Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2021

Accounting Policies [Abstract]

Schedule of Company's Income from Investments Held in Employee Deferred Compensation Trusts

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

	Three Months Ended March 31,
	2021		2020
Dividend income	$	(294)	$	(405)
Realized and unrealized (gains) losses	(11,694)		40,781
(Income) loss from investments held in employee deferred compensation trusts	$	(11,988)	$	40,376

Composition of Underlying Assets Comprising Company's Deferred Compensation Plan Assets

The following table sets forth the composition of the underlying assets which comprise the Company’s deferred compensation trust assets (in thousands):

	Fair Value Measurements Using
	Balance at March 31, 2021		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)
Assets
Money market funds	$	64,655	$	64,655	—	—
Mutual funds - bond	28,719		28,719		—	—
Mutual funds - stock	250,163		250,163		—	—
Mutual funds - blend	80,500		80,500		—	—
	$	424,037	$	424,037	—	—
	Fair Value Measurements Using
	Balance at December 31, 2020		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)
Assets
Money market funds	$	69,681	$	69,681	—	—
Mutual funds - bond	27,282		27,282		—	—
Mutual funds - stock	234,667		234,667		—	—
Mutual funds - blend	75,004		75,004		—	—
	$	406,634	$	406,634	—	—

Schedule of Credit Losses

The following table sets forth the activity in the allowance for credit losses from December 31, 2019, through March 31, 2021 (in thousands):

	Allowance for Credit Losses
Balance as of December 31, 2019	$	22,885
Adoption of accounting pronouncement	558
Balance as of January 1, 2020	$	23,443
Charges to expense	4,200
Deductions	(7,906)
Other, including translation adjustments	(120)
Balance as of December 31, 2020	$	19,617
Charges to expense	3,157
Deductions	(1,482)
Other, including translation adjustments	(973)
Balance as of March 31, 2021	$	20,319