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Accounting for Derivative Instruments and Hedging Activities (Tables)
9 Months Ended
Sep. 30, 2021
Accounting for Derivative Instruments and Hedging Activities [Abstract]  
Income Statement Effects of Financial Instruments
The effect of financial instruments are recorded in other expenses, net in the consolidated statements of operations and consisted of the following.
Three Months Ended September 30, Nine Months Ended September 30,
2021202020212020
Change in fair value of cross-currency derivative instruments
$(111)$135 $(133)$(230)
Foreign currency remeasurement of Sterling Notes to U.S. dollars
47 (66)26 45 
Gain (loss) on financial instruments, net$(64)$69 $(107)$(185)