Annual report pursuant to Section 13 and 15(d)

FAIR VALUE MEASUREMENTS (Tables)

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FAIR VALUE MEASUREMENTS (Tables)
12 Months Ended
Dec. 31, 2019
Fair Value Disclosures [Abstract]  
Fair Value of Assets and Liabilities Measured on Recurring Basis
In accordance with the fair value hierarchy described above, the following table shows the fair value of our financial assets and liabilities that are required to be measured at fair value on a recurring basis, which are classified on the balance sheets as cash and cash equivalents, other current assets, other current liabilities and other long-term liabilities:
  Fair Value Measurements 
 
at December 31, 2019
Fair Value Measurements 
 
at December 31, 2018
  Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total
    (in thousands)     (in thousands)  
Assets:
Cash equivalents $ 177,159    $ —    $ —    $ 177,159    $ 86,046    $ —    $ —    $ 86,046   
Forward currency contracts
—    11    —    11    —    779    —    779   
Total $ 177,159    $ 11    $ —    $ 177,170    $ 86,046    $ 779    $ —    $ 86,825   
Liabilities:
Forward currency contracts
$ —    $ 1,159    $ —    $ 1,159    $ —    $ 260    $ —    $ 260   
Put option
—    —    8,006    8,006    —    —    8,002    8,002   
Subsidiary equity awards
—    —    7,661    7,661    —    —    3,571    3,571   
Contingent consideration
—    —    64,892    64,892    —    —    62,475    62,475   
Total $ —    $ 1,159    $ 80,559    $ 81,718    $ —    $ 260    $ 74,048    $ 74,308   
Fair Value of Debt The following table presents the estimated fair values of our senior notes and convertible senior notes at December 31, 2019 and 2018:
Estimated Fair Value at:
December 31, 2019 December 31, 2018
Level 2
(in thousands)
4.75% Senior Notes Due 2027 $ 983,735    $ —   
4.875% Senior Notes due 2024 $ 596,137    $ 552,368   
5.625% Senior Notes due 2026 $ 320,553    $ 302,097   
5.375% Senior Notes due 2022 $ —    $ 251,390   
2.5% Convertible Senior Notes due 2023 $ 675,664    $ 561,699   
2.5% Convertible Senior Notes due 2019 $ —    $ 40,710   
Fair Value of Assets Measured on a Non-recurring Basis
The following table shows the fair value of our financial assets that have been adjusted to fair value on a non-recurring basis which had a significant impact on our results of operations for the years ended December 31, 2019 and 2018:
  Fair Value Fair Value Measurements Using Loss
Description Measurement Level 1 Level 2 Level 3 (Gain)
  (in thousands)
2019
Definite-lived intangible assets, net $ —    $ —    $ —    $ —    $ 26,751   
2018
Goodwill $ 20,332    $ —    $ —    $ 20,332    $ 10,500