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Financial Instruments
3 Months Ended
Mar. 31, 2020
Fair Value Disclosures [Abstract]  
Financial Instruments Financial Instruments
Financial assets
The maximum exposure to credit risk at the end of each reported period is represented by the carrying amount of financial assets, and summarized in the following table:
December 31, 2019March 31, 2020
(in thousands)
Trade receivables, net of allowance481,732  364,440  
Other taxes60,924  65,293  
Other current assets17,225  19,832  
Non-current financial assets21,747  20,373  
Total$581,628  $469,938  

Credit Risk
We maintain an allowance for estimated credit losses. During the twelve-month period ended December 31, 2019 and the three-month period ended March 31, 2020, our net change in allowance for credit losses was $9.9 million and $(7.0) million, respectively (note 4). The primary cause of this change was the adoption of ASU 2016-13, Financial Instruments - Credit Losses (Topic 326) effective January 1, 2020 resulting in an earlier recognition of credit losses, the cumulative effect of which, was recorded as an adjustment to retained earnings for $3.5 million (note 1).
For our financial assets, the fair value approximates the carrying amount, given the nature of the financial assets and the maturity of the expected cash flows.
Trade Receivables
Credit risk is defined as an unexpected loss in cash and earnings if the client is unable to pay its obligations in due time. We perform internal ongoing credit risk evaluations of our clients. When a possible risk exposure is identified, we require prepayments or pause the provision of services until payment of past due receivables is made.
As of December 31, 2019 and March 31, 2020, no customer accounted for 10% or more of trade receivables.
Financial Liabilities
December 31, 2019March 31, 2020
(in thousands)
Trade payables $390,277  $300,315  
Other taxes50,099  49,159  
Employee-related payables 74,781  73,251  
Other current liabilities35,886  35,709  
Financial liabilities4,405  2,858  
Total$555,448  $461,292  

For our financial liabilities, the fair value approximates the carrying amount, given the nature of the financial liabilities and the maturity of the expected cash flows.
We are party to several loan agreements and a revolving credit facility, or RCF, with third-party financial institutions. There have been no significant changes from what was disclosed in Note 12 to the consolidated financial statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2019.
Fair Value Measurements  
We measure the fair value of our cash equivalents, which include interest-bearing bank deposits, as level 2 measurements because they are valued using observable market data.
Financial assets or liabilities include derivative financial instruments used to manage our exposure to the risk of exchange rate fluctuations. These instruments are considered level 2 financial instruments as they are measured using valuation techniques based on observable market data.

Derivative Financial Instruments
Derivatives consist of foreign currency forward contracts that we use to hedge intercompany transactions and other monetary assets or liabilities denominated in currencies other than the local currency of a subsidiary. We recognize gains and losses on these contracts in financial income (expense), and their position on the balance sheet is based on their fair value at the end of each respective period. These instruments are considered level 2 financial instruments as they are measured using valuation techniques based on observable market data.

December 31, 2019March 31, 2020
(in thousands)
Derivative Assets:
Included in other current assets $—  $105  
Derivative Liabilities:
Included in financial liabilities - current portion$1,284  $—  

For our derivative financial instruments, the fair value approximates the carrying amount, given the nature of the derivative financial instruments and the maturity of the expected cash flows.
Cash and Cash Equivalents
The following table presents for each reporting period, the breakdown of cash and cash equivalents:
December 31, 2019March 31, 2020
(in thousands)
Cash equivalents$189,119  $169,569  
Cash on hand229,644  266,937  
Total cash and cash equivalents$418,763  $436,506  

Investments in interest–bearing bank deposits which meet ASC 230—Statement of Cash flows criteria: short-term, highly liquid investments, for which the risks of changes in value are considered to be insignificant. Interest-bearing bank deposits are considered level 2 financial instruments as they are measured using valuation techniques based on observable market data.
For our cash and cash equivalents, the fair value approximates the carrying amount, given the nature of the cash and cash equivalents and the maturity of the expected cash flows.