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Supplemental Cash Flow Information (Tables)
3 Months Ended
Mar. 31, 2021
Supplemental Cash Flow Elements [Abstract]  
Change in certain working capital accounts
The following table presents additional information about the change in certain working capital accounts:
Three Months Ended 
March 31,
(in thousands)20212020
Accounts receivable$43,559 $8,850 
Other current assets1,851 (11,969)
Accounts payable6,342 14,034 
Accrued employee compensation and benefits(19,387)(13,711)
Accrued interest7,687 (1,172)
Other accrued liabilities(16,151)15,041 
Unearned revenue(5,672)(3,130)
Other, net22,816 863 
Total$41,045 $8,806