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Summary of Significant Accounting Policies (Tables) | 3 Months Ended
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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 |

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- Definition Tabular disclosure of pension and other postretirement benefit arrangements with individual employees, which are generally based on employment contracts between the entity and one or more selected officers or key employees, and which contain a promise by the employer to pay certain amounts at designated future dates, usually including a period after retirement, upon compliance with stipulated requirements. This type of arrangement is distinguished from broader based employee benefit plans as it is usually tailored to the employee. Disclosure also typically includes the amount of related compensation expense recognized during the reporting period and the carrying amount as of the balance sheet date of the related liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 30 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6409875&loc=d3e20015-108363 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 25 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6409733&loc=d3e19512-108361 + Details
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- Definition Tabular disclosure of the major categories of plan assets of pension plans and/or other employee benefit plans. This information may include, but is not limited to, the target allocation of plan assets, the fair value of each major category of plan assets, and the level within the fair value hierarchy in which the fair value measurements fall. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(5) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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