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Financial Instruments
3 Months Ended
Mar. 31, 2023
Fair Value Disclosures [Abstract]  
Financial Instruments Financial Instruments
The following tables present the carrying amounts and estimated fair values of our financial instruments by hierarchy level as of March 31, 2023 and December 31, 2022:
March 31, 2023
Hierarchy Level
(Fair Value)
Carrying
Amount
Level 1Level 2Level 3
Liabilities
Acquisition-related contingent consideration (1)
$13,080 $— $— $13,080 
2023 Convertible Notes (2)
315,583 — 616,368 — 
Total$328,663 $— $616,368 $13,080 
December 31, 2022
Hierarchy Level
(Fair Value)
Carrying
Amount
Level 1Level 2Level 3
Liabilities   
Acquisition-related contingent consideration (1)
$14,988 $— $— $14,988 
2023 Convertible Notes (2)
315,172 — 509,682 — 
Total$330,160 $— $509,682 $14,988 
(1)The short-term portion is included in “Accounts payable, accrued expenses and other” and the long-term portion is included in “Other liabilities” on the Condensed Consolidated Balance Sheets.
(2)The carrying amount includes unamortized deferred debt issuance costs.
The fair values of financial instruments not included in the tables above are estimated to be equal to their carrying values as of March 31, 2023 and December 31, 2022.
We estimate the fair value of our 2023 Convertible Notes based on their last actively traded prices. The fair value of our 2023 Convertible Notes is classified within Level 2 of the fair value hierarchy because it is traded in less active markets.
We estimate the fair value of acquisition-related contingent consideration using either a probability-weighted discounted cash flow model or a Monte Carlo pricing model. These fair value estimates represent Level 3 measurements as they are based on significant inputs not observed in the market and reflect our own assumptions. Significant increases (or decreases) in these unobservable inputs in isolation would result in significantly lower (or higher) fair values. We reassess the fair value of our acquisition-related contingent consideration at each reporting period based on additional information as it becomes available.
The change in our liability for our Level 3 financial instruments is as follows:
Contingent Consideration
Balance at December 31, 2022$14,988 
Accretion expense (1)
$1,284 
Payments(3,430)
Foreign currency translation adjustment (2)
238 
Balance at March 31, 2023$13,080 
Contingent Consideration
Balance at December 31, 2021$15,110 
Additions$5,370 
Accretion expense (1)
(979)
Payments(4,430)
Foreign currency translation adjustment (2)
(115)
Balance at March 31, 2022$14,956 
(1)Accretion expense is included in SG&A expenses on the Condensed Consolidated Statements of Comprehensive Income.
(2)Foreign currency translation adjustments are included in “Other comprehensive income (loss), net of tax” on the Condensed Consolidated Statements of Comprehensive Income.