v3.25.2
UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Cash flows from operating activities:    
Net income $ 185,585 $ 203,112
Adjustments to reconcile net income to net cash from operating activities:    
Depreciation and amortization 228,265 195,569
Allowance for doubtful accounts 3,249 4,349
Amortization of deferred financing costs and debt discount 3,352 2,937
Accretion of environmental liabilities 7,211 6,521
Changes in environmental liability estimates (8,954) 3,963
Deferred income taxes 0 (88)
Other expense, net 1,535 1,308
Stock-based compensation 13,698 14,853
Environmental expenditures (7,051) (9,934)
Changes in assets and liabilities, net of acquisitions:    
Accounts receivable and unbilled accounts receivable (116,399) (116,307)
Inventories and supplies 2,952 (28,673)
Other current and long-term assets (13,395) (28,870)
Accounts payable (36,035) (12,418)
Other current and long-term liabilities (54,368) (1,728)
Net cash from operating activities 209,645 234,594
Cash flows used in investing activities:    
Additions to property, plant and equipment (208,724) (273,023)
Proceeds from sale and disposal of fixed assets 4,063 4,295
Acquisitions, net of cash acquired 0 (477,201)
Proceeds from sale of business 0 750
Additions to intangible assets including costs to obtain or renew permits (777) (1,868)
Purchases of available-for-sale securities (45,622) (55,318)
Proceeds from sale of available-for-sale securities 50,318 71,695
Net cash used in investing activities (200,742) (730,670)
Cash flows (used in) from financing activities:    
Change in uncashed checks (2,767) (1,868)
Tax payments related to withholdings on vested restricted stock (10,456) (4,599)
Repurchases of common stock (67,001) (10,215)
Proceeds from employee stock purchase plan 3,360 0
Deferred financing costs paid 0 (8,148)
Payments on finance leases (16,754) (11,491)
Principal payments on debt (7,551) (7,551)
Proceeds from issuance of debt, net of discount 0 499,375
Net cash (used in) from financing activities (101,169) 455,503
Effect of exchange rate change on cash 5,260 (2,133)
Decrease in cash and cash equivalents (87,006) (42,706)
Cash and cash equivalents, beginning of period 687,192 444,698
Cash and cash equivalents, end of period 600,186 401,992
Cash payments for interest and income taxes:    
Interest paid 76,570 74,079
Income taxes paid, net of refunds 64,534 70,307
Non-cash investing activities:    
Property, plant and equipment accrued 25,156 28,315
ROU assets obtained in exchange for operating lease liabilities 34,867 49,420
ROU assets obtained in exchange for finance lease liabilities $ 57,802 $ 45,174