interest expense			100	100	200	200
Convertible Senior Notes due 2024 | Senior Notes | Level 2
Debt Instrument [Line Items]
Estimated fair value of convertible senior notes			$ 226,900		$ 226,900
Convertible Senior Notes due 2024 | Senior Notes | Subsequent Event
Debt Instrument [Line Items]
Aggregate repurchase principal amount							$ 250,000
Convertible Senior Notes Due 2029
Debt Instrument [Line Items]
Convertible senior notes stated rate (as a percent)			1%		1%
Coupon interest expense			$ 300		$ 700
Purchase of capped calls	$ 59,700
Cap price per share (in usd per share) | $ / shares	$ 92.17
Convertible Senior Notes Due 2029 | Level 2
Debt Instrument [Line Items]
Estimated fair value of convertible senior notes			653,200		653,200
Convertible Senior Notes Due 2029 | Senior Notes
Debt Instrument [Line Items]
Principal			675,000		675,000				0
Convertible senior notes stated rate (as a percent)	1%
Effective interest rate (as a percent)	1.40%
Proceeds from senior notes offering		$ 662,600
Aggregate principal	$ 600,000
Option to purchase principal amount								$ 75,000
Conversion rate	0.0146047
Conversion price (in usd per share) | $ / shares	$ 68.47
Debt repurchase amount percentage prior to maturity	100%
Percentage of principal amount of notes declared as accrued based on certain customary events of default	25%
Convertible Senior Notes Due 2029 | Senior Notes | Condition One
Debt Instrument [Line Items]
Trading days | day	20
Consecutive trading days | day	30
Conversion price, threshold percentage	130%
Convertible Senior Notes Due 2029 | Senior Notes | Condition Two
Debt Instrument [Line Items]
Consecutive trading days | day	5
Conversion price, threshold percentage	98%
Business day | day	5
Convertible Senior Notes due 2026
Debt Instrument [Line Items]
Principal			$ 230,200		$ 230,200
Convertible senior notes stated rate (as a percent)			0%		0%
Effective interest rate (as a percent)			0.37%		0.37%
Convertible Senior Notes due 2026 | Senior Notes
Debt Instrument [Line Items]
Principal			$ 230,196		$ 230,196				$ 1,150,000
Aggregate repurchase principal amount		919,800
Amortization of debt issuance costs			700	$ 1,100	1,800	$ 2,100
Liquid investments on hand used to repurchase senior notes		$ 185,900
Gain on extinguishment of convertible senior notes			65,100		65,100
Convertible Senior Notes due 2026 | Senior Notes | Level 2
Debt Instrument [Line Items]
Estimated fair value of convertible senior notes			$ 210,800		$ 210,800

Convertible Senior Notes - Sche

Convertible Senior Notes - Schedule of Notes (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Convertible Senior Notes due 2024 | Senior Notes
Debt Instrument [Line Items]
Principal	$ 250,000	$ 250,000
Unamortized debt issuance costs	(112)	(767)
Net carrying amount	249,888	249,233
Convertible Senior Notes due 2026
Debt Instrument [Line Items]
Principal	230,200
Convertible Senior Notes due 2026 | Senior Notes
Debt Instrument [Line Items]
Principal	230,196	1,150,000
Unamortized debt issuance costs	(1,457)	(9,392)
Net carrying amount	228,739	1,140,608
Convertible Senior Notes Due 2029 | Senior Notes
Debt Instrument [Line Items]
Principal	675,000	0
Unamortized debt issuance costs	(12,760)	0
Net carrying amount	$ 662,240	$ 0

Restructuring Costs - Schedule

Restructuring Costs - Schedule of Restructuring Liability (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Restructuring Reserve [Roll Forward]
Balance at beginning of period	$ 627		$ 1,569
Restructuring charges	928	$ 135	1,372	$ 1,149
Cash payments and adjustments	(759)		(2,145)
Balance at end of period	796		796
2023 Restructuring Program
Restructuring Reserve [Roll Forward]
Balance at beginning of period	624		1,562
Restructuring charges	928		1,372
Cash payments and adjustments	(756)		(2,138)
Balance at end of period	796		796
2022 Restructuring Program
Restructuring Reserve [Roll Forward]
Balance at beginning of period	3		7
Restructuring charges	0		0
Cash payments and adjustments	(3)		(7)
Balance at end of period	$ 0		$ 0

Restructuring Costs - Additiona

Restructuring Costs - Additional Information (Details) $ in Millions	Jun. 30, 2024 USD ($)
2023 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Cumulative restructuring cost incurred	$ 11.2
2022 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Cumulative restructuring cost incurred	$ 5

Equity Awards - Schedule of Sto

Equity Awards - Schedule of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	$ 22,726	$ 19,948	$ 41,288	$ 40,386
Cost of revenues
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	2,973	2,770	4,935	5,122
Sales and marketing
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	6,629	6,182	12,423	12,665
Research and development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	3,499	3,708	6,350	7,532
General and administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	$ 9,625	$ 7,288	$ 17,580	$ 15,067

Equity Awards - Additional Info

Equity Awards - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Share-Based Payment Arrangement [Abstract]
Stock-based compensation capitalized	$ 1.2	$ 1	$ 2.1	$ 1.8

Equity Awards - Schedule of S_2

Equity Awards - Schedule of Stock Options Activity (Details) shares in Thousands	6 Months Ended
	Jun. 30, 2024 shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, beginning balance (in shares)	1,693
Granted (in shares)	0
Exercised (in shares)	(131)
Forfeitures/canceled (in shares)	(60)
Outstanding, ending balance (in shares)	1,502

Equity Awards - Schedule of Res

Equity Awards - Schedule of Restricted Stock Units Activity (Details) shares in Thousands	6 Months Ended
	Jun. 30, 2024 shares
Restricted stock units
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested, beginning balance (in shares)	2,208
Granted (in shares)	1,603
Vested (in shares)	(597)
Forfeited/canceled (in shares)	(207)
Nonvested, ending balance (in shares)	3,007
Restricted stock units - performance and service conditions
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested, beginning balance (in shares)	113
Granted (in shares)	206
Performance adjustment (in shares)	(62)
Vested (in shares)	(51)
Forfeited/canceled (in shares)	(8)
Nonvested, ending balance (in shares)	198
Restricted stock units - performance and service conditions, no grant date
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested, beginning balance (in shares)	235
Granted (in shares)	147
Performance adjustment (in shares)	(133)
Vested (in shares)	0
Forfeited/canceled (in shares)	(5)
Nonvested, ending balance (in shares)	244
Restricted stock units - market and service conditions
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested, beginning balance (in shares)	0
Granted (in shares)	202
Vested (in shares)	0
Forfeited/canceled (in shares)	0
Nonvested, ending balance (in shares)	202

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Tax Disclosure [Abstract]
Income tax expense	$ 4,337	$ 926	$ 5,206	$ 1,554
Change in income tax expense	$ 3,000		$ 3,000

Net Income per Share - Schedule

Net Income per Share - Schedule of Basic and Diluted Income (Loss) per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Numerator:
Net income attributable to BlackLine, Inc.	$ 76,690	$ 30,849	$ 87,519	$ 18,841
Denominator:
Weighted average shares (in shares)	61,979	60,700	61,811	60,445
Basic net income per share attributable to BlackLine, Inc. (in usd per share)	$ 1.24	$ 0.51	$ 1.42	$ 0.31
Numerator:
Net income attributable to BlackLine, Inc.	$ 76,690	$ 30,849	$ 87,519	$ 18,841
Interest expense, net of taxes	1,707	1,458	3,101	2,897
Gain on extinguishment of convertible senior notes, net of taxes	(62,147)	0	(62,147)	0
Net income attributable to BlackLine, Inc. for diluted calculation (in usd per share)	$ 16,250	$ 32,307	$ 28,473	$ 21,738
Denominator:
Weighted average shares (in shares)	61,979	60,700	61,811	60,445
Dilutive effect of securities (in shares)	635	777	781	1,032
Dilutive effect of convertible senior notes (in shares)	9,908	10,324	10,116	10,324
Shares used to calculate diluted net income per share (in shares)	72,522	71,801	72,708	71,801
Diluted net income per share attributable to BlackLine, Inc. (in usd per share)	$ 0.22	$ 0.45	$ 0.39	$ 0.30

Net Income per Share - Schedu_2

Net Income per Share - Schedule of Potentially Dilutive Shares Excluded From Calculation of Diluted per Share (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from net loss per share (in shares)	3,234	3,164	2,415	4,046
Stock options - service-only vesting conditions
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from net loss per share (in shares)	511	695	350	1,532
Restricted stock units - service-only vesting conditions
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from net loss per share (in shares)	2,478	2,330	1,926	2,335
Restricted stock units - performance and service conditions
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from net loss per share (in shares)	64	0	36	32
Restricted stock units - market and service conditions
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from net loss per share (in shares)	181	0	103	0
Restricted stock units - performance, market, and service conditions
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from net loss per share (in shares)	0	139	0	147

Net Income per Share - Addition

Net Income per Share - Additional Information (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Anti-dilutive shares excluded from net loss per share (in shares)	3,234	3,164	2,415	4,046
Convertible Senior Notes due 2024 | Convertible Notes | Certain Corporate Events Occur Prior to Maturity Date or Company Issues Notice of Redemption
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Anti-dilutive shares excluded from net loss per share (in shares)	4,700	4,700	4,700	4,700
Convertible Senior Notes due 2026 | Convertible Notes | Certain Corporate Events Occur Prior to Maturity Date or Company Issues Notice of Redemption
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Anti-dilutive shares excluded from net loss per share (in shares)	2,000	9,900	2,000	9,900
Convertible Senior Notes Due 2029 | Convertible Notes | Certain Corporate Events Occur Prior to Maturity Date or Company Issues Notice of Redemption
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Anti-dilutive shares excluded from net loss per share (in shares)	12,800		12,800

Unearned Revenue and Performa_2

Unearned Revenue and Performance Obligations - Additional Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Unearned Revenue And Performance Obligations [Abstract]
Deferred revenue recognized	$ 217.5	$ 195.2
Contracted not recognized revenue	$ 847.8

Unearned Revenue and Performa_3

Unearned Revenue and Performance Obligations - Remaining Performance Obligations (Details) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01	Jun. 30, 2024
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contracted not recognized revenue, expects to recognize revenue over next 12 months	57%
Remaining performance obligation, expected timing of satisfaction, period	12 months

Geographic Information - Schedu

Geographic Information - Schedule of Revenues by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Total revenues	$ 160,506	$ 144,574	$ 317,967	$ 283,558
United States
Disaggregation of Revenue [Line Items]
Total revenues	112,836	104,052	224,243	204,064
International
Disaggregation of Revenue [Line Items]
Total revenues	$ 47,670	$ 40,522	$ 93,724	$ 79,494

Subsequent Events (Details)

Subsequent Events (Details) - Convertible Senior Notes due 2024 - Senior Notes - Subsequent Event $ in Millions	Aug. 01, 2024 USD ($)
Subsequent Event [Line Items]
Aggregate repurchase principal amount	$ 250
Repayment of accrued interest	$ 0.2