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Fair Value Measurements
12 Months Ended
Dec. 31, 2021
Fair Value Measurements  
Fair Value Measurements

5. Fair value measurements

Securities reported at fair value utilizing Level 1 inputs represent assets whose fair value is determined based upon observable unadjusted quoted market prices for identical assets in active markets. Level 2 securities represent assets whose fair value is determined using observable market information such as previous day trade prices, quotes from less active markets or quoted prices of securities with similar characteristics.  Available-for-sale securities are characterized as Level 2 assets, as their fair values are determined using observable market inputs. Equity securities are characterized as Level 1 assets, as their fair values are determined using active markets for identical assets. There were no transfers between Level 1, Level 2, or Level 3 for the year ended December 31, 2021.

Financial instruments not recorded at fair value on a recurring basis include equity method investments that have not been remeasured or impaired in the current period, such as our investments in HyVia and AccionaPlug S.L.

The following table summarizes the carrying amount and estimated fair value of the Company’s financial instruments at December 31, 2021 and 2020 (in thousands):

As of December 31, 2021

Carrying

Fair

Fair Value Measurements

Amount

Value

Level 1

Level 2

Level 3

Assets

Cash equivalents

$

115,241

$

115,241

$

115,241

$

$

Corporate bonds

226,382

226,382

226,382

U.S. Treasuries

1,013,883

1,013,883

1,013,883

Equity securities

147,995

147,995

147,995

Swaps and forward contracts

70

70

70

Liabilities

Contingent consideration

62,297

62,297

62,297

Convertible senior notes

192,633

1,129,765

1,129,765

Long-term debt

128,046

129,437

129,437

Finance obligations

253,684

253,684

253,684

Swaps and forward contracts

981

981

981

As of December 31, 2020

Carrying

Fair

Fair Value Measurements

Amount

Value

Level 1

Level 2

Level 3

Liabilities

Contingent consideration

9,760

9,760

9,760

Convertible senior notes

85,640

1,272,766

1,272,766

Long-term debt

175,402

175,402

175,402

Finance obligations

181,553

181,553

181,553