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Statements Of Consolidated Stockholders' Equity (Shares) - shares
shares in Thousands
Total
Common Stock
Treasury Stock
Preferred Stock
Beginning Balance at Dec. 31, 2017 337,016 340,813 3,797 0
Treasury stock acquired (166) 0 (166) 0
Issued:        
Common stock - private placement 24,964 24,964 0 0
Preferred stock 0 0 0 420
Employee stock purchase plan 223 223 0 0
Long-term incentive plan 561 561 0 0
401(k) and profit sharing plan 882 882 0 0
ATM Program 8,883 8,883 0 0
Ending Balance at Dec. 31, 2018 372,363 376,326 3,963 420
Issued:        
Preferred stock [1] 0 0 0 20
Employee stock purchase plan 201 201 0 0
Long-term incentive plan 518 518 0 0
401(k) and profit sharing plan 631 631 0 0
ATM Program 8,423 8,423 0 0
Ending Balance at Dec. 31, 2019 382,136 386,099 3,963 440
Issued:        
Employee stock purchase plan 236 236 0 0
Long-term incentive plan 385 385 0 0
401(k) and profit sharing plan 544 544 0 0
ATM Program 8,459 8,459 0 0
Ending Balance at Dec. 31, 2020 391,760 395,723 3,963 440
[1] See Note 13, "Equity," for additional information.