Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2023

Schedule of Employee Deferred Compensation Plans

The following table presents the Company’s (income) loss from investments held in employee deferred compensation trusts (in thousands):


	Year Ended December 31,
	2023		2022		2021
Dividend income	$	(15,049)	$	(12,637)	$	(23,719)
Realized and unrealized (gains) losses	(72,971)		98,776		(37,359)
(Income) loss from investments held in employee deferred compensation trusts	$	(88,020)	$	86,139	$	(61,078)

Schedule of Allocation of Plan Assets

The following table summarizes the Company’s financial instruments by significant category and fair value measurement on a recurring basis (in thousands):


			Fair Value Measurements Using
	Balance at December 31, 2023		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)

Cash equivalents
Money market funds	$	351,230	$	351,230	—	—

Employee deferred compensation trust assets
Money market funds	$	124,710	$	124,710	—	—
Mutual funds - bonds	35,373		35,373		—	—
Mutual funds - stocks	316,764		316,764		—	—
Mutual funds - blend	94,199		94,199		—	—
Total employee deferred compensation trust assets	$	571,046	$	571,046	—	—

			Fair Value Measurements Using
	Balance at December 31, 2022		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)

Cash equivalents
Money market funds	$	344,745	$	344,745	—	—

Employee deferred compensation trust assets
Money market funds	$	77,730	$	77,730	—	—
Mutual funds - bonds	31,096		31,096		—	—
Mutual funds - stocks	245,908		245,908		—	—
Mutual funds - blend	78,000		78,000		—	—
Total employee deferred compensation trust assets	$	432,734	$	432,734	—	—

Schedule of Accounts Receivable, Allowance for Credit Loss

The following table sets forth the activity in the allowance for credit losses from December 31, 2021, through December 31, 2023 (in thousands):


	Allowance for Credit Losses


Balance as of December 31, 2021	$	21,530
Charges to expense	8,771
Deductions	(7,091)
Other, including translation adjustments	(649)
Balance as of December 31, 2022	$	22,561
Charges to expense	8,752
Deductions	(6,486)
Other, including translation adjustments	362
Balance as of December 31, 2023	$	25,189

Schedule of Depreciation Expense Computed Using Straight-Line Method over Useful Lives

Depreciation is computed using the straight-line method over the following useful lives:


Computer hardware			2 to 3 years
Computer software			2 to 5 years
Furniture and equipment			3 to 5 years
Leasehold improvements			Term of lease

Property and equipment consisted of the following (in thousands):


	December 31,
	2023		2022
Computer hardware	$	150,165	$	160,028
Computer software	220,004		219,863
Furniture and equipment	99,547		96,601
Leasehold improvements	187,806		171,893

Property and equipment, cost	657,522		648,385
Accumulated depreciation	(548,713)		(538,698)
Property and equipment, net	$	108,809	$	109,687