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Fair Value of Financial Instruments
9 Months Ended
Sep. 30, 2019
Fair Value Disclosures [Abstract]  
Fair Value of Financial Instruments Fair Value of Financial Instruments
The Company records its financial assets and liabilities at fair value. The accounting standard for fair value (i) defines fair value as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the measurement date, (ii) establishes a framework for measuring fair value, (iii) establishes a hierarchy of fair value measurements based upon the ability to observe inputs used to value assets and liabilities, (iv) requires consideration of nonperformance risk, and (v) requires disclosures about the methods used to measure fair value. The accounting standard establishes a three-level hierarchy of measurements based upon the reliability of observable and unobservable inputs used to arrive at fair value. Observable inputs are independent market data, while unobservable inputs reflect the Company’s assumptions about valuation. The three levels of the hierarchy are defined as follows:
Level 1: Observable inputs such as quoted prices in active markets for identical assets and liabilities;
Level 2: Inputs other than quoted prices that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active, and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets; and
Level 3: Valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable.
The carrying amounts of the Company’s financial instruments, which include financial assets such as cash and cash equivalents, restricted cash equivalents, accounts receivable, net, and certain other current assets, as well as financial liabilities such as accounts payable, accrued service costs, accrued compensation and benefits and certain other accrued expenses, approximate their fair values, due to the short-term nature of these instruments. See Note 21, Derivative Financial Instruments, for a discussion of the fair value of the Company's forward currency derivative contracts.

The Company believes the carrying value of the senior term loan entered into in 2019 (see Note 11, Debt) approximates fair value as it is variable rate bank debt. The fair value of the Company's senior term loan entered into in 2018 was estimated based on the quoted market prices for the same or similar issue, and was considered a Level 2 measurement. The fair value of the Company's subordinated notes issued in 2018 was estimated based on market indications compared to the inputs of the existing agreement and was considered a Level 2 measurement.