v3.22.2.2
Statements of Cash Flow - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Operating Activities:    
Net income $ 563,843 $ 399,780
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 19,035 17,154
Deferred income taxes 10,339 (639)
Stock-based compensation attributable to equity awards 7,971 2,919
Other 110 5,085
Changes in operating assets and liabilities:    
Accounts receivable (70,543) (261,860)
Inventories (35,371) 1,595
Other assets (17,020) (1,014)
Trade accounts payable and accrued liabilities (9,796) 50,716
Current income taxes receivable / payable (2,255) 17,188
Net cash provided by operating activities 466,313 230,924
Investing Activities:    
Purchases of property, plant and equipment (105,509) (85,489)
Proceeds from sale of assets 0 405
Net cash used in investing activities (105,509) (85,084)
Financing Activities:    
Deferred financing fees 0 (550)
Purchase of treasury stock (225,248) (32,732)
Proceeds from issuance of common stock, net 206 414
Dividends paid (1,170) (1,235)
Net cash used in financing activities (226,212) (34,103)
Net increase (decrease) in cash and cash equivalents 134,592 111,737
Cash and cash equivalents at beginning of period 438,990 183,123
Cash and cash equivalents at end of period $ 573,582 $ 294,860