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Consolidated financial statements (Tables)
3 Months Ended
Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Impact of revision on consolidated statement of cash flows
The impact of the revisions on the consolidated statement of cash flows for the quarter ended March 31, 2020 was as follows:

(in thousands)Previously reportedAdjustmentRevised
Accounts payable$(18,059)$7,914 $(10,145)
Net cash provided by operating activities18,554 7,914 26,468 
Purchases of capital assets(6,355)(7,914)(14,269)
Net cash used by investing activities(6,001)(7,914)(13,915)
Proceeds from issuing long-term debt1,011,000 (702,000)309,000 
Payments on long-term debt(754,500)702,000 (52,500)
Net cash provided by financing activities211,156 — 211,156 
Net change in cash, cash equivalents, restricted cash and restricted cash equivalents$210,992 $— $210,992