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Fair Value Measurements | 12 Months Ended
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Dec. 31, 2020
Fair Value Disclosures [Abstract] |
Fair Value Measurements | FAIR VALUE MEASUREMENTS For disclosure purposes, we utilize a fair value hierarchy to categorize qualifying assets and liabilities into three broad levels based on the priority of the inputs used to determine their fair values. The hierarchy, which gives the highest priority to unadjusted quoted prices in active markets for identical assets and liabilities and the lowest priority to unobservable inputs, is comprised of the following three levels: Level 1 – Unadjusted quoted prices in active markets for identical assets and liabilities. Level 2 – Observable inputs, other than Level 1 inputs, that are directly or indirectly observable for the asset or liability, including quoted prices for similar assets and liabilities in active markets; quoted prices for identical or similar assets or liabilities in markets that are not active; and model-derived valuations whose inputs are observable or whose significant value drivers are observable. Level 3 – Unobservable inputs that reflect the reporting entity’s own assumptions. Recurring Fair Value Measurements The following tables provide the assets and liabilities carried at fair value measured on a recurring basis as of December 31, 2020 and 2019 (in thousands):
| Assets at Fair Value as of December 31, 2020
Asset Category | Level 1 |  | Level 2 |  | Level 3 |  | Total
Cash and cash equivalents (1) | $ | 902,867 |  |  | $ | — |  |  | $ | — |  |  | $ | 902,867 |
Restricted cash (2) | 695 |  |  | — |  |  | — |  |  | 695 |
Deferred compensation plan assets (3) | 36,491 |  |  | — |  |  | — |  |  | 36,491 |
Total | $ | 940,053 |  |  | $ | — |  |  | $ | — |  |  | $ | 940,053 |
| Assets at Fair Value as of December 31, 2019
Asset Category | Level 1 |  | Level 2 |  | Level 3 |  | Total
Cash and cash equivalents (1) | $ | 358,818 |  |  | $ | — |  |  | $ | — |  |  | $ | 358,818 |
Restricted cash (2) | 1,102 |  |  | — |  |  | — |  |  | 1,102 |
Deferred compensation plan assets (3) | 30,295 |  |  | — |  |  | — |  |  | 30,295 |
Total | $ | 390,215 |  |  | $ | — |  |  | $ | — |  |  | $ | 390,215 |
_________________ (1)Cash and cash equivalents consist of deposit accounts and money market funds with original maturity dates of three months or less, which are Level 1 assets. At December 31, 2020 and 2019, we had $482.2 million and $164.0 million, respectively, in money market funds. (2)Restricted cash is classified as “Prepaid expenses and other” in the Consolidated Balance Sheets. Restricted cash primarily represents cash held in account for use on customer contracts. (3)Deferred compensation plan assets are classified as “Other assets” in the Consolidated Balance Sheets. Nonrecurring Fair Value Measurements We have recorded goodwill and identifiable intangible assets in connection with our business acquisitions. Such assets are measured at fair value at the time of acquisition based on valuation techniques that appropriately represent the methods which would be used by other market participants in determining fair value. Periodically, we engage an independent third-party valuation specialist to assist with the valuation process, including the selection of appropriate methodologies and the development of market-based assumptions. In addition, goodwill and intangible assets are tested for impairment using similar valuation methodologies to determine the fair value of such assets. As of December 31, 2020, we had goodwill related to our United States industrial services segment of $107.5 million accounted for at fair value on a nonrecurring basis as a result of the non-cash goodwill impairment charge recorded during the year. Refer to Note 9 - Goodwill, Identifiable Intangible Assets, and Other Long-Lived Assets of the notes to consolidated financial statements for a description of the valuation techniques and inputs used in the fair value measurement. The inputs used for these nonrecurring fair value measurements represent Level 3 inputs. NOTE 11 - FAIR VALUE MEASUREMENTS - (Continued) Fair Value of Financial Instruments We believe that the carrying values of our financial instruments, which include accounts receivable and other financing commitments, approximate their fair values due primarily to their short-term maturities and low risk of counterparty default. The carrying value of our debt associated with the 2020 Credit Agreement approximates its fair value due to the variable rate on such debt.

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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