v3.26.1
UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Cash flows from operating activities:    
Net income $ 63,201 $ 58,680
Adjustments to reconcile net income to net cash from operating activities:    
Depreciation and amortization 115,799 111,980
Allowance for doubtful accounts 2,919 2,825
Amortization of deferred financing costs and debt discount 1,307 1,666
Accretion of environmental liabilities 3,542 3,620
Changes in environmental liability estimates (1,635) (9,863)
Other expense, net 731 932
Stock-based compensation 9,578 7,635
Environmental expenditures (4,086) (2,591)
Changes in assets and liabilities, net of acquisitions:    
Accounts receivable and unbilled accounts receivable (104,781) (74,576)
Inventories and supplies 7,803 8,670
Other current and non-current assets 7,513 (6,983)
Accounts payable (40,814) (10,989)
Other current and long-term liabilities (54,780) (89,401)
Net cash from operating activities 6,297 1,605
Cash flows used in investing activities:    
Additions to property, plant and equipment (98,443) (118,695)
Proceeds from sale and disposal of fixed assets 1,522 1,343
Acquisition, net of cash acquired (131,820) 0
Additions to intangible assets including costs to obtain or renew permits (159) (248)
Purchases of available-for-sale securities (16,142) (24,186)
Proceeds from sale of available-for-sale securities 22,319 21,456
Net cash used in investing activities (222,723) (120,330)
Cash flows used in financing activities:    
Change in uncashed checks (7,556) (1,714)
Tax payments related to withholdings on vested restricted stock (9,303) (8,688)
Repurchases of common stock (25,000) (55,000)
Deferred financing costs paid (643) 0
Payments on finance leases (12,601) (10,081)
Principal payments on debt (3,150) (3,776)
Net cash used in financing activities (58,253) (79,259)
Effect of exchange rate change on cash (3,642) 209
Decrease in cash and cash equivalents (278,321) (197,775)
Cash and cash equivalents, beginning of period 826,315 687,192
Cash and cash equivalents, end of period 547,994 489,417
Cash payments for interest and income taxes:    
Interest paid 38,435 56,671
Income taxes paid, net of refunds 7,916 9,280
Non-cash investing activities:    
Property, plant and equipment accrued 39,903 12,462
ROU assets obtained in exchange for operating lease liabilities 24,399 15,638
ROU assets obtained in exchange for finance lease liabilities $ 4,592 $ 27,181