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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 shares | Sep. 30, 2019 shares | Sep. 30, 2020 shares | Sep. 30, 2019 shares
PREFERRED STOCK: |  |  |  |
Stock issued, exchanged (in shares) | 0 | 40,000 | 0 | 40,000
ADDITIONAL PAID-IN CAPITAL: | Exchange of preferred stock for shares of common stock |  |  |  |
Stock issued, exchanged (in shares) | 0 | 51,839 | 0 | 51,839
ADDITIONAL PAID-IN CAPITAL: | Exchange of senior notes for shares of common stock |  |  |  |
Stock issued, exchanged (in shares) | 0 | 1,177,817 | 0 | 1,177,817
ADDITIONAL PAID-IN CAPITAL: | Exchange of convertible senior notes for common stock |  |  |  |
Stock issued, exchanged (in shares) | 0 | 366,945 | 0 | 366,945
TREASURY STOCK – COMMON: |  |  |  |
Purchase of shares for company benefit plans (in shares) | 0 | 267 | 17,901 | 13,369
Release of shares from company benefit plans (in shares) | 0 | 187 | 44,126 | 1,484
COMMON STOCK: | Exchange of preferred stock for shares of common stock |  |  |  |
Stock issued, exchanged (in shares) | 0 | 52,000 | 0 | 52,000
COMMON STOCK: | Exchange of senior notes for shares of common stock |  |  |  |
Stock issued, exchanged (in shares) | 0 | 1,178,000 | 0 | 1,178,000
COMMON STOCK: | Exchange of convertible senior notes for common stock |  |  |  |
Stock issued, exchanged (in shares) | 0 | 367,000 | 0 | 367,000

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