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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Cash flows from operating activities:    
Net income (loss) $ (84,573) $ 274,416
Adjustments to reconcile net income to net cash provided by operating activities:    
Loss on disposal of assets and impairments 420,169 18,924
Depreciation 302,051 303,623
Amortization of intangibles 63,409 61,886
Amortization of leases 9,863 13,183
Deferred income taxes, net of acquisitions (66,821) 18,911
Amortization of debt issuance costs 4,783 2,414
Share-based compensation 24,643 26,763
Interest accretion 8,512 8,143
Adjustments to contingent consideration 16,794 1,466
Other 1,596 (1,514)
Net change in operating assets and liabilities, net of acquisitions 52,759 24,833
Net cash provided by operating activities 753,185 753,048
Cash flows from investing activities:    
Payments for acquisitions, net of cash acquired (86,325) (381,422)
Capital expenditures for property and equipment (268,711) (253,790)
Capital expenditure for undeveloped landfill property (16,450)  
Proceeds from disposal of assets 10,642 1,198
Change in restricted investments, net of interest income 4,532 (6,206)
Other (3,644) (70)
Net cash used in investing activities (359,956) (640,290)
Cash flows from financing activities:    
Proceeds from long-term debt 1,790,625 1,016,154
Principal payments on notes payable and long-term debt (1,484,118) (1,134,589)
Payment of contingent consideration recorded at acquisition date (2,251) (550)
Change in book overdraft (606) (534)
Payments for repurchase of common shares (105,654)  
Payments for cash dividends (96,912) (84,215)
Tax withholdings related to net share settlements of equity-based compensation (23,291) (17,264)
Debt issuance costs (10,957) (5,838)
Proceeds from sale of common shares held in trust 679 3,695
Other   (117)
Net cash provided by (used in) financing activities 67,515 (223,258)
Effect of exchange rate changes on cash, cash equivalents and restricted cash (541) 270
Net increase in cash, cash equivalents and restricted cash 460,203 (110,230)
Cash, cash equivalents and restricted cash at beginning of period 423,221 403,966
Cash, cash equivalents and restricted cash at end of period 883,424 293,736
Non-cash financing activities:    
Liabilities assumed and notes payable issued to sellers of businesses acquired $ 53,433 $ 105,584