v3.22.0.1
Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Operating Activities      
Net income $ 541,422 $ 76,067 $ 58,129
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization 23,288 19,459 17,707
Deferred income taxes 2,264 6,429 3,376
Stock-based compensation attributable to equity awards 3,786 1,878 1,619
Other 5,831 470 754
Changes in operating assets and liabilities:      
Accounts receivable (216,808) (53,383) 12,255
Inventories (8,494) (2,638) 12,683
Other assets (62) (746) (229)
Trade accounts payable and accrued liabilities 66,886 7,580 2,040
Current income taxes receivable / payable 305 2,346 (2,213)
Net cash provided by operating activities 418,418 57,462 106,121
Investing Activities      
Purchases of property, plant and equipment (118,252) (86,082) (52,484)
Proceeds from sale of assets 97 91 28
Net cash used in investing activities (118,155) (85,991) (52,456)
Financing Activities      
Deferred financing fees (550) 0 0
Purchase of treasury stock (43,296) (20,662) 0
Proceeds from issuance of common stock, net 1,083 2,999 568
Dividends paid (1,633) (1,650) (1,673)
Net cash used in financing activities (44,396) (19,313) (1,105)
Net increase (decrease) in cash and cash equivalents 255,867 (47,842) 52,560
Cash and cash equivalents at beginning of period 183,123 230,965 178,405
Cash and cash equivalents at end of period $ 438,990 $ 183,123 $ 230,965