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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Cash flows from operating activities:    
Net income $ 226,989 $ 198,153
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 246,045 202,284
Non-cash interest expense 6,730 3,330
Equity-based compensation 14,834 10,514
Write-off of debt issuance costs 2,131 0
Change in deferred income taxes (1,680) (47,826)
(Gain) loss on asset sales and disposals, net 4,314 (3,122)
Equity method investment (income) loss, net 531 0
Fair value adjustment 41,390 0
Gain on step acquisition (33,406) 0
Changes in operating assets and liabilities:    
Accounts receivable, net 764 (11,269)
Income taxes receivable 21,019 (40,878)
Prepaid and other current assets (7,149) (5,561)
Accounts payable and accrued liabilities 4,216 1,882
Deferred revenue 2,919 1,427
Other (2,721) (5,606)
Net cash provided by operating activities 530,286 398,980
Cash flows from investing activities:    
Purchase of business, net of cash acquired (1,953,643) (38,296)
Purchase of equity investment 0 (37,245)
Capital expenditures (282,024) (217,994)
Change in accrued expenses related to capital expenditures 12,666 (5,638)
Proceeds from sales of property, plant and equipment 282 617
Issuance of note and other receivables 0 (7,288)
Settlement of note and other receivables 0 6,000
Net cash used in investing activities (2,222,719) (299,844)
Cash flows from financing activities:    
Proceeds from equity issuance 0 488,750
Proceeds from long-term debt borrowings 1,695,850 100,000
Payment of equity issuance costs 0 (18,951)
Payment of debt issuance costs (13,741) 0
Payments on long-term debt (21,683) (121,515)
Payment of withholding tax for equity awards (8,035) (5,861)
Dividends paid to stockholders (46,815) (41,498)
Deposits received for asset construction 1,485 0
Net cash provided by financing activities 1,607,061 400,925
Increase (decrease) in cash and cash equivalents (85,372) 500,061
Cash and cash equivalents, beginning of period 574,909 125,271
Cash and cash equivalents, end of period 489,537 625,332
Supplemental cash flow disclosures:    
Cash paid for interest, net of capitalized interest 69,450 49,017
Cash paid for income taxes, net of refunds received $ (1,068) $ 28,245