v3.10.0.1
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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