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Debt (Tables)
 3 Months Ended
Mar. 31, 2022
Debt Disclosure [Abstract]  
Company's Borrowings
The following table shows the Company’s term debt:
   March 31, 2022December 31, 2021
5.875% Senior Secured Green Notes, due 2028
$550,000 $550,000 
Less: Debt issuance costs (net of accumulated amortization of $1,892 and $1,376, respectively)
12,727 13,243 
Total long-term debt$537,273 $536,757 
Revolving Line of Credit
The following table shows the Company's line of credit:
March 31, 2022December 31, 2021
Amount outstanding under line of credit$— $— 
Maximum available to be borrowed under line of credit$249,095 $249,666