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Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Cash flows from operating activities: |  |  |
Net income | $ 605,668 | $ 463,774 | $ 295,765
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 230,357 | 205,763 | 189,867
Loss on sale of property and equipment | 477 | 1,274 | 168
Deferred income taxes | 57,709 | (82,639) | 34,808
Share-based compensation | 4,894 | 3,242 | 1,410
Changes in assets and liabilities: |  |  |
Customer and other receivables, net | (34,666) | (76,353) | (11,176)
Prepaid expenses and other assets | (12,003) | (12,885) | (21,227)
Accounts payable | 4,789 | (15,487) | 22,442
Compensation, benefits and other accrued liabilities | 47,552 | 25,330 | 4,965
Claims and insurance accruals | 8,142 | 1,843 | 6,548
Income taxes, net | (17,813) | (4,939) | 21,184
Other liabilities | 5,010 | 27,371 | 20,829
Net cash provided by operating activities | 900,116 | 536,294 | 565,583
Cash flows from investing activities: |  |  |
Purchase of property and equipment | (588,292) | (382,125) | (417,941)
Proceeds from sale of property and equipment | 6,983 | 12,240 | 10,541
Other investing activities, net | 918 | 2,139 |
Net cash used in investing activities | (580,391) | (367,746) | (407,400)
Cash flows from financing activities: |  |  |
Principal payments under long-term debt agreements | (50,000) |  | (26,488)
Net payments on revolving line of credit |  | (9,975) | (2,342)
Dividends paid | (42,566) | (32,925) |
Payments for share repurchases | (163,265) | (8,013) | (130,316)
Other financing activities, net | (1,074) | (344) | (338)
Net cash used in financing activities | (256,905) | (51,257) | (159,484)
Increase (decrease) in cash and cash equivalents | 62,820 | 117,291 | (1,301)
Cash and cash equivalents at beginning of year | 127,462 | 10,171 | 11,472
Cash and cash equivalents at end of year | 190,282 | 127,462 | 10,171
Income taxes paid | 170,035 | 199,404 | 123,395
Interest paid | 4,525 | 5,442 | 6,417
Capitalized interest | $ 3,237 | $ 3,309 | $ 2,262

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