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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Cash flows from operating activities:      
Net earnings (loss) $ (246,771) $ (271,592) $ 143,019
Adjustments to reconcile net earnings (loss) to net cash provided by operations:      
Depreciation and amortization 213,718 219,921 219,632
Provision (credit) for doubtful accounts (138) 3,716 (873)
Provision (benefit) for deferred income taxes (44,419) 25,163 46,839
Gain on disposition of assets (5,761) (118) (8,152)
Impairments and other charges 340,713 561,274 35,525
Amortization of unearned share-based compensation 15,713 14,722 13,612
Amortization of major maintenance costs 33,213 30,214 23,962
Other (640) (90) 1,683
Increase (decrease) in cash flows resulting from changes in:      
Accounts receivable 29,126 (124,941) 43,078
Inventory (19,248) 47,076 122,773
Other assets (38,335) (29,994) (25,470)
Income taxes payable 480 8,826 (2,503)
Accounts payable 15,951 (39,795) (57,405)
Accrued and other liabilities 27,974 558 (43,907)
Net cash provided by operating activities 321,576 444,940 511,813
Cash flows from investing activities:      
Capital expenditures (98,015) (148,185) (248,164)
Acquisitions of businesses and marine equipment, net of cash acquired 9,115 354,972 262,491
Proceeds from disposition of assets and other 51,342 17,310 57,657
Net cash used in investing activities (55,788) (485,847) (452,998)
Cash flows from financing activities:      
Borrowings (payments) on bank credit facilities, net (248,105) 250,024 (417,376)
Borrowings on long-term debt 0 0 500,000
Payments on long-term debt (60,000) (150,000) (125,000)
Payment of debt issue costs 0 0 (2,397)
Return of investment to noncontrolling interests and other (981) (676) (817)
Proceeds from exercise of stock options 629 353 5,743
Payments related to tax withholding for share-based compensation (2,856) (3,193) (2,031)
Net cash provided by (used in) financing activities (311,313) 96,508 (41,878)
Increase (decrease) in cash and cash equivalents (45,525) 55,601 16,937
Cash and cash equivalents, beginning of year 80,338 24,737 7,800
Cash and cash equivalents, end of year 34,813 80,338 24,737
Cash paid (received) during the period:      
Interest paid 40,878 48,721 55,766
Income taxes paid (refunded), net (116,648) (35,571) 2,926
Operating cash outflow from operating leases 44,089 43,639 39,376
Non-cash investing activity:      
Capital expenditures included in accounts payable 18,633 (13,280) 13,875
Right-of-use assets obtained in exchange for lease obligations $ 33,842 $ 46,511 $ 21,195