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v3.19.3

Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares | 3 Months Ended
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Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018
Issuance of common stock through performance stock awards |  |  | 286,350 |  |  | 150,259
Exercise of stock options | 28,152 | 85,379 | 186,521 | 125,694 | 132,898 | 54,480
Issuance of common stock through employee purchase plan | 26,726 | 31,455 | 44,161 | 28,877 | 28,864 | 39,514
Common stock shares issued for cash | 266,410 |  |  |  | 213,276 |
Purchase of treasury stock |  |  | 111,835 |  |  | 57,619
Common stock dividends/distributions | $ 0.96 | $ 0.96 | $ 0.96 | $ 0.91 | $ 0.91 | $ 0.91
Preferred stock dividend shares | $ 15.95 | $ 15.95 | $ 15.95 | $ 15.95 | $ 15.95 | $ 15.95
Issuance of common stock for purchase of assets |  |  |  | 163,137 |  |
Additional Paid-in Capital [Member] |  |  |  |  |  |
Issuance of common stock through performance stock awards |  |  | 286,350 |  |  | 150,259
Exercise of stock options | 28,152 | 85,379 | 186,521 | 125,694 | 132,898 | 54,480
Issuance of common stock through employee purchase plan | 26,726 | 31,455 | 44,161 | 28,877 | 28,864 | 39,514
Issuance of common stock for purchase of assets |  |  |  | 163,137 |  |
Treasury Stock [Member] |  |  |  |  |  |
Purchase of treasury stock |  |  | 111,835 |  |  | 57,619
Accumulated Deficit [Member] |  |  |  |  |  |
Common stock dividends/distributions | $ 0.96 | $ 0.96 | $ 0.96 | $ 0.91 | $ 0.91 | $ 0.91
Preferred stock dividend shares | $ 15.95 | $ 15.95 | $ 15.95 | $ 15.95 | $ 15.95 | $ 15.95

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