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Financial Instruments
 3 Months Ended
Mar. 31, 2020
Cash and Cash Equivalents [Abstract]  
Financial Instruments
Financial Instruments
Cash, Cash Equivalents and Restricted Cash
The carrying value of cash and cash equivalents approximate fair value and are as follows (in thousands):
 
 
March 31,
 
December 31,
 
 
2020
 
2019
As Held:
 
 
 
 
Cash
 
$
82,484

 
$
100,773

Money market funds
 
271,435

 
276,615

 
 
$
353,919

 
$
377,388

As Reported:
 
 
 
 
Cash and cash equivalents
 
$
180,307

 
$
202,823

Restricted cash
 
173,612

 
174,565

 
 
$
353,919

 
$
377,388


Restricted cash consisted of the following (in thousands):
 
 
March 31,
 
December 31,
 
 
2020
 
2019
Current:
 
 
 
 
Restricted cash
 
$
27,256

 
$
28,494

Restricted cash related to PPA Entities 1
 
2,474

 
2,310

Restricted cash, current
 
$
29,730

 
$
30,804

Non-current:
 
 
 
 
Restricted cash
 
$
10

 
$
10

Restricted cash related to PPA Entities 1
 
143,872

 
143,751

Restricted cash, non-current
 
143,882

 
143,761

 
 
$
173,612

 
$
174,565


1 We have variable interest entities which represent a portion of the consolidated balances recorded within the "restricted cash," and other financial statement line items in the Consolidated Balance Sheets (see Note 13, Power Purchase Agreement Programs). This amount includes $108.7 million and $20.0 million of non-current restricted cash, held in PPA II and PPA IIIb entities, respectively, and as of December 31, 2019, these entities are no longer considered variable interest entities.
Derivative Instruments
We have derivative financial instruments related to natural gas fixed price forward contracts, embedded derivatives in sales contracts, and interest rate swaps. See Note 8, Derivative Financial Instruments for a full description of our derivative financial instruments.