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v3.20.4

Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Operating Activities |  |  |
Net income | $ 386,100 | $ 154,800 | $ 213,600
Adjustments to reconcile net income to net cash provided by operating activities |  |  |
Depreciation and amortization | 161,000 | 152,200 | 134,000
Deferred and noncurrent income tax charges (benefits) | 2,500 | 23,700 | 37,900
Loss on early debt extinguishment | 0 | 14,800 | 0
Accretion of asset retirement obligations | 2,300 | 2,100 | 2,000
Pretax (gains) losses from sale of assets | (1,300) | (100) | 1,100
Net decrease (increase) in noncash operating working capital | (13,100) | (48,700) | 2,300
Other operating activities - net | 26,200 | 14,500 | 7,800
Net cash provided by operating activities | 563,700 | 313,300 | 398,700
Investing Activities |  |  |
Property additions | (230,700) | (204,800) | (204,300)
Proceeds from sale of assets | 8,100 | 2,500 | 1,200
Other investing activities - net | (1,700) | (800) | (6,000)
Net cash required by investing activities | (224,300) | (203,100) | (209,100)
Financing Activities |  |  |
Purchase of treasury stock | (399,600) | (165,800) | (144,400)
Dividends paid | (6,900) | 0 | 0
Repayments of debt | (38,900) | (573,400) | (21,300)
Borrowings of debt | 0 | 743,800 | 0
Early debt extinguishment costs | 0 | (10,400) | 0
Debt issuance costs | 0 | (4,100) | 0
Amounts related to share-based compensation | (10,700) | (4,500) | (9,400)
Net cash required by financing activities | (456,100) | (14,400) | (175,100)
Net change in cash, cash equivalents, and restricted cash | (116,700) | 95,800 | 14,500
Cash, cash equivalents, and restricted cash at January 1 | 280,300 | 184,500 | 170,000
Cash, cash equivalents, and restricted cash at December 31 | $ 163,600 | $ 280,300 | $ 184,500

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- Definition Amount of cash outflow for debt, mandatory redeemable security, and principal payment for finance lease obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
Name: | us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration