CBIZ (CBZ) 10-Q 26 Oct 23 2023 Q3 Quarterly report Financial data

Cover

Cover - shares	9 Months Ended
	Sep. 30, 2023	Oct. 23, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Document Transition Report	false
Entity File Number	1-32961
Entity Registrant Name	CBIZ, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	22-2769024
Entity Address, Address Line One	6801 Brecksville Rd
Entity Address, Address Line Two	Door N
Entity Address, City or Town	Independence
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	44131
City Area Code	216
Local Phone Number	447-9000
Title of 12(b) Security	Common Stock, $0.01 Par Value
Trading Symbol	CBZ
Security Exchange Name	NYSE
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		49,841,832
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Entity Central Index Key	0000944148
Current Fiscal Year End Date	--12-31

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 1,415	$ 4,697
Restricted cash	38,229	28,487
Accounts receivable, net	465,848	334,498
Other current assets	37,879	29,431
Current assets before funds held for clients	543,371	397,113
Funds held for clients	122,531	171,313
Total current assets	665,902	568,426
Non-current assets:
Property and equipment, net	55,291	45,184
Goodwill and other intangible assets, net	1,014,607	951,702
Assets of deferred compensation plan	130,284	118,862
Right-of-use assets, net	193,552	184,043
Other non-current assets	14,858	10,907
Total non-current assets	1,408,592	1,310,698
Total assets	2,074,494	1,879,124
Current liabilities:
Accounts payable	80,609	80,725
Income taxes payable	16,184	1,607
Accrued personnel costs	118,289	130,456
Contingent purchase price liabilities	70,129	63,262
Operating lease liabilities	36,488	36,358
Other current liabilities	28,837	26,532
Current liabilities before client fund obligations	350,536	338,940
Client fund obligations	123,910	173,467
Total current liabilities	474,446	512,407
Non-current liabilities:
Bank debt	394,700	265,700
Debt issuance costs	(1,692)	(2,046)
Total long-term debt, net	393,008	263,654
Income taxes payable	2,029	2,211
Deferred income taxes, net	31,749	24,763
Deferred compensation plan obligations	130,284	118,862
Contingent purchase price liabilities	49,885	68,748
Lease liabilities	181,834	174,454
Other non-current liabilities	665	573
Total non-current liabilities	789,454	653,265
Total liabilities	1,263,900	1,165,672
STOCKHOLDERS' EQUITY
Common stock	1,374	1,363
Additional paid in capital	828,864	799,147
Retained earnings	867,821	734,116
Treasury stock	(891,880)	(824,778)
Accumulated other comprehensive income	4,415	3,604
Total stockholders’ equity	810,594	713,452
Total liabilities and stockholders’ equity	$ 2,074,494	$ 1,879,124

Condensed Consolidated Statemen

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Revenue	$ 410,539	$ 363,262	$ 1,263,647	$ 1,116,936
Operating expenses	342,148	306,017	1,027,146	886,052
Gross margin	68,391	57,245	236,501	230,884
Corporate general and administrative expenses	13,136	15,893	44,527	43,128
Operating income	55,255	41,352	191,974	187,756
Other (expense) income:
Interest expense	(5,848)	(2,305)	(15,023)	(5,209)
Gain on sale of operations, net	77	176	176	311
Other (expense) income, net	(2,288)	(2,622)	8,245	(24,932)
Total other expense, net	(8,059)	(4,751)	(6,602)	(29,830)
Income before income tax expense	47,196	36,601	185,372	157,926
Income tax expense	13,514	9,131	51,667	41,074
Net income	$ 33,682	$ 27,470	$ 133,705	$ 116,852
Earnings per share:
Basic (in dollars per share)	$ 0.68	$ 0.53	$ 2.67	$ 2.25
Diluted (in dollars per share)	$ 0.67	$ 0.53	$ 2.64	$ 2.22
Basic weighted average shares outstanding (in shares)	49,838	51,457	50,054	51,827
Diluted weighted average shares outstanding (in shares)	50,371	52,238	50,644	52,720
Comprehensive income:
Net income	$ 33,682	$ 27,470	$ 133,705	$ 116,852
Other comprehensive income, net of tax	487	2,179	811	4,584
Comprehensive income	$ 34,169	$ 29,649	$ 134,516	$ 121,436

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Restricted Stock Units and Awards	Performance share units	Common Stock	Common Stock Restricted Stock Units and Awards	Common Stock Performance share units	Treasury Shares	Additional Paid-In Capital	Additional Paid-In Capital Restricted Stock Units and Awards	Additional Paid-In Capital Performance share units	Retained Earnings	Accumulated Other Comprehensive (Loss) Income
Common stock, beginning balance (in shares) at Dec. 31, 2021				135,187
Treasury stock, beginning balance (in shares) at Dec. 31, 2021							83,149
Beginning balance at Dec. 31, 2021	$ 704,548			$ 1,352			$ (694,716)	$ 770,117			$ 628,762	$ (967)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	116,852										116,852
Other comprehensive income	4,584											4,584
Share repurchases (in shares)							1,628
Share repurchases	(67,976)						$ (67,976)
Indirect repurchase of shares for minimum tax withholding (in shares)							188
Indirect repurchase of shares for minimum tax withholding	(7,289)						$ (7,289)
Restricted stock units and awards and Performance share units (in shares)					120	211
Restricted stock units and awards and Performance share units		$ 0	$ 0		$ 1	$ 2			$ (1)	$ (2)
Stock options exercised (in shares)				541
Stock options exercised	7,994			$ 5				7,989
Stock-based compensation	11,987							11,987
Business acquisitions (in shares)				87
Business acquisitions	3,425			$ 1				3,424
Common stock, ending balance (in shares) at Sep. 30, 2022				136,146
Treasury stock, ending balance (in shares) at Sep. 30, 2022							84,965
Ending balance at Sep. 30, 2022	774,125			$ 1,361			$ (769,981)	793,514			745,614	3,617
Common stock, beginning balance (in shares) at Jun. 30, 2022				135,823
Treasury stock, beginning balance (in shares) at Jun. 30, 2022							84,221
Beginning balance at Jun. 30, 2022	764,523			$ 1,358			$ (737,559)	781,142			718,144	1,438
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	27,470										27,470
Other comprehensive income	2,179											2,179
Share repurchases (in shares)							744
Share repurchases	(32,422)						$ (32,422)
Restricted stock units and awards and Performance share units (in shares)					1
Stock options exercised (in shares)				254
Stock options exercised	4,098			$ 2				4,096
Stock-based compensation	5,559							5,559
Business acquisitions (in shares)				68
Business acquisitions	2,718			$ 1				2,717
Common stock, ending balance (in shares) at Sep. 30, 2022				136,146
Treasury stock, ending balance (in shares) at Sep. 30, 2022							84,965
Ending balance at Sep. 30, 2022	774,125			$ 1,361			$ (769,981)	793,514			745,614	3,617
Common stock, beginning balance (in shares) at Dec. 31, 2022				136,295
Treasury stock, beginning balance (in shares) at Dec. 31, 2022							86,115
Beginning balance at Dec. 31, 2022	713,452			$ 1,363			$ (824,778)	799,147			734,116	3,604
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	133,705										133,705
Other comprehensive income	811											811
Share repurchases (in shares)							1,151
Share repurchases	(58,000)						$ (58,000)
Indirect repurchase of shares for minimum tax withholding (in shares)							173
Indirect repurchase of shares for minimum tax withholding	$ (8,448)						$ (8,448)
Restricted stock units and awards and Performance share units (in shares)					153	244
Restricted stock units and awards and Performance share units		0	$ 0		$ 2	$ 2			(2)	$ (2)
Stock options exercised (in shares)	433			433
Stock options exercised	$ 8,375			$ 4				8,371
Stock-based compensation	9,721							9,721
Business acquisitions (in shares)				231
Business acquisitions	11,095			$ 3				11,092
Excise tax on share repurchases	(117)						$ (654)	537
Common stock, ending balance (in shares) at Sep. 30, 2023				137,356
Treasury stock, ending balance (in shares) at Sep. 30, 2023							87,439
Ending balance at Sep. 30, 2023	810,594			$ 1,374			$ (891,880)	828,864			867,821	4,415
Common stock, beginning balance (in shares) at Jun. 30, 2023				137,081
Treasury stock, beginning balance (in shares) at Jun. 30, 2023							87,259
Beginning balance at Jun. 30, 2023	776,043			$ 1,371			$ (882,088)	818,693			834,139	3,928
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	33,682										33,682
Other comprehensive income	487											487
Share repurchases (in shares)							176
Share repurchases	(9,472)						$ (9,472)
Indirect repurchase of shares for minimum tax withholding (in shares)							4
Indirect repurchase of shares for minimum tax withholding	(224)						$ (224)
Restricted stock units and awards and Performance share units (in shares)					9
Restricted stock units and awards and Performance share units		$ 0			$ 1				$ (1)
Stock options exercised (in shares)				212
Stock options exercised	4,123			$ 1				4,122
Stock-based compensation	3,102							3,102
Business acquisitions (in shares)				54
Business acquisitions	2,799			$ 1				2,798
Excise tax on share repurchases	54						$ (96)	150
Common stock, ending balance (in shares) at Sep. 30, 2023				137,356
Treasury stock, ending balance (in shares) at Sep. 30, 2023							87,439
Ending balance at Sep. 30, 2023	$ 810,594			$ 1,374			$ (891,880)	$ 828,864			$ 867,821	$ 4,415

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net income	$ 133,705	$ 116,852
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	26,965	24,707
Gain on sale of operations, net	(176)	(311)
Bad debt expense, net of recoveries	1,011	1,295
Adjustment to contingent earnout liability	2,071	1,917
Stock-based compensation expense	9,721	11,987
Deferred income taxes	6,689	5,690
Other, net	(1,156)	(2,096)
Changes in assets and liabilities, net of acquisitions and divestitures:
Accounts receivable, net	(121,249)	(125,700)
Other assets	(8,222)	(2,610)
Accounts payable	(1,057)	6,203
Income taxes payable	14,414	12,709
Accrued personnel costs	(12,593)	18,863
Other liabilities	7,131	(9,447)
Net cash provided by operating activities	57,254	60,059
Cash flows from investing activities:
Business acquisitions and purchases of client lists, net of cash acquired	(53,110)	(79,289)
Purchases of client fund investments	(2,472)	(19,771)
Proceeds from the sales and maturities of client fund investments	6,815	11,500
Proceeds from sales of divested operations	1,696	2,906
Change in funds held for clients	875	(171)
Additions to property and equipment	(19,035)	(6,030)
Other, net	(11,399)	(4,695)
Net cash used in investing activities	(76,630)	(95,550)
Cash flows from financing activities:
Proceeds from bank debt	975,300	655,500
Payment of bank debt	(846,300)	(539,700)
Payment for acquisition of treasury stock	(57,736)	(65,976)
Indirect repurchase of shares for minimum tax withholding	(8,448)	(7,289)
Changes in client funds obligations	(49,557)	(30,024)
Proceeds from exercise of stock options	8,375	7,994
Payment of contingent consideration for acquisitions and client lists	(40,076)	(12,408)
Other, net	0	(2,072)
Net cash (used in) provided by financing activities	(18,442)	6,025
Net decrease in cash, cash equivalents and restricted cash	(37,818)	(29,466)
Cash, cash equivalents and restricted cash at beginning of year	160,145	150,474
Cash, cash equivalents and restricted cash at end of period	122,327	121,008
Reconciliation of cash, cash equivalents and restricted cash to the Condensed Consolidated Balance Sheets:
Cash and cash equivalents	1,415	2,040
Restricted cash	38,229	39,555
Cash equivalents included in funds held for clients	82,683	79,413
Total cash, cash equivalents and restricted cash	$ 122,327	$ 121,008

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2023
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Selected Terms Used in Notes to the Condensed Consolidated Financial Statements ASA – Administrative Service Agreement ASC – Accounting Standards Codification ASU – Accounting Standards Update CPA firm – Certified Public Accounting firm FASB – The Financial Accounting Standards Board GAAP – United States Generally Accepted Accounting Principles SOFR – Secured Overnight Financing Rate LIBOR – London Interbank Offered Rate SEC – United States Securities and Exchange Commission Description of Business: CBIZ, Inc. is a diversified services company which, acting through its subsidiaries, has been providing professional business services since 1996, primarily to small and medium-sized businesses, as well as individuals, governmental entities, and not-for-profit enterprises throughout the United States and parts of Canada. CBIZ, Inc. manages and reports its operations along three practice groups: Financial Services, Benefits and Insurance Services and National Practices. A further description of products and services offered by each of the practice groups is provided in Note 12, Segment Disclosures, to the accompanying unaudited condensed consolidated financial statements. Effective April 1, 2023, CBIZ formed Rockside Insurance Company, Inc. ("Rockside"), a captive insurance company licensed in Vermont. Rockside, wholly owned by CBIZ, provides insurance coverages for a portion of the retention deductibles from CBIZ's certain insurance programs with third party insurers. Basis of Consolidation: The accompanying unaudited condensed consolidated financial statements include the operations of CBIZ, Inc. and all of its wholly-owned subsidiaries (“CBIZ”, the “Company”, “we”, “us”, or “our”), after elimination of all intercompany balances and transactions. These unaudited condensed consolidated financial statements do not reflect the operations or accounts of variable interest entities as the impact is not material to the financial condition, results of operations or cash flows of CBIZ. Unaudited Interim Financial Statements: The unaudited condensed consolidated financial statements have been prepared in accordance with GAAP and applicable rules and regulations of the Securities and Exchange Commission (the "SEC") regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. As such, the information included in this quarterly report on Form 10-Q should be read in conjunction with the consolidated financial statements and accompanying notes included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2022. In the opinion of CBIZ management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial condition, results of operations, and cash flows for the interim periods presented, but are not necessarily indicative of the results of operations to be anticipated for the full year ending December 31, 2023. Use of Estimates: The preparation of unaudited condensed consolidated financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the amounts reported and disclosed in the financial statements and the accompanying notes. Changes in circumstances could cause actual results to differ materially from these estimates. Changes in Accounting Policies: We have consistently applied the accounting policies for the periods presented as described in Note 1, Basis of Presentation and Significant Accounting Policies, to the consolidated financial statements contained in our Annual Report on Form 10-K for the fiscal year ended December 31, 2022. Reclassifications: Certain prior period amounts have been reclassified to conform to current year's presentation.

New Accounting Pronouncements

New Accounting Pronouncements	9 Months Ended
	Sep. 30, 2023
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncements	NEW ACCOUNTING PRONOUNCEMENTS The FASB ASC is the sole source of authoritative GAAP other than the SEC issued rules and regulations that apply only to SEC registrants. The FASB issues an ASU to communicate changes to the FASB ASC. We assess and review the impact of all issued ASUs. During the nine months ended September 30, 2023, we have implemented all new ASUs that are in effect and that may impact our consolidated financial statements. Accounting Standards Adopted in 2023 In August 2023, the FASB issued ASU No. 2023-04, Liabilities (Topic 405): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 121 , which amended and added various SEC paragraphs in the ASC to reflect the issuance of SEC Staff Bulletin No. 121. We adopted ASU No. 2023-04 upon issuance and the adoption had no material impact on our condensed consolidated financial statements and related disclosures. In July 2023, the FASB issued ASU No. 2023-03, Presentation of Financial Statements (Topic 205), Income Statement - Reporting Comprehensive Income (Topic 220), Distinguishing Liabilities from Equity (Topic 480), Equity (Topic 505), and Compensation - Stock Compensation (Topic 718): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 120, SEC Staff Announcement at the March 24, 2022 EITF Meeting, and Staff Accounting Bulletin Topic 6.B, Accounting Series Release 280 - General Revision of Regulation S-X: Income or Loss Applicable to Common Stock,

Accounts Receivable, Net

Accounts Receivable, Net	9 Months Ended
	Sep. 30, 2023
Receivables [Abstract]
Accounts Receivable, Net	ACCOUNTS RECEIVABLE, NET Accounts receivable, less allowance for doubtful accounts, reflects the net realizable value of receivables and approximates fair value. Unbilled revenue is recorded at estimated net realizable value. Assessing the collectability of the receivables (billed and unbilled) requires management judgment based on a combination of factors, including but not limited to, an evaluation of our historical incurred loss experience, credit-worthiness of our clients, age of the trade receivable balance, current economic conditions that may affect a client’s ability to pay, and reasonable and supportable forecasts. Receivables are charged-off against the allowance when the balance is deemed uncollectible. Accounts receivable, net, at September 30, 2023 and December 31, 2022 was as follows (in thousands): September 30, December 31, Trade accounts receivable $ 301,331 $ 267,409 Unbilled revenue, at net realizable value 189,287 87,890 Total accounts receivable 490,618 355,299 Allowance for doubtful accounts (24,770) (20,801) Accounts receivable, net $ 465,848 $ 334,498 Changes to the allowance for doubtful accounts for the nine months ended September 30, 2023 and twelve months ended December 31, 2022 were as follows (in thousands): September 30, December 31, Balance at beginning of period $ (20,801) $ (16,158) Provision (8,867) (13,545) Charge-offs, net of recoveries 4,898 8,902 Allowance for doubtful accounts $ (24,770) $ (20,801)

Debt and Financing Arrangements

Debt and Financing Arrangements	9 Months Ended
	Sep. 30, 2023
Debt Disclosure [Abstract]
Debt and Financing Arrangements	DEBT AND FINANCING ARRANGEMENTS On May 4, 2022, we entered into a credit facility (the "2022 credit facility" or the "credit facility"), which amended and restated the 2018 credit facility. The 2022 credit facility increased our borrowing capacity from $400 million to $600 million, providing us with the capital necessary to meet our working capital needs as well as the flexibility to continue with our strategic initiatives, including business acquisitions and share repurchases. Other important key terms of the 2022 credit facility included: (i) an accordion feature that permits lenders to extend an additional $200 million at later date; (ii) no change in pricing from the 2018 credit facility; (iii) upsizing of baskets and various sublimits to reflect the increased size of the Company's business; (iv) a swing line facility increase from $25 million to $50 million, providing for same-day funds to cover daily liquidity needs; and (v) base interest rate amended from LIBOR to Term SOFR. The 2022 credit facility matures on May 4, 2027. The balance outstanding under the 2022 credit facility was $394.7 million and $265.7 million at September 30, 2023 and December 31, 2022, respectively. The combined effective interest rates under the 2018 and 2022 credit facilities, including the impact of interest rate swaps associated with those credit facilities, for the nine months ended September 30, 2023 and 2022 were as follows: Nine Months Ended 2023 2022 Weighted average rates 5.16% 2.29% Range of effective rates 1.93% - 8.00% 1.08% - 4.18% We had approximately $195.0 million of available funds under the 2022 credit facility at September 30, 2023, net of outstanding letters of credit of $4.4 million. Available funds under the credit facility are based on a multiple of earnings before interest, taxes, depreciation and amortization as defined in the credit facility, and are reduced by letters of credit, other indebtedness and outstanding borrowings under the credit facility. Under the 2022 credit facility, loans are charged an interest rate consisting of a base rate or Term SOFR rate plus an applicable margin, letters of credit are charged based on the same applicable margin, and a commitment fee is charged on the unused portion of the credit facility. The 2022 credit facility contains certain restrictive covenants customary for facilities of this type, including restrictions on indebtedness, liens or other encumbrances, making certain payments, investments, or to sell or otherwise dispose of a substantial portion of assets, or to merge or consolidate with an unaffiliated entity. The 2022 credit facility also limits our ability to make dividend payments. Historically, we have not paid cash dividends on our common stock. Our Board of Directors has discretion over the payment and level of dividends on common stock, subject to the limitations of the credit facility and applicable law. The credit facility contains a provision that, in the event of a defined change in control, the credit facility may be terminated. In addition, the 2022 credit facility contains financial covenants that require us to meet certain requirements with respect to (i) a total leverage ratio and (ii) minimum interest coverage ratio which may limit our ability to borrow up to the total commitment amount. As of September 30, 2023, we are in compliance with all covenants. Other Line of Credit - We have an unsecured $20.0 million line of credit by and among CBIZ Benefits and Insurance, Inc. and Huntington National Bank. We utilize this line to support our short-term funding requirements of payroll client fund obligations due to the investment of client funds, rather than liquidating client funds that have already been invested in available-for-sale securities. The line of credit, which was renewed on August 3, 2023 and will terminate on August 1, 2024, did not have a balance outstanding at September 30, 2023. Interest Expense - Interest expense, including amortization of deferred financing costs, commitment fees, line of credit fees, and other applicable bank charges, for the three and nine months ended September 30, 2023 and 2022 was as follows (in thousands): Three Months Ended September 30, 2023 2022 Credit facilities $ 5,848 $ 2,301 Other line of credit — 4 Total $ 5,848 $ 2,305 Nine Months Ended September 30, 2023 2022 Credit facilities $ 14,986 $ 5,204 Other line of credit — 5 Other 37 — Total $ 15,023 $ 5,209

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Letters of Credit and Guarantees - We provide letters of credit to landlords (lessors) of our leased premises in lieu of cash security deposits, which totaled $4.4 million and $5.0 million at September 30, 2023 and December 31, 2022, respectively. In addition, we provide license bonds to various state agencies to meet certain licensing requirements. The amount of license bonds outstanding was $2.3 million and $2.3 million at September 30, 2023 and December 31, 2022, respectively. Legal Proceedings - On December 19, 2016, CBIZ Operations, Inc. ("CBIZ Operations") was named as a defendant in a lawsuit filed by Zotec Partners, LLC (“Zotec”) in the Marion County Indiana Superior Court. After various amendments, the lawsuit asserted claims under Indiana law for securities, statutory and common law fraud or deception, unjust enrichment, breach of contract, and vicarious liability against CBIZ Operations and a former employee of CBIZ MMP in connection with the sale of the CBIZ MMP medical billing practice to Zotec. The plaintiff claimed that CBIZ Operations had a duty to disclose the fact, unknown to employees of CBIZ Operations at the time of the transaction, that the former employee had a financial arrangement with a Zotec vendor at the time CBIZ Operations sold CBIZ MMP to Zotec. The plaintiff sought damages of up to $177.0 million out of the $200.0 million transaction price. Trial was held in October 2021. The jury found in favor of CBIZ on all fraud, contract and other claims before it. On November 14, 2022, the trial court ruled in favor of CBIZ and against Zotec’s claim for statutory securities fraud. The court also ruled in favor of CBIZ on its counterclaim for indemnification under contract. The trial court has scheduled a hearing for November 2, 2023, to consider evidence regarding the amount of damages owed by Zotec to CBIZ on the counterclaim.

Financial Instruments

Financial Instruments	9 Months Ended
	Sep. 30, 2023
Investments, All Other Investments [Abstract]
Financial Instruments	FINANCIAL INSTRUMENTS Available-For-Sale Debt Securities - In connection with certain services provided by our payroll operations, we collect funds from our clients’ accounts in advance of paying client obligations. These funds held for clients are segregated and invested in accordance with our investment policy, which requires all investments carry an investment grade rating at the time of initial investment. These investments, primarily consisting of corporate and municipal bonds, are classified as available-for-sale and are included in the “Funds held for clients” line item on the accompanying unaudited Condensed Consolidated Balance Sheets. The par value of these investments totaled $40.0 million and $44.4 million at September 30, 2023 and December 31, 2022, respectively, and these investments have maturity or callable dates ranging from October 2023 through November 2025. At September 30, 2023, unrealized losses on the securities were not material and have not been recognized as a credit loss because the bonds are investment grade quality and management is not required or does not intend to sell prior to an expected recovery in value. The bond issuers continue to make timely principal and interest payments. The following table summarizes activities related to these investments for the nine months ended September 30, 2023 and the twelve months ended December 31, 2022 (in thousands): Nine Months Ended September 30, 2023 Twelve Months Ended December 31, 2022 Fair value at beginning of period $ 43,485 $ 38,670 Purchases 2,472 19,771 Redemptions (3,310) (5,630) Maturities (3,505) (6,770) Change in bond premium (527) (645) Fair market value adjustment 713 (1,911) Fair value at end of period $ 39,328 $ 43,485 In addition to the available-for-sale debt securities discussed above, we also held other depository assets in the amount of $0.5 million and $0.9 million at September 30, 2023 and December 31, 2022, respectively. Those depository assets are classified as Level 1 in the fair value hierarchy. Interest Rate Swaps - We utilize interest rate swaps to manage interest rate risk exposure associated with our floating-rate debt under the 2022 credit facility, or the forecasted acquisition of such liability. We do not purchase or hold any derivative instruments for trading or speculative purposes. Refer to the Annual Report on Form 10-K for the year ended December 31, 2022 for further discussion on our interest rate swaps. During the first quarter of 2023, we entered into a new 5-year interest rate swap with a notional value of $25.0 million and fixed rate of 3.669%. During the second quarter of 2023, one interest rate swap expired with a notional value of $15.0 million. As of September 30, 2023, we have four interest rate swaps outstanding. Under the terms of the interest rate swaps, we pay interest at a fixed rate of interest plus applicable margin as stated in the amended agreements, and receive interest that varies with the one-month Term SOFR. The following table summarizes our outstanding interest rate swaps and their classification in the accompanying unaudited Condensed Consolidated Balance Sheets at September 30, 2023 and December 31, 2022 (amounts in thousands): September 30, 2023 Notional Fixed Rate Expiration Fair Balance Sheet Location Interest rate swap $ 50,000 0.834 % 4/14/2025 $ 3,139 Other non-current asset Interest rate swap $ 30,000 1.186 % 12/14/2026 $ 2,973 Other non-current asset Interest rate swap $ 20,000 2.450 % 8/14/2027 $ 1,390 Other non-current asset Interest rate swap $ 25,000 3.669 % 4/14/2028 $ 681 Other non-current asset December 31, 2022 Notional Fixed Rate Expiration Fair Balance Sheet Location Interest rate swap $ 15,000 2.571 % 6/1/2023 $ 133 Other current asset Interest rate swap $ 50,000 0.834 % 4/14/2025 $ 3,726 Other non-current asset Interest rate swap $ 30,000 1.186 % 12/14/2026 $ 2,871 Other non-current asset Interest rate swap $ 20,000 2.450 % 8/14/2027 $ 1,079 Other non-current asset Refer to Note 7, Fair Value Measurements, for additional disclosures regarding fair value measurements. The following table summarizes the effects of the interest rate swaps on the accompanying unaudited Condensed Consolidated Statements of Comprehensive Income for the three and nine months ended September 30, 2023 and 2022 (in thousands): Gain Recognized Gain (Loss) Reclassified Three Months Ended Three Months Ended 2023 2022 2023 2022 Interest rate swaps $ 1,163 $ 2,815 $ 1,122 $ 220 Nine Months Ended Nine Months Ended 2023 2022 2023 2022 Interest rate swaps $ 2,635 $ 6,009 $ 3,092 $ (278)

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2023
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE MEASUREMENTS The following table summarizes our assets and (liabilities) at September 30, 2023 and December 31, 2022, respectively, that are measured at fair value on a recurring basis subsequent to initial recognition and indicates the fair value hierarchy of the valuation techniques utilized by us to determine such fair value (in thousands): Level September 30, 2023 December 31, 2022 Deferred compensation plan assets 1 $ 130,284 $ 118,862 Available-for-sale debt securities 1 39,328 43,485 Other depository assets 1 519 868 Deferred compensation plan liabilities 1 (130,284) (118,862) Interest rate swaps 2 8,183 7,809 Contingent purchase price liabilities 3 (120,014) (132,010) During the nine months ended September 30, 2023 and 2022, there were no transfers between the valuation hierarchy Levels 1, 2 and 3. The following table summarizes the change in Level 3 fair values of our contingent purchase price liabilities for the nine months ended September 30, 2023 and 2022 (pre-tax basis) (in thousands): 2023 2022 Beginning balance – December 31 $ (132,010) $ (79,139) Additions from business acquisitions (32,142) (74,199) Settlement of contingent purchase price liabilities 46,209 14,047 Change in fair value of contingencies 58 461 Change in net present value of contingencies (2,129) (2,378) Ending balance – September 30 $ (120,014) $ (141,208) Contingent purchase price liabilities result from our business acquisitions and are recorded at fair value at the time of acquisition and are presented as “Contingent purchase price liabilities — current” and “Contingent purchase price liabilities — non-current” in the accompanying unaudited Condensed Consolidated Balance Sheets. We estimate the fair value of our contingent purchase price liabilities using a probability-weighted discounted cash flow model. This fair value measure is based on significant inputs not observed in the market and thus represents a Level 3 measurement. Fair value measurements characterized within Level 3 of the fair value hierarchy are measured based on unobservable inputs that are supported by little or no market activity and reflect our own assumptions in measuring fair value. We probability weight risk-adjusted estimates of future performance of acquired businesses, then calculate the contingent purchase price based on the estimates and discount them to present value representing management’s best estimate of fair value. The fair value of the contingent purchase price liabilities is reassessed quarterly based on assumptions provided by practice group leaders and business unit controllers together with our corporate finance department. Any change in the fair value estimate is recorded in the earnings of that period. Refer to Note 11, Business Combinations, for further discussion of our acquisitions and contingent purchase price liabilities.

Other Comprehensive Income

Other Comprehensive Income	9 Months Ended
	Sep. 30, 2023
Equity [Abstract]
Other Comprehensive Income	OTHER COMPREHENSIVE INCOME The following table is a summary of other comprehensive income and discloses the tax impact of each component of other comprehensive income for the three and nine months ended September 30, 2023 and 2022 (in thousands): Three Months Ended Nine Months Ended 2023 2022 2023 2022 Net unrealized gain (loss) on available-for-sale securities, net of income taxes (1) $ 172 $ (457) $ 510 $ (1,614) Net unrealized gain on interest rate swaps, net of income taxes (2) 321 2,647 316 6,218 Foreign currency translation (6) (11) (15) (20) Total other comprehensive income $ 487 $ 2,179 $ 811 $ 4,584 (1) Net of income tax expense of $68 and income tax benefit of $171 for the three months ended September 30, 2023 and 2022, respectively, and net of income tax expense of $203 and income tax benefit of $604 for the nine months ended September 30, 2023 and 2022, respectively. (2) Net of income tax expense of $108 and income tax expense of $863 for the three months ended September 30, 2023 and 2022, respectively, and net of income tax expense of $94 and income tax expense of $2,041 for the nine months ended September 30, 2023 and 2022, respectively.

Employee Stock Plans

Employee Stock Plans	9 Months Ended
	Sep. 30, 2023
Share-Based Payment Arrangement [Abstract]
Employee Stock Plans	EMPLOYEE STOCK PLANS On May 10, 2023, the shareholders of the Company approved an amendment to the 2019 Stock Omnibus Incentive Plan (the “2019 Plan”). The amendment added 1.5 million shares to the total number of shares that may be issued under the 2019 Plan. All other respects of the Plan remain unchanged. The 2019 Plan, which expires in 2029, permits the grant of various forms of stock-based awards. A maximum of 4.6 million stock options, restricted stock or other stock-based compensation awards may be granted. The terms and vesting schedules for the stock-based awards vary by type and date of grant. Shares subject to award under the 2019 Plan may be either authorized but unissued shares of our common stock or treasury shares. Refer to the Annual Report on Form 10-K for the year ended December 31, 2022 for further discussion on the 2019 Plan. Compensation expense for stock-based awards recognized during the three and nine months ended September 30, 2023 and 2022 was as follows (in thousands): Three Months Ended Nine Months Ended 2023 2022 2023 2022 Stock options $ — $ — $ 768 $ 248 Restricted stock units and awards 1,452 1,188 4,066 4,015 Performance share units 1,650 4,371 4,887 7,724 Total stock-based compensation expense $ 3,102 $ 5,559 $ 9,721 $ 11,987 Stock Options and Restricted Stock Units and Awards – The following table presents our stock options and restricted stock units and awards activity during the nine months ended September 30, 2023 (in thousands, except per share data): Stock Options Restricted Stock Units and Awards Number of Weighted Average Exercise Price Per Share Number of Weighted Average Grant-Date Fair Value (1) Outstanding at beginning of year 553 $ 21.03 277 $ 32.62 Granted 50 $ 48.40 109 $ 48.64 Exercised or released (433) $ 19.34 (163) $ 31.63 Outstanding at September 30, 2023 170 $ 33.36 223 $ 41.19 Exercisable at September 30, 2023 170 $ 33.36 (1) Represents weighted average market value of the shares; awards are granted at no cost to the recipients. CBIZ utilized the Black-Scholes-Merton options pricing model to determine the fair value of stock options on the date of grant. The per-share fair value of stock options granted on February 8, 2023 was $15.35. The following weighted average assumptions were utilized: Nine Months Ended September 30, 2023 Expected volatility (1) 28.57% Expected option life (years) (2) 4.74 Risk-free interest rate (3) 3.89% Expected dividend yield (4) —% (1) The expected volatility assumption was determined based upon the historical volatility of CBIZ's stock price using daily price intervals. (2) The expected option life was determined based upon CBIZ's historical data using a midpoint scenario, which assumes all options are exercised halfway between the expiration date and the weighted average time it takes the option to vest. (3) The risk-free interest rate assumption was based upon zero-coupon U.S. treasury bonds with a term approximating the expected life of the respective options. (4) The expected dividend yield assumption was determined in view of CBIZ's historical and estimated dividend payouts. Performance Share Units (“PSUs”) – PSUs are earned based on our financial performance over a contractual term of three years and the associated expense is recognized over that period based on the fair value of the award. A three-year cliff vesting schedule of the PSUs is dependent upon the Company’s performance relative to pre-established goals based on an earnings per share target (weighted 70%) and total growth in revenue (weighted 30%). The fair value of PSUs is calculated using the market value of a share of our common stock on the date of grant. For performance achieved above specified levels, the recipient may earn additional shares of stock, not to exceed 200% of the number of PSUs initially granted. The following table presents our PSUs activity during the nine months ended September 30, 2023 (in thousands, except per share data): Performance Weighted Average Grant-Date Fair Value Per Unit (1) Outstanding at beginning of year 482 $ 28.84 Granted 88 $ 48.40 Vested (244) $ 25.75 Adjustments for performance results (2) 138 $ 27.68 Outstanding at September 30, 2023 464 $ 33.84 (1) Represents weighted average market value of the performance share units; PSUs are granted at no cost to the recipients.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2023
Earnings Per Share [Abstract]
Earnings Per Share	EARNINGS PER SHARE The following table sets forth the computation of basic and diluted earnings per share for the three and nine months ended September 30, 2023 and 2022 (in thousands, except per share data): Three Months Ended Nine Months Ended 2023 2022 2023 2022 Numerator: Net Income $ 33,682 $ 27,470 $ 133,705 $ 116,852 Denominator: Basic Weighted average common shares outstanding 49,838 51,457 50,054 51,827 Diluted Stock options (1) 148 434 206 523 Restricted stock units and awards (1) 96 118 95 141 Performance share units 277 205 277 205 Contingent shares (2) 12 24 12 24 Diluted weighted average common shares outstanding (3) 50,371 52,238 50,644 52,720 Basic earnings per share $ 0.68 $ 0.53 $ 2.67 $ 2.25 Diluted earnings per share $ 0.67 $ 0.53 $ 2.64 $ 2.22 (1) A total of 60 thousand shares of stock-based awards were excluded from the calculation of diluted earnings per share for nine months ended September 30, 2023, as their effect would be anti-dilutive. A total of 72 thousand shares of stock-based awards were excluded from the calculation of diluted earnings per share for the nine months ended September 30, 2022, as their effect would be anti-dilutive. No stock-based awards were excluded from the calculation of diluted earnings per share for the three months ended September 30, 2023 and 2022, as their effect was dilutive. (2) Contingent shares represent additional shares to be issued for purchase price earned by former owners of businesses acquired by us once future considerations have been met. Refer to Note 11, Business Combinations, for further details. (3) The denominator used in calculating diluted earnings per share did not include 187 thousand PSUs for both the three and nine months ended September 30, 2023, and the denominator used in calculating diluted earnings per share did not include 237 thousand PSUs for both the three and nine months ended September 30, 2022. The performance conditions associated with these performance share units were not met and consequently none of these PSUs were considered as issuable for the three and nine months ended September 30, 2023 and 2022.

Business Combinations

Business Combinations	9 Months Ended
	Sep. 30, 2023
Business Combination and Asset Acquisition [Abstract]
Business Combinations	BUSINESS COMBINATIONS Business Combinations During the nine months ended September 30, 2023, we completed the following acquisitions: • Effective January 1, 2023, we acquired all of the assets of Danenhauer and Danenhauer, Inc ("Danenhauer and Danenhauer"). Danenhauer and Danenhauer, based in California, is a provider of forensic accounting, business valuation, expert witness testimony, and other services for businesses and individuals. Operating results for Danenhauer and Danenhauer are reported in the Financial Services practice group. • Effective February 1, 2023, we acquired the non-attest assets of Somerset CPAs and Advisors ("Somerset"). Somerset, based in Indianapolis, Indiana, is a provider of a full range of accounting, tax, and financial advisory services to clients in a wide array of industries. Operating results for Somerset are reported in the Financial Services practice group. • Effective June 1, 2023, we acquired all of the assets of Pivot Point Security ("PPS"). PPS, based in Hamilton, New Jersey, is a provider of cyber and information security, and compliance services for small and middle market businesses. Operating results for PPS are reported in the Financial Services practice group. • Effective June 1, 2023, we acquired all of the assets of Ickovic and Co. PC ("Ickovic and Co."). Ickovic and Co., based in Denver, Colorado, is a provider of bespoke services and solutions for high-net-worth individuals, business owners and executives. Operating results for Ickovic and Co. are reported in the Financial Services practice group. • Effective July 1, 2023, we acquired all of the assets of American Pension Advisors, Ltd. ("APA"). APA, based in Indianapolis, Indiana, is a provider of full-service retirement plan consulting and administration assisting more than 1,200 clients in the design, implementation, and administration of all types of retirement plans including 401(k), 403(b), 457(b), defined benefit and cash balance. Operating results for APA are reported in the Benefits and Insurance Services practice group. During the nine months ended September 30, 2022, we completed the following acquisition: • Effective January 1, 2022, we acquired all of the non-attest assets of Marks Paneth LLP ("Marks Paneth"). Marks Paneth, based in New York City, is a provider of a full range of accounting, tax and consulting services to a wide range of industries. Marks Paneth is included as a component of our Financial Services practice group. Operating results are reported in the Financial Services practice group. • Effective July 1, 2022, we acquired substantially all the assets of Stinnett & Associates, LLC ("Stinnett"). Stinnett, located in Tulsa, Oklahoma, is a professional advisory firm and certified Women's Business Enterprise providing internal audit, Sarbanes-Oxley compliance, cybersecurity reviews, business continuity and disaster recovery, and fraud investigations to businesses of all sizes including Fortune 1000 organizations in a variety of industries. Operating results are reported in the Financial Services practice group. The acquisitions of Danenhauer and Danenhauer, Somerset, PPS, Ickovic and Co., and APA (together, the “2023 Acquisitions”) are expected to add approximately $67.3 million annualized revenue in 2023. For the nine months ended September 30, 2023, we recorded approximately $3.1 million in non-recurring transaction, retention and integration related costs associated with the Somerset acquisition. Pro forma results of operations for these acquisitions have not been presented because the effects of these acquisitions were not material, either individually or in aggregate, to our total revenue and net income for the three and nine months ended September 30, 2023 and 2022, respectively. The following table summarizes the consideration and purchase price allocation for the acquisitions completed during the nine months ended September 30, 2023 and 2022, respectively (in thousands): 2023 2022 Common stock issued (number) 102 42 Common stock value $ 4,796 $ 1,668 Cash paid 53,027 79,141 Recorded contingent consideration 32,142 74,199 Total recorded purchase price $ 89,965 $ 155,008 Accounts receivable acquired 8,539 20,429 Fixed assets acquired 1,108 1,933 Identifiable intangible assets acquired 35,267 53,400 Operating lease right-of-use asset acquired 14,972 49,291 Other assets acquired 1,163 1,693 Operating lease liability acquired - current (1,080) (5,860) Other current liabilities acquired (1,366) (1,594) Operating lease liability acquired - non-current (13,892) (43,431) Goodwill 45,254 79,147 Total net assets acquired $ 89,965 $ 155,008 Maximum potential contingent consideration $ 33,845 $ 77,075 Provisional estimates of fair value are established at the time of each acquisition and are subsequently reviewed within the first year of operations subsequent to the acquisition date to determine the necessity for adjustments. Fair value estimates of the 2023 Acquisitions were provisional as of September 30, 2023, primarily related to the value established for certain identifiable intangible assets and contingent purchase price consideration. The following table summarizes the goodwill and intangible asset amounts resulting from those acquisitions for the nine months ended September 30, 2023 and 2022, respectively (in thousands): Nine Months Ended September 30, 2023 2022 Financial Services Benefits and Insurance Services Financial Services Benefits and Insurance Services Goodwill $ 41,322 $ 3,932 $ 79,147 $ — Client list 33,196 2,053 53,400 — Other intangibles 18 — — — Total $ 74,536 $ 5,985 $ 132,547 $ — Goodwill is calculated as the difference between the aggregated purchase price and the fair value of the net assets acquired. Goodwill represents the value of expected future earnings and cash flows, as well as the synergies created by the integration of the new businesses within our organization, including cross-selling opportunities expected with our Financial Services practice group and the Benefits and Insurance Services practice group, to help strengthen our existing service offerings and expand our market position. Goodwill related to these acquisitions is deductible for tax purposes. Client lists from the aforementioned acquisitions have an expected life up to 10 years, and other intangibles, primarily non-compete agreements, have an expected life of 3 years. Client lists and non-compete agreements are valued using a discounted cash flow model based on management estimates of future cash flows from such assets. The following table summarizes the changes in contingent purchase price consideration for previous acquisitions and contingent payments made for previous business acquisitions in the three and nine months ended September 30, 2023 and 2022, respectively (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 Net expense $ 626 $ 440 $ 2,071 $ 1,917 Cash settlement paid $ 10,103 $ 4,167 $ 39,910 $ 12,289 Shares issued (number) 54 26 129 45 Divestitures and Sales of Assets

Segment Disclosures

Segment Disclosures	9 Months Ended
	Sep. 30, 2023
Segment Reporting [Abstract]
Segment Disclosures	SEGMENT DISCLOSURES Our business units have been aggregated into three practice groups: Financial Services, Benefits and Insurance Services and National Practices. The business units have been aggregated based on the following factors: similarity of the products and services provided to clients; similarity of the regulatory environment in which they operate; and similarity of economic conditions affecting long-term performance. The business units are managed along these segment lines. A general description of services provided by each practice group is provided in the table below. Financial Services Benefits and Insurance Services National Practices Accounting and Tax Employee Benefits Consulting Information Technology Managed Networking and Hardware Services Financial Advisory Payroll / Human Capital Management Healthcare Consulting Valuation Property and Casualty Insurance Risk and Advisory Services Retirement and Investment Services Government Healthcare Consulting Corporate and Other - Included in Corporate and Other are operating expenses that are not directly allocated to the individual business units. These expenses primarily consist of certain health care costs, gains or losses attributable to assets held in our non-qualified deferred compensation plan, stock-based compensation, consolidation and integration charges, certain professional fees, certain advertising costs and other various expenses. Accounting policies of the practice groups are the same as those described in Note 1, Basis of Presentation and Significant Accounting Policies, to the Annual Report on Form 10-K for the year ended December 31, 2022. Upon consolidation, intercompany accounts and transactions are eliminated, thus inter-segment revenue is not included in the measure of profit or loss for the practice groups. Performance of the practice groups is evaluated on income (loss) before income tax expense (benefit) excluding those costs listed above, which are reported in the “Corporate and Other”. Segment information for the three and nine months ended September 30, 2023 and 2022 is presented below. We do not manage our assets on a segment basis, therefore segment assets are not presented below. The following table disaggregates our revenue by source (in thousands): Three Months Ended September 30, 2023 Financial Benefits and National Consolidated Accounting, tax, advisory and consulting $ 298,372 — — $ 298,372 Core benefits and insurance services — 95,951 — 95,951 Non-core benefits and insurance services — 4,336 — 4,336 Managed networking, hardware services — — 9,205 9,205 National practices consulting — — 2,675 2,675 Total revenue $ 298,372 $ 100,287 $ 11,880 $ 410,539 Three Months Ended September 30, 2022 Financial Benefits and National Consolidated Accounting, tax, advisory and consulting $ 259,998 — — $ 259,998 Core benefits and insurance services — 88,364 — 88,364 Non-core benefits and insurance services — 3,703 — 3,703 Managed networking, hardware services — — 8,514 8,514 National practices consulting — — 2,683 2,683 Total revenue $ 259,998 $ 92,067 $ 11,197 $ 363,262 Nine Months Ended September 30, 2023 Financial Benefits and National Consolidated Accounting, tax, advisory and consulting $ 932,388 — — $ 932,388 Core benefits and insurance services — 283,599 — 283,599 Non-core benefits and insurance services — 12,580 — 12,580 Managed networking, hardware services — — 27,226 27,226 National practices consulting — — 7,854 7,854 Total revenue $ 932,388 $ 296,179 $ 35,080 $ 1,263,647 Nine Months Ended September 30, 2022 Financial Benefits and National Consolidated Accounting, tax, advisory and consulting $ 808,052 — — $ 808,052 Core benefits and insurance services — 264,666 — 264,666 Non-core benefits and insurance services — 11,595 — 11,595 Managed networking, hardware services — — 24,768 24,768 National practices consulting — — 7,855 7,855 Total revenue $ 808,052 $ 276,261 $ 32,623 $ 1,116,936 Segment information for the three months ended September 30, 2023 and 2022 was as follows (in thousands): Three Months Ended September 30, 2023 Financial Benefits National Corporate Total Revenue $ 298,372 $ 100,287 $ 11,880 $ — $ 410,539 Operating expenses 249,680 79,636 10,667 2,165 342,148 Gross margin 48,692 20,651 1,213 (2,165) 68,391 Corporate general and administrative expenses — — — 13,136 13,136 Operating income (loss) 48,692 20,651 1,213 (15,301) 55,255 Other income (expense): Interest expense — — — (5,848) (5,848) Gain on sale of operations, net 77 — — — 77 Other income (expense), net 1,497 267 — (4,052) (2,288) Total other income (expense), net 1,574 267 — (9,900) (8,059) Income (loss) before income tax expense $ 50,266 $ 20,918 $ 1,213 $ (25,201) $ 47,196 Three Months Ended September 30, 2022 Financial Benefits National Corporate Total Revenue $ 259,998 $ 92,067 $ 11,197 $ — $ 363,262 Operating expenses 220,337 73,321 9,743 2,616 306,017 Gross margin 39,661 18,746 1,454 (2,616) 57,245 Corporate general and administrative expenses — — — 15,893 15,893 Operating income (loss) 39,661 18,746 1,454 (18,509) 41,352 Other income (expense): Interest expense — (4) — (2,301) (2,305) Gain on sale of operations, net 176 — — — 176 Other income (expense), net 103 2,402 8 (5,135) (2,622) Total other income (expense), net 279 2,398 8 (7,436) (4,751) Income (loss) before income tax expense $ 39,940 $ 21,144 $ 1,462 $ (25,945) $ 36,601 Nine Months Ended September 30, 2023 Financial Benefits National Corporate Total Revenue $ 932,388 $ 296,179 $ 35,080 $ — $ 1,263,647 Operating expenses 737,568 234,933 31,795 22,850 1,027,146 Gross margin 194,820 61,246 3,285 (22,850) 236,501 Corporate general and administrative expenses — — — 44,527 44,527 Operating income (loss) 194,820 61,246 3,285 (67,377) 191,974 Other income (expense): Interest expense — (1) — (15,022) (15,023) Gain on sale of operations, net 176 — — — 176 Other income, net 1,987 597 1 5,660 8,245 Total other income (expense), net 2,163 596 1 (9,362) (6,602) Income (loss) before income tax expense $ 196,983 $ 61,842 $ 3,286 $ (76,739) $ 185,372 Nine Months Ended September 30, 2022 Financial Benefits National Corporate Total Revenue $ 808,052 $ 276,261 $ 32,623 $ — $ 1,116,936 Operating expenses (income) 639,780 220,998 29,218 (3,944) 886,052 Gross margin 168,272 55,263 3,405 3,944 230,884 Corporate general and administrative expenses — — — 43,128 43,128 Operating income (loss) 168,272 55,263 3,405 (39,184) 187,756 Other income (expense): Interest expense — (5) — (5,204) (5,209) Gain on sale of operations, net 311 — — — 311 Other income (expense), net 274 2,366 9 (27,581) (24,932) Total other income (expense), net 585 2,361 9 (32,785) (29,830) Income (loss) before income tax expense $ 168,857 $ 57,624 $ 3,414 $ (71,969) $ 157,926

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2023
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTSSubsequent to September 30, 2023, and up to October 24, 2023, we repurchased approximately 0.1 million shares of our common stock in the open market at a total cost of approximately $4.3 million. Effective October 16, 2023, we entered into a new 5-year interest rate swap with a notional value of $25 million and fixed rate of 4.488%.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Pay vs Performance Disclosure
Net income	$ 33,682	$ 27,470	$ 133,705	$ 116,852

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Sep. 30, 2023
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

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2023
Accounting Policies [Abstract]
Description of Business	Description of Business: CBIZ, Inc. is a diversified services company which, acting through its subsidiaries, has been providing professional business services since 1996, primarily to small and medium-sized businesses, as well as individuals, governmental entities, and not-for-profit enterprises throughout the United States and parts of Canada. CBIZ, Inc. manages and reports its operations along three practice groups: Financial Services, Benefits and Insurance Services and National Practices. A further description of products and services offered by each of the practice groups is provided in Note 12, Segment Disclosures, to the accompanying unaudited condensed consolidated financial statements.
Basis of Consolidation	Basis of Consolidation: The accompanying unaudited condensed consolidated financial statements include the operations of CBIZ, Inc. and all of its wholly-owned subsidiaries (“CBIZ”, the “Company”, “we”, “us”, or “our”), after elimination of all intercompany balances and transactions. These unaudited condensed consolidated financial statements do not reflect the operations or accounts of variable interest entities as the impact is not material to the financial condition, results of operations or cash flows of CBIZ.
Unaudited Interim Financial Statements	Unaudited Interim Financial Statements: The unaudited condensed consolidated financial statements have been prepared in accordance with GAAP and applicable rules and regulations of the Securities and Exchange Commission (the "SEC") regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. As such, the information included in this quarterly report on Form 10-Q should be read in conjunction with the consolidated financial statements and accompanying notes included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2022. In the opinion of CBIZ management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial condition, results of operations, and cash flows for the interim periods presented, but are not necessarily indicative of the results of operations to be anticipated for the full year ending December 31, 2023.
Use of Estimates	Use of Estimates: The preparation of unaudited condensed consolidated financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the amounts reported and disclosed in the financial statements and the accompanying notes. Changes in circumstances could cause actual results to differ materially from these estimates.
Changes in Accounting Policies	Changes in Accounting Policies: We have consistently applied the accounting policies for the periods presented as described in Note 1, Basis of Presentation and Significant Accounting Policies, to the
Reclassifications	Reclassifications: Certain prior period amounts have been reclassified to conform to current year's presentation.
New Accounting Pronouncements and Accounting Standards Adopted in 2023	NEW ACCOUNTING PRONOUNCEMENTS The FASB ASC is the sole source of authoritative GAAP other than the SEC issued rules and regulations that apply only to SEC registrants. The FASB issues an ASU to communicate changes to the FASB ASC. We assess and review the impact of all issued ASUs. During the nine months ended September 30, 2023, we have implemented all new ASUs that are in effect and that may impact our consolidated financial statements. Accounting Standards Adopted in 2023 In August 2023, the FASB issued ASU No. 2023-04, Liabilities (Topic 405): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 121 , which amended and added various SEC paragraphs in the ASC to reflect the issuance of SEC Staff Bulletin No. 121. We adopted ASU No. 2023-04 upon issuance and the adoption had no material impact on our condensed consolidated financial statements and related disclosures. In July 2023, the FASB issued ASU No. 2023-03, Presentation of Financial Statements (Topic 205), Income Statement - Reporting Comprehensive Income (Topic 220), Distinguishing Liabilities from Equity (Topic 480), Equity (Topic 505), and Compensation - Stock Compensation (Topic 718): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 120, SEC Staff Announcement at the March 24, 2022 EITF Meeting, and Staff Accounting Bulletin Topic 6.B, Accounting Series Release 280 - General Revision of Regulation S-X: Income or Loss Applicable to Common Stock,

Accounts Receivable, Net (Table

Accounts Receivable, Net (Tables)	9 Months Ended
	Sep. 30, 2023
Receivables [Abstract]
Schedule of Accounts Receivable, Net	Accounts receivable, net, at September 30, 2023 and December 31, 2022 was as follows (in thousands): September 30, December 31, Trade accounts receivable $ 301,331 $ 267,409 Unbilled revenue, at net realizable value 189,287 87,890 Total accounts receivable 490,618 355,299 Allowance for doubtful accounts (24,770) (20,801) Accounts receivable, net $ 465,848 $ 334,498
Schedule of Changes to the Allowance for Doubtful Accounts on Accounts Receivable	Changes to the allowance for doubtful accounts for the nine months ended September 30, 2023 and twelve months ended December 31, 2022 were as follows (in thousands): September 30, December 31, Balance at beginning of period $ (20,801) $ (16,158) Provision (8,867) (13,545) Charge-offs, net of recoveries 4,898 8,902 Allowance for doubtful accounts $ (24,770) $ (20,801)

Debt and Financing Arrangemen_2

Debt and Financing Arrangements (Tables)	9 Months Ended
	Sep. 30, 2023
Debt Disclosure [Abstract]
Summary of Unsecured Credit Facility	The combined effective interest rates under the 2018 and 2022 credit facilities, including the impact of interest rate swaps associated with those credit facilities, for the nine months ended September 30, 2023 and 2022 were as follows: Nine Months Ended 2023 2022 Weighted average rates 5.16% 2.29% Range of effective rates 1.93% - 8.00% 1.08% - 4.18%
Summary of Recognized Interest Expense	Interest expense, including amortization of deferred financing costs, commitment fees, line of credit fees, and other applicable bank charges, for the three and nine months ended September 30, 2023 and 2022 was as follows (in thousands): Three Months Ended September 30, 2023 2022 Credit facilities $ 5,848 $ 2,301 Other line of credit — 4 Total $ 5,848 $ 2,305 Nine Months Ended September 30, 2023 2022 Credit facilities $ 14,986 $ 5,204 Other line of credit — 5 Other 37 — Total $ 15,023 $ 5,209

Financial Instruments (Tables)

Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2023
Investments, All Other Investments [Abstract]
Summary of Investments	The following table summarizes activities related to these investments for the nine months ended September 30, 2023 and the twelve months ended December 31, 2022 (in thousands): Nine Months Ended September 30, 2023 Twelve Months Ended December 31, 2022 Fair value at beginning of period $ 43,485 $ 38,670 Purchases 2,472 19,771 Redemptions (3,310) (5,630) Maturities (3,505) (6,770) Change in bond premium (527) (645) Fair market value adjustment 713 (1,911) Fair value at end of period $ 39,328 $ 43,485
Summary of Outstanding Interest Rate Swaps	The following table summarizes our outstanding interest rate swaps and their classification in the accompanying unaudited Condensed Consolidated Balance Sheets at September 30, 2023 and December 31, 2022 (amounts in thousands): September 30, 2023 Notional Fixed Rate Expiration Fair Balance Sheet Location Interest rate swap $ 50,000 0.834 % 4/14/2025 $ 3,139 Other non-current asset Interest rate swap $ 30,000 1.186 % 12/14/2026 $ 2,973 Other non-current asset Interest rate swap $ 20,000 2.450 % 8/14/2027 $ 1,390 Other non-current asset Interest rate swap $ 25,000 3.669 % 4/14/2028 $ 681 Other non-current asset December 31, 2022 Notional Fixed Rate Expiration Fair Balance Sheet Location Interest rate swap $ 15,000 2.571 % 6/1/2023 $ 133 Other current asset Interest rate swap $ 50,000 0.834 % 4/14/2025 $ 3,726 Other non-current asset Interest rate swap $ 30,000 1.186 % 12/14/2026 $ 2,871 Other non-current asset Interest rate swap $ 20,000 2.450 % 8/14/2027 $ 1,079 Other non-current asset
Summary of Effects of Interest Rate Swap	The following table summarizes the effects of the interest rate swaps on the accompanying unaudited Condensed Consolidated Statements of Comprehensive Income for the three and nine months ended September 30, 2023 and 2022 (in thousands): Gain Recognized Gain (Loss) Reclassified Three Months Ended Three Months Ended 2023 2022 2023 2022 Interest rate swaps $ 1,163 $ 2,815 $ 1,122 $ 220 Nine Months Ended Nine Months Ended 2023 2022 2023 2022 Interest rate swaps $ 2,635 $ 6,009 $ 3,092 $ (278)

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2023
Fair Value Disclosures [Abstract]
Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis	The following table summarizes our assets and (liabilities) at September 30, 2023 and December 31, 2022, respectively, that are measured at fair value on a recurring basis subsequent to initial recognition and indicates the fair value hierarchy of the valuation techniques utilized by us to determine such fair value (in thousands): Level September 30, 2023 December 31, 2022 Deferred compensation plan assets 1 $ 130,284 $ 118,862 Available-for-sale debt securities 1 39,328 43,485 Other depository assets 1 519 868 Deferred compensation plan liabilities 1 (130,284) (118,862) Interest rate swaps 2 8,183 7,809 Contingent purchase price liabilities 3 (120,014) (132,010)
Summary of Change in Level 3 Fair Values of Contingent Purchase Price Liabilities	The following table summarizes the change in Level 3 fair values of our contingent purchase price liabilities for the nine months ended September 30, 2023 and 2022 (pre-tax basis) (in thousands): 2023 2022 Beginning balance – December 31 $ (132,010) $ (79,139) Additions from business acquisitions (32,142) (74,199) Settlement of contingent purchase price liabilities 46,209 14,047 Change in fair value of contingencies 58 461 Change in net present value of contingencies (2,129) (2,378) Ending balance – September 30 $ (120,014) $ (141,208)

Other Comprehensive Income (Tab

Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2023
Equity [Abstract]
Summary of Other Comprehensive Income and Tax Impact	The following table is a summary of other comprehensive income and discloses the tax impact of each component of other comprehensive income for the three and nine months ended September 30, 2023 and 2022 (in thousands): Three Months Ended Nine Months Ended 2023 2022 2023 2022 Net unrealized gain (loss) on available-for-sale securities, net of income taxes (1) $ 172 $ (457) $ 510 $ (1,614) Net unrealized gain on interest rate swaps, net of income taxes (2) 321 2,647 316 6,218 Foreign currency translation (6) (11) (15) (20) Total other comprehensive income $ 487 $ 2,179 $ 811 $ 4,584 (1) Net of income tax expense of $68 and income tax benefit of $171 for the three months ended September 30, 2023 and 2022, respectively, and net of income tax expense of $203 and income tax benefit of $604 for the nine months ended September 30, 2023 and 2022, respectively. (2) Net of income tax expense of $108 and income tax expense of $863 for the three months ended September 30, 2023 and 2022, respectively, and net of income tax expense of $94 and income tax expense of $2,041 for the nine months ended September 30, 2023 and 2022, respectively.

Employee Stock Plans (Tables)

Employee Stock Plans (Tables)	9 Months Ended
	Sep. 30, 2023
Share-Based Payment Arrangement [Abstract]
Schedule of Stock-Based Compensation Awards	Compensation expense for stock-based awards recognized during the three and nine months ended September 30, 2023 and 2022 was as follows (in thousands): Three Months Ended Nine Months Ended 2023 2022 2023 2022 Stock options $ — $ — $ 768 $ 248 Restricted stock units and awards 1,452 1,188 4,066 4,015 Performance share units 1,650 4,371 4,887 7,724 Total stock-based compensation expense $ 3,102 $ 5,559 $ 9,721 $ 11,987
Schedule of Stock Options, Restricted Stock Units and Awards, and Performance Share Units Activity	The following table presents our stock options and restricted stock units and awards activity during the nine months ended September 30, 2023 (in thousands, except per share data): Stock Options Restricted Stock Units and Awards Number of Weighted Average Exercise Price Per Share Number of Weighted Average Grant-Date Fair Value (1) Outstanding at beginning of year 553 $ 21.03 277 $ 32.62 Granted 50 $ 48.40 109 $ 48.64 Exercised or released (433) $ 19.34 (163) $ 31.63 Outstanding at September 30, 2023 170 $ 33.36 223 $ 41.19 Exercisable at September 30, 2023 170 $ 33.36 (1) Represents weighted average market value of the shares; awards are granted at no cost to the recipients. The following table presents our PSUs activity during the nine months ended September 30, 2023 (in thousands, except per share data): Performance Weighted Average Grant-Date Fair Value Per Unit (1) Outstanding at beginning of year 482 $ 28.84 Granted 88 $ 48.40 Vested (244) $ 25.75 Adjustments for performance results (2) 138 $ 27.68 Outstanding at September 30, 2023 464 $ 33.84 (1) Represents weighted average market value of the performance share units; PSUs are granted at no cost to the recipients.
Schedule of Fair Value Option Award Weighted Average Assumptions Used	The following weighted average assumptions were utilized: Nine Months Ended September 30, 2023 Expected volatility (1) 28.57% Expected option life (years) (2) 4.74 Risk-free interest rate (3) 3.89% Expected dividend yield (4) —% (1) The expected volatility assumption was determined based upon the historical volatility of CBIZ's stock price using daily price intervals. (2) The expected option life was determined based upon CBIZ's historical data using a midpoint scenario, which assumes all options are exercised halfway between the expiration date and the weighted average time it takes the option to vest. (3) The risk-free interest rate assumption was based upon zero-coupon U.S. treasury bonds with a term approximating the expected life of the respective options.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2023
Earnings Per Share [Abstract]
Summary of Computation of Basic and Diluted Earnings Per Share	The following table sets forth the computation of basic and diluted earnings per share for the three and nine months ended September 30, 2023 and 2022 (in thousands, except per share data): Three Months Ended Nine Months Ended 2023 2022 2023 2022 Numerator: Net Income $ 33,682 $ 27,470 $ 133,705 $ 116,852 Denominator: Basic Weighted average common shares outstanding 49,838 51,457 50,054 51,827 Diluted Stock options (1) 148 434 206 523 Restricted stock units and awards (1) 96 118 95 141 Performance share units 277 205 277 205 Contingent shares (2) 12 24 12 24 Diluted weighted average common shares outstanding (3) 50,371 52,238 50,644 52,720 Basic earnings per share $ 0.68 $ 0.53 $ 2.67 $ 2.25 Diluted earnings per share $ 0.67 $ 0.53 $ 2.64 $ 2.22 (1) A total of 60 thousand shares of stock-based awards were excluded from the calculation of diluted earnings per share for nine months ended September 30, 2023, as their effect would be anti-dilutive. A total of 72 thousand shares of stock-based awards were excluded from the calculation of diluted earnings per share for the nine months ended September 30, 2022, as their effect would be anti-dilutive. No stock-based awards were excluded from the calculation of diluted earnings per share for the three months ended September 30, 2023 and 2022, as their effect was dilutive. (2) Contingent shares represent additional shares to be issued for purchase price earned by former owners of businesses acquired by us once future considerations have been met. Refer to Note 11, Business Combinations, for further details. (3) The denominator used in calculating diluted earnings per share did not include 187 thousand PSUs for both the three and nine months ended September 30, 2023, and the denominator used in calculating diluted earnings per share did not include 237 thousand PSUs for both the three and nine months ended September 30, 2022. The performance conditions associated with these performance share units were not met and consequently none of these PSUs were considered as issuable for the three and nine months ended September 30, 2023 and 2022.

Business Combinations (Tables)

Business Combinations (Tables)	9 Months Ended
	Sep. 30, 2023
Business Combination and Asset Acquisition [Abstract]
Summary of Aggregated Consideration and Purchase Price Allocation	The following table summarizes the consideration and purchase price allocation for the acquisitions completed during the nine months ended September 30, 2023 and 2022, respectively (in thousands): 2023 2022 Common stock issued (number) 102 42 Common stock value $ 4,796 $ 1,668 Cash paid 53,027 79,141 Recorded contingent consideration 32,142 74,199 Total recorded purchase price $ 89,965 $ 155,008 Accounts receivable acquired 8,539 20,429 Fixed assets acquired 1,108 1,933 Identifiable intangible assets acquired 35,267 53,400 Operating lease right-of-use asset acquired 14,972 49,291 Other assets acquired 1,163 1,693 Operating lease liability acquired - current (1,080) (5,860) Other current liabilities acquired (1,366) (1,594) Operating lease liability acquired - non-current (13,892) (43,431) Goodwill 45,254 79,147 Total net assets acquired $ 89,965 $ 155,008 Maximum potential contingent consideration $ 33,845 $ 77,075
Summary of Segment Allocation	The following table summarizes the goodwill and intangible asset amounts resulting from those acquisitions for the nine months ended September 30, 2023 and 2022, respectively (in thousands): Nine Months Ended September 30, 2023 2022 Financial Services Benefits and Insurance Services Financial Services Benefits and Insurance Services Goodwill $ 41,322 $ 3,932 $ 79,147 $ — Client list 33,196 2,053 53,400 — Other intangibles 18 — — — Total $ 74,536 $ 5,985 $ 132,547 $ —
Summary of Contingent Consideration	The following table summarizes the changes in contingent purchase price consideration for previous acquisitions and contingent payments made for previous business acquisitions in the three and nine months ended September 30, 2023 and 2022, respectively (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 Net expense $ 626 $ 440 $ 2,071 $ 1,917 Cash settlement paid $ 10,103 $ 4,167 $ 39,910 $ 12,289 Shares issued (number) 54 26 129 45

Segment Disclosures (Tables)

Segment Disclosures (Tables)	9 Months Ended
	Sep. 30, 2023
Segment Reporting [Abstract]
Summary of Disaggregation of Revenue by Source	The following table disaggregates our revenue by source (in thousands): Three Months Ended September 30, 2023 Financial Benefits and National Consolidated Accounting, tax, advisory and consulting $ 298,372 — — $ 298,372 Core benefits and insurance services — 95,951 — 95,951 Non-core benefits and insurance services — 4,336 — 4,336 Managed networking, hardware services — — 9,205 9,205 National practices consulting — — 2,675 2,675 Total revenue $ 298,372 $ 100,287 $ 11,880 $ 410,539 Three Months Ended September 30, 2022 Financial Benefits and National Consolidated Accounting, tax, advisory and consulting $ 259,998 — — $ 259,998 Core benefits and insurance services — 88,364 — 88,364 Non-core benefits and insurance services — 3,703 — 3,703 Managed networking, hardware services — — 8,514 8,514 National practices consulting — — 2,683 2,683 Total revenue $ 259,998 $ 92,067 $ 11,197 $ 363,262 Nine Months Ended September 30, 2023 Financial Benefits and National Consolidated Accounting, tax, advisory and consulting $ 932,388 — — $ 932,388 Core benefits and insurance services — 283,599 — 283,599 Non-core benefits and insurance services — 12,580 — 12,580 Managed networking, hardware services — — 27,226 27,226 National practices consulting — — 7,854 7,854 Total revenue $ 932,388 $ 296,179 $ 35,080 $ 1,263,647 Nine Months Ended September 30, 2022 Financial Benefits and National Consolidated Accounting, tax, advisory and consulting $ 808,052 — — $ 808,052 Core benefits and insurance services — 264,666 — 264,666 Non-core benefits and insurance services — 11,595 — 11,595 Managed networking, hardware services — — 24,768 24,768 National practices consulting — — 7,855 7,855 Total revenue $ 808,052 $ 276,261 $ 32,623 $ 1,116,936
Summary of Segment Information	Segment information for the three months ended September 30, 2023 and 2022 was as follows (in thousands): Three Months Ended September 30, 2023 Financial Benefits National Corporate Total Revenue $ 298,372 $ 100,287 $ 11,880 $ — $ 410,539 Operating expenses 249,680 79,636 10,667 2,165 342,148 Gross margin 48,692 20,651 1,213 (2,165) 68,391 Corporate general and administrative expenses — — — 13,136 13,136 Operating income (loss) 48,692 20,651 1,213 (15,301) 55,255 Other income (expense): Interest expense — — — (5,848) (5,848) Gain on sale of operations, net 77 — — — 77 Other income (expense), net 1,497 267 — (4,052) (2,288) Total other income (expense), net 1,574 267 — (9,900) (8,059) Income (loss) before income tax expense $ 50,266 $ 20,918 $ 1,213 $ (25,201) $ 47,196 Three Months Ended September 30, 2022 Financial Benefits National Corporate Total Revenue $ 259,998 $ 92,067 $ 11,197 $ — $ 363,262 Operating expenses 220,337 73,321 9,743 2,616 306,017 Gross margin 39,661 18,746 1,454 (2,616) 57,245 Corporate general and administrative expenses — — — 15,893 15,893 Operating income (loss) 39,661 18,746 1,454 (18,509) 41,352 Other income (expense): Interest expense — (4) — (2,301) (2,305) Gain on sale of operations, net 176 — — — 176 Other income (expense), net 103 2,402 8 (5,135) (2,622) Total other income (expense), net 279 2,398 8 (7,436) (4,751) Income (loss) before income tax expense $ 39,940 $ 21,144 $ 1,462 $ (25,945) $ 36,601 Nine Months Ended September 30, 2023 Financial Benefits National Corporate Total Revenue $ 932,388 $ 296,179 $ 35,080 $ — $ 1,263,647 Operating expenses 737,568 234,933 31,795 22,850 1,027,146 Gross margin 194,820 61,246 3,285 (22,850) 236,501 Corporate general and administrative expenses — — — 44,527 44,527 Operating income (loss) 194,820 61,246 3,285 (67,377) 191,974 Other income (expense): Interest expense — (1) — (15,022) (15,023) Gain on sale of operations, net 176 — — — 176 Other income, net 1,987 597 1 5,660 8,245 Total other income (expense), net 2,163 596 1 (9,362) (6,602) Income (loss) before income tax expense $ 196,983 $ 61,842 $ 3,286 $ (76,739) $ 185,372 Nine Months Ended September 30, 2022 Financial Benefits National Corporate Total Revenue $ 808,052 $ 276,261 $ 32,623 $ — $ 1,116,936 Operating expenses (income) 639,780 220,998 29,218 (3,944) 886,052 Gross margin 168,272 55,263 3,405 3,944 230,884 Corporate general and administrative expenses — — — 43,128 43,128 Operating income (loss) 168,272 55,263 3,405 (39,184) 187,756 Other income (expense): Interest expense — (5) — (5,204) (5,209) Gain on sale of operations, net 311 — — — 311 Other income (expense), net 274 2,366 9 (27,581) (24,932) Total other income (expense), net 585 2,361 9 (32,785) (29,830) Income (loss) before income tax expense $ 168,857 $ 57,624 $ 3,414 $ (71,969) $ 157,926

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Details)	9 Months Ended
	Sep. 30, 2023 practice_group
Accounting Policies [Abstract]
Number of practice groups	3

Accounts Receivable, Net - Sche

Accounts Receivable, Net - Schedule of Accounts Receivables Net (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Dec. 31, 2021
Receivables [Abstract]
Trade accounts receivable	$ 301,331	$ 267,409
Unbilled revenue, at net realizable value	189,287	87,890
Total accounts receivable	490,618	355,299
Allowance for doubtful accounts	(24,770)	(20,801)	$ (16,158)
Accounts receivable, net	$ 465,848	$ 334,498

Accounts Receivable, Net - Sc_2

Accounts Receivable, Net - Schedule of Changes to the Allowance for Doubtful Accounts on Accounts Receivable (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ (20,801)	$ (16,158)
Provision	(8,867)	(13,545)
Charge-offs, net of recoveries	4,898	8,902
Allowance for doubtful accounts	$ (24,770)	$ (20,801)

Debt and Financing Arrangemen_3

Debt and Financing Arrangements - Additional Information (Details) - USD ($)	Sep. 30, 2023	Dec. 31, 2022	May 04, 2022	May 03, 2022
Debt Instrument [Line Items]
Outstanding balance under applicable credit facility	$ 394,700,000	$ 265,700,000
Outstanding letters of credit	4,400,000	5,000,000
Other line of credit
Debt Instrument [Line Items]
Revolving loan commitment	20,000,000
Outstanding line of credit	0
2022 Credit Facility
Debt Instrument [Line Items]
Revolving loan commitment			$ 600,000,000	$ 400,000,000
Revolving loan, accordion feature			200,000,000
Outstanding balance under applicable credit facility	394,700,000	$ 265,700,000
Available funds under credit facility	195,000,000
Outstanding letters of credit	$ 4,400,000
2022 Credit Facility | Swing Line Facility
Debt Instrument [Line Items]
Revolving loan commitment			$ 50,000,000	$ 25,000,000

Debt and Financing Arrangemen_4

Debt and Financing Arrangements - Summary of Unsecured Credit Facility (Details) - 2018 and 2022 Credit Facilities	Sep. 30, 2023	Sep. 30, 2022
Debt Instrument [Line Items]
Weighted average rates	5.16%	2.29%
Minimum
Debt Instrument [Line Items]
Range of effective rates	1.93%	1.08%
Maximum
Debt Instrument [Line Items]
Range of effective rates	8%	4.18%

Debt and Financing Arrangemen_5

Debt and Financing Arrangements - Summary of Recognized Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Debt Instrument [Line Items]
Total	$ 5,848	$ 2,305	$ 15,023	$ 5,209
Credit facilities
Debt Instrument [Line Items]
Total	5,848	2,301	14,986	5,204
Other line of credit
Debt Instrument [Line Items]
Total	$ 0	$ 4	0	5
Other
Debt Instrument [Line Items]
Total			$ 37	$ 0

Commitments and Contingencies -

Commitments and Contingencies - Letters of Credit and Guarantees (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Letters of credit outstanding	$ 4.4	$ 5
License bonds outstanding amount	$ 2.3	$ 2.3

Commitments and Contingencies_2

Commitments and Contingencies - Legal Proceedings (Details) - CBIZ Operations and a former employee of CBIZ MMP $ in Millions	Dec. 19, 2016 USD ($)
Commitments And Contingencies [Line Items]
Total transaction price	$ 200
Maximum
Commitments And Contingencies [Line Items]
Damages sought amount	$ 177

Financial Instruments - Additio

Financial Instruments - Additional Information (Details) $ in Thousands	3 Months Ended
	Jun. 30, 2023 USD ($) swap	Mar. 31, 2023 USD ($)	Sep. 30, 2023 USD ($) swap	Dec. 31, 2022 USD ($)
Debt Securities, Available-for-sale [Line Items]
Par value of available-for-sale debt securities			$ 40,000	$ 44,400
Funds held for clients			$ 122,531	$ 171,313
Interest rate swap, April 2028 expiration
Debt Securities, Available-for-sale [Line Items]
Interest rate swap, fixed interest rate			3.669%
Interest rate swap, June 2023 expiration
Debt Securities, Available-for-sale [Line Items]
Interest rate swap, fixed interest rate				2.571%
Number of instruments expired | swap	1
Interest rate swap
Debt Securities, Available-for-sale [Line Items]
Number of interest rate swaps outstanding | swap			4
Other non-current asset | Interest rate swap, April 2028 expiration
Debt Securities, Available-for-sale [Line Items]
Term of contract		5 years
Notional amount, asset		$ 25,000
Interest rate swap, fixed interest rate		3.669%
Other current asset | Interest rate swap, June 2023 expiration
Debt Securities, Available-for-sale [Line Items]
Notional amount, asset	$ 15,000			$ 15,000
Certified Deposits and Other Depository Assets
Debt Securities, Available-for-sale [Line Items]
Funds held for clients			$ 500	$ 900

Financial Instruments - Summary

Financial Instruments - Summary of Investments (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Debt Securities, Available for Sale [Roll Forward]
Fair value at beginning of period	$ 43,485	$ 38,670
Purchases	2,472	19,771
Redemptions	(3,310)	(5,630)
Maturities	(3,505)	(6,770)
Change in bond premium	(527)	(645)
Fair market value adjustment	713	(1,911)
Fair value at end of period	$ 39,328	$ 43,485

Financial Instruments - Summa_2

Financial Instruments - Summary of Outstanding Interest Rate Swaps (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Interest rate swap, June 2023 expiration
Derivatives, Fair Value [Line Items]
Interest rate swap, fixed interest rate			2.571%
Interest rate swap, June 2023 expiration | Other current asset
Derivatives, Fair Value [Line Items]
Notional amount, asset		$ 15,000	$ 15,000
Fair value, asset			$ 133
Interest rate swap, April 2025 expiration
Derivatives, Fair Value [Line Items]
Interest rate swap, fixed interest rate	0.834%		0.834%
Interest rate swap, April 2025 expiration | Other non-current asset
Derivatives, Fair Value [Line Items]
Notional amount, asset	$ 50,000		$ 50,000
Fair value, asset	$ 3,139		$ 3,726
Interest rate swap, December 2026 expiration
Derivatives, Fair Value [Line Items]
Interest rate swap, fixed interest rate	1.186%		1.186%
Interest rate swap, December 2026 expiration | Other non-current asset
Derivatives, Fair Value [Line Items]
Notional amount, asset	$ 30,000		$ 30,000
Fair value, asset	$ 2,973		$ 2,871
Interest rate swap, August 2027 expiration
Derivatives, Fair Value [Line Items]
Interest rate swap, fixed interest rate	2.45%		2.45%
Interest rate swap, August 2027 expiration | Other non-current asset
Derivatives, Fair Value [Line Items]
Notional amount, asset	$ 20,000		$ 20,000
Fair value, asset	$ 1,390		$ 1,079
Interest rate swap, April 2028 expiration
Derivatives, Fair Value [Line Items]
Interest rate swap, fixed interest rate	3.669%
Interest rate swap, April 2028 expiration | Other non-current asset
Derivatives, Fair Value [Line Items]
Notional amount, asset	$ 25,000
Fair value, asset	$ 681

Financial Instruments - Summa_3

Financial Instruments - Summary of Effects of Interest Rate Swaps (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Derivatives, Fair Value [Line Items]
Gain Recognized in AOCI, net of tax	$ 321	$ 2,647	$ 316	$ 6,218
Interest rate swap
Derivatives, Fair Value [Line Items]
Gain Recognized in AOCI, net of tax	1,163	2,815	2,635	6,009
Gain (Loss) Reclassified from AOCI into Expense	$ 1,122	$ 220	$ 3,092	$ (278)

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan assets	$ 130,284	$ 118,862
Available-for-sale debt securities	39,328	43,485	$ 38,670
Deferred compensation plan liabilities	(130,284)	(118,862)
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan assets	130,284	118,862
Available-for-sale debt securities	39,328	43,485
Other depository assets	519	868
Deferred compensation plan liabilities	(130,284)	(118,862)
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps	8,183	7,809
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent purchase price liabilities	$ (120,014)	$ (132,010)

Fair Value Measurements - Chang

Fair Value Measurements - Change in Level 3 Fair Values of Contingent Purchase Price Liabilities (Details) - Contingent purchase price liabilities - Level 3 - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ (132,010)	$ (79,139)
Additions from business acquisitions	(32,142)	(74,199)
Settlement of contingent purchase price liabilities	46,209	14,047
Change in fair value of contingencies	58	461
Change in net present value of contingencies	(2,129)	(2,378)
Ending balance	$ (120,014)	$ (141,208)

Other Comprehensive Income (Det

Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Equity [Abstract]
Net unrealized gain (loss) on available-for-sale securities, net of income taxes	$ 172	$ (457)	$ 510	$ (1,614)
Net unrealized gain on interest rate swaps, net of income taxes	321	2,647	316	6,218
Foreign currency translation	(6)	(11)	(15)	(20)
Total other comprehensive income	487	2,179	811	4,584
Unrealized gain (loss) on available-for-sale securities, income tax expense (benefit)	68	(171)	203	(604)
Unrealized gain (loss) on interest rate swaps, income tax expense	$ 108	$ 863	$ 94	$ 2,041

Employee Stock Plans - Addition

Employee Stock Plans - Additional Information (Details) - $ / shares shares in Millions		9 Months Ended
	Feb. 08, 2023	Sep. 30, 2023	May 10, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of stock options granted (in dollars per share)	$ 15.35
Performance share units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, remaining contractual term		3 years
Performance share units, vesting period		3 years
Achievement of an earnings per share target		70%
Achievement of total growth in revenue		30%
Performance share units | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of initial grant		200%
2019 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional shares authorized for issuance (in shares)			1.5
Maximum stock based compensation awards granted under the plan (in shares)			4.6

Employee Stock Plans - Schedule

Employee Stock Plans - Schedule of Stock-Based Compensation Awards (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Share-Based Payment Arrangement [Abstract]
Stock options	$ 0	$ 0	$ 768	$ 248
Restricted stock units and awards	1,452	1,188	4,066	4,015
Performance share units	1,650	4,371	4,887	7,724
Total stock-based compensation expense	$ 3,102	$ 5,559	$ 9,721	$ 11,987

Employee Stock Plans - Schedu_2

Employee Stock Plans - Schedule of Stock Options Award Activity (Details) - $ / shares shares in Thousands	9 Months Ended
	Sep. 30, 2023
Stock Options, Number of Options
Outstanding at beginning of period (in shares)	553
Granted (in shares)	50
Exercised or released (in shares)	(433)
Outstanding at end of period (in shares)	170
Exercisable at end of period (in shares)	170
Stock Options, Weighted Average Exercise Price Per Share
Outstanding at beginning of period (in dollars per share)	$ 21.03
Granted (in dollars per share)	48.40
Exercised or released (in dollars per share)	19.34
Outstanding at end of period (in dollars per share)	33.36
Exercisable at end of period (in dollars per share)	$ 33.36

Employee Stock Plans - Schedu_3

Employee Stock Plans - Schedule of Restricted Stock Units and Awards Activity (Details) - Restricted Stock Units and Awards shares in Thousands	9 Months Ended
	Sep. 30, 2023 $ / shares shares
Restricted Stock Units and Awards, Number of Shares
Outstanding at beginning of period (in shares) | shares	277
Granted (in shares) | shares	109
Exercised or released (in shares) | shares	(163)
Outstanding at end of period (in shares) | shares	223
Restricted Stock Units and Awards, Weighted Average Grant-Date Fair Value
Outstanding at beginning of period (in dollars per share) | $ / shares	$ 32.62
Granted (in dollars per share) | $ / shares	48.64
Exercised or released (in dollars per share) | $ / shares	31.63
Outstanding at end of period (in dollars per share) | $ / shares	$ 41.19

Employee Stock Plans - Schedu_4

Employee Stock Plans - Schedule of Fair Value Option Award Weighted Average Assumptions Used (Details)	9 Months Ended
	Sep. 30, 2023
Share-Based Payment Arrangement [Abstract]
Expected volatility	28.57%
Expected option life (years)	4 years 8 months 26 days
Risk-free interest rate	3.89%
Expected dividend yield	0%

Employee Stock Plans - Schedu_5

Employee Stock Plans - Schedule of Performance Share Units Activity (Details) - Performance share units shares in Thousands	9 Months Ended
	Sep. 30, 2023 $ / shares shares
Performance Share Units
Outstanding at beginning of period (in shares) | shares	482
Granted (in shares) | shares	88
Vested (in shares) | shares	(244)
Adjustments for performance results (in shares) | shares	138
Outstanding at end of period (in shares) | shares	464
Weighted Average Grant-Date Fair Value Per Unit
Outstanding at beginning of period (in dollars per share) | $ / shares	$ 28.84
Granted (in dollars per share) | $ / shares	48.40
Vested (in dollars per share) | $ / shares	25.75
Adjustments for performance results (in dollars per share) | $ / shares	27.68
Outstanding at end of period (in dollars per share) | $ / shares	$ 33.84

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Numerator:
Net Income	$ 33,682	$ 27,470	$ 133,705	$ 116,852
Basic
Weighted average common shares outstanding (in shares)	49,838,000	51,457,000	50,054,000	51,827,000
Diluted
Stock options (in shares)	148,000	434,000	206,000	523,000
Restricted stock units and awards (in shares)	96,000	118,000	95,000	141,000
Performance share units (in shares)	277,000	205,000	277,000	205,000
Contingent shares (in shares)	12,000	24,000	12,000	24,000
Diluted weighted average common shares outstanding (in shares)	50,371,000	52,238,000	50,644,000	52,720,000
Basic earnings per share (in dollars per share)	$ 0.68	$ 0.53	$ 2.67	$ 2.25
Diluted earnings per share (in dollars per share)	$ 0.67	$ 0.53	$ 2.64	$ 2.22
Share-based payment arrangement
Dilutive Securities Included And Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Share based awards excluded from the calculation of diluted earnings per share (in shares)	0	0	60,000	72,000
PSU
Dilutive Securities Included And Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Share based awards excluded from the calculation of diluted earnings per share (in shares)	187,000	237,000	187,000	237,000

Business Combinations - Additio

Business Combinations - Additional Information (Details) $ in Thousands		3 Months Ended		9 Months Ended
	Jul. 01, 2023 client	Sep. 30, 2023 USD ($) business	Sep. 30, 2022 USD ($) business	Sep. 30, 2023 USD ($) business	Sep. 30, 2022 USD ($) business
Business Acquisition, Contingent Consideration [Line Items]
Number of clients from acquiree | client	1,200
Annualized revenue				$ 67,300
Transaction and integration related costs				3,100
Proceeds from sales of divested operations				1,696	$ 2,906
Financial Services practice group
Business Acquisition, Contingent Consideration [Line Items]
Gain on disposition of business		$ 1,400		$ 1,500
Number of businesses sold | business		1		1
Benefits and Insurance Services
Business Acquisition, Contingent Consideration [Line Items]
Gain on disposition of business			$ 2,400		$ 2,400
Number of businesses sold | business			1		1
Proceeds from sales of divested operations			$ 2,500		$ 2,500
Client list
Business Acquisition, Contingent Consideration [Line Items]
Acquired finite-lived intangible assets, useful life				10 years
Other intangibles
Business Acquisition, Contingent Consideration [Line Items]
Acquired finite-lived intangible assets, useful life				3 years

Business Combinations - Aggrega

Business Combinations - Aggregated Consideration And Preliminary Purchase Price Allocation (Details) - Series of Individually Immaterial Business Acquisitions - USD ($) shares in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Business Acquisition, Contingent Consideration [Line Items]
Common stock issued (in shares)	102	42
Common stock value	$ 4,796	$ 1,668
Cash paid	53,027	79,141
Recorded contingent consideration	32,142	74,199
Total recorded purchase price	89,965	155,008
Accounts receivable acquired	8,539	20,429
Fixed assets acquired	1,108	1,933
Identifiable intangible assets acquired	35,267	53,400
Operating lease right-of-use asset acquired	14,972	49,291
Other assets acquired	1,163	1,693
Operating lease liability acquired - current	(1,080)	(5,860)
Other current liabilities acquired	(1,366)	(1,594)
Operating lease liability acquired - non-current	(13,892)	(43,431)
Goodwill	45,254	79,147
Total net assets acquired	89,965	155,008
Maximum potential contingent consideration	$ 33,845	$ 77,075

Business Combinations - Segment

Business Combinations - Segment Allocation (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 30, 2022
Financial Services
Business Combination Segment Allocation [Line Items]
Goodwill	$ 41,322	$ 79,147
Total	74,536	132,547
Financial Services | Client list
Business Combination Segment Allocation [Line Items]
Intangibles	33,196	53,400
Financial Services | Other intangibles
Business Combination Segment Allocation [Line Items]
Intangibles	18	0
Benefits and Insurance Services
Business Combination Segment Allocation [Line Items]
Goodwill	3,932	0
Total	5,985	0
Benefits and Insurance Services | Client list
Business Combination Segment Allocation [Line Items]
Intangibles	2,053	0
Benefits and Insurance Services | Other intangibles
Business Combination Segment Allocation [Line Items]
Intangibles	$ 0	$ 0

Business Combinations - Changes

Business Combinations - Changes in Contingent Purchase Price Consideration (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Business Combination and Asset Acquisition [Abstract]
Net expense	$ 626	$ 440	$ 2,071	$ 1,917
Cash settlement paid	$ 10,103	$ 4,167	$ 39,910	$ 12,289
Shares issued (number)	54	26	129	45

Segment Disclosures - Additiona

Segment Disclosures - Additional Information (Details)	9 Months Ended
	Sep. 30, 2023 segment
Segment Reporting [Abstract]
Number of business units of the company	3

Segment Disclosures - Summary o

Segment Disclosures - Summary of Disaggregation of Revenue by Source (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Revenue	$ 410,539	$ 363,262	$ 1,263,647	$ 1,116,936
Financial Services
Disaggregation of Revenue [Line Items]
Revenue	298,372	259,998	932,388	808,052
Benefits and Insurance Services
Disaggregation of Revenue [Line Items]
Revenue	100,287	92,067	296,179	276,261
National Practices
Disaggregation of Revenue [Line Items]
Revenue	11,880	11,197	35,080	32,623
Accounting, tax, advisory and consulting
Disaggregation of Revenue [Line Items]
Revenue	298,372	259,998	932,388	808,052
Accounting, tax, advisory and consulting | Financial Services
Disaggregation of Revenue [Line Items]
Revenue	298,372	259,998	932,388	808,052
Accounting, tax, advisory and consulting | Benefits and Insurance Services
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Accounting, tax, advisory and consulting | National Practices
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Core benefits and insurance services
Disaggregation of Revenue [Line Items]
Revenue	95,951	88,364	283,599	264,666
Core benefits and insurance services | Financial Services
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Core benefits and insurance services | Benefits and Insurance Services
Disaggregation of Revenue [Line Items]
Revenue	95,951	88,364	283,599	264,666
Core benefits and insurance services | National Practices
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Non-core benefits and insurance services
Disaggregation of Revenue [Line Items]
Revenue	4,336	3,703	12,580	11,595
Non-core benefits and insurance services | Financial Services
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Non-core benefits and insurance services | Benefits and Insurance Services
Disaggregation of Revenue [Line Items]
Revenue	4,336	3,703	12,580	11,595
Non-core benefits and insurance services | National Practices
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Managed networking, hardware services
Disaggregation of Revenue [Line Items]
Revenue	9,205	8,514	27,226	24,768
Managed networking, hardware services | Financial Services
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Managed networking, hardware services | Benefits and Insurance Services
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Managed networking, hardware services | National Practices
Disaggregation of Revenue [Line Items]
Revenue	9,205	8,514	27,226	24,768
National practices consulting
Disaggregation of Revenue [Line Items]
Revenue	2,675	2,683	7,854	7,855
National practices consulting | Financial Services
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
National practices consulting | Benefits and Insurance Services
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
National practices consulting | National Practices
Disaggregation of Revenue [Line Items]
Revenue	$ 2,675	$ 2,683	$ 7,854	$ 7,855

Segment Disclosures - Summary_2

Segment Disclosures - Summary of Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Revenue	$ 410,539	$ 363,262	$ 1,263,647	$ 1,116,936
Operating expenses (income)	342,148	306,017	1,027,146	886,052
Gross margin	68,391	57,245	236,501	230,884
Corporate general and administrative expenses	13,136	15,893	44,527	43,128
Operating income	55,255	41,352	191,974	187,756
Other income (expense):
Interest expense	(5,848)	(2,305)	(15,023)	(5,209)
Gain on sale of operations, net	77	176	176	311
Other income (expense), net	(2,288)	(2,622)	8,245	(24,932)
Total other expense, net	(8,059)	(4,751)	(6,602)	(29,830)
Income before income tax expense	47,196	36,601	185,372	157,926
Financial Services
Segment Reporting Information [Line Items]
Revenue	298,372	259,998	932,388	808,052
Benefits and Insurance Services
Segment Reporting Information [Line Items]
Revenue	100,287	92,067	296,179	276,261
National Practices
Segment Reporting Information [Line Items]
Revenue	11,880	11,197	35,080	32,623
Operating segments | Financial Services
Segment Reporting Information [Line Items]
Revenue	298,372	259,998	932,388	808,052
Operating expenses (income)	249,680	220,337	737,568	639,780
Gross margin	48,692	39,661	194,820	168,272
Corporate general and administrative expenses	0	0	0	0
Operating income	48,692	39,661	194,820	168,272
Other income (expense):
Interest expense	0	0	0	0
Gain on sale of operations, net	77	176	176	311
Other income (expense), net	1,497	103	1,987	274
Total other expense, net	1,574	279	2,163	585
Income before income tax expense	50,266	39,940	196,983	168,857
Operating segments | Benefits and Insurance Services
Segment Reporting Information [Line Items]
Revenue	100,287	92,067	296,179	276,261
Operating expenses (income)	79,636	73,321	234,933	220,998
Gross margin	20,651	18,746	61,246	55,263
Corporate general and administrative expenses	0	0	0	0
Operating income	20,651	18,746	61,246	55,263
Other income (expense):
Interest expense	0	(4)	(1)	(5)
Gain on sale of operations, net	0	0	0	0
Other income (expense), net	267	2,402	597	2,366
Total other expense, net	267	2,398	596	2,361
Income before income tax expense	20,918	21,144	61,842	57,624
Operating segments | National Practices
Segment Reporting Information [Line Items]
Revenue	11,880	11,197	35,080	32,623
Operating expenses (income)	10,667	9,743	31,795	29,218
Gross margin	1,213	1,454	3,285	3,405
Corporate general and administrative expenses	0	0	0	0
Operating income	1,213	1,454	3,285	3,405
Other income (expense):
Interest expense	0	0	0	0
Gain on sale of operations, net	0	0	0	0
Other income (expense), net	0	8	1	9
Total other expense, net	0	8	1	9
Income before income tax expense	1,213	1,462	3,286	3,414
Corporate and Other
Segment Reporting Information [Line Items]
Revenue	0	0	0	0
Operating expenses (income)	2,165	2,616	22,850	(3,944)
Gross margin	(2,165)	(2,616)	(22,850)	3,944
Corporate general and administrative expenses	13,136	15,893	44,527	43,128
Operating income	(15,301)	(18,509)	(67,377)	(39,184)
Other income (expense):
Interest expense	(5,848)	(2,301)	(15,022)	(5,204)
Gain on sale of operations, net	0	0	0	0
Other income (expense), net	(4,052)	(5,135)	5,660	(27,581)
Total other expense, net	(9,900)	(7,436)	(9,362)	(32,785)
Income before income tax expense	$ (25,201)	$ (25,945)	$ (76,739)	$ (71,969)

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ in Thousands, shares in Millions		1 Months Ended	3 Months Ended		9 Months Ended
	Oct. 16, 2023	Oct. 24, 2023	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Subsequent Event [Line Items]
Share repurchases, value			$ 9,472	$ 32,422	$ 58,000	$ 67,976
Subsequent Event
Subsequent Event [Line Items]
Share repurchases (in shares)		0.1
Share repurchases, value		$ 4,300
Subsequent Event | Interest Rate Swap, Five Year, 4.488%
Subsequent Event [Line Items]
Term of contract	5 years
Notional amount	$ 25,000
Interest rate swap, fixed interest rate	4.488%