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Supplemental Cash Flow Information
 12 Months Ended
Dec. 31, 2021
Supplemental Cash Flow Elements [Abstract]  
Supplemental Cash Flow Information Supplemental Cash Flow Information
The following table provides a reconciliation of cash, cash equivalents and restricted cash and cash equivalents with the Company’s consolidated balance sheet that sum to the total of such amounts shown in the consolidated statements of cash flows:
Year Ended December 31,
(Thousands of U.S. Dollars)202120202019
Cash and cash equivalents$26,109 $13,687 $8,301 
Restricted cash and cash equivalents - current392 427 516 
Restricted cash and cash equivalents - long-term (1)
4,903 3,409 2,258 
$31,404 $17,523 $11,075 

(1) The long-term portion of restricted cash is included in other long-term assets on the Company's balance sheet.

Net changes in assets and liabilities from operating activities were as follows:
 Year Ended December 31,
(Thousands of U.S. Dollars)202120202019
Accounts receivable and other long-term assets$(5,686)$27,607 $(5,680)
Derivatives(5,808)2,302 (638)
Inventory(2,383)(2,628)(3,179)
Other prepaids(199)(279)583 
Accounts payable and accrued and other long-term liabilities48,206 (47,194)(1,367)
Prepaid tax and taxes receivable and payable25,024 56,254 (83,593)
Net changes in assets and liabilities from operating activities$59,154 $36,062 $(93,874)

The following table provides additional supplemental cash flow disclosures:
Year Ended December 31,
(Thousands of U.S. Dollars)202120202019
Cash paid for income taxes$36,352 $14,611 $49,196 
Cash paid for interest$50,109 $50,209 $37,767 
Non-cash investing activities  
Net liabilities related to property, plant and equipment, end of year$30,142 $28,711 $77,353