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CONSOLIDATED STATEMENTS OF CHANGES IN COMMON SHAREHOLDERS' EQUITY - USD ($) $ in Thousands | Total | GSWC | Common Stock [Member] | Common Stock [Member] GSWC | Earnings Reinvested in the Business | Earnings Reinvested in the Business GSWC
--- | --- | --- | --- | --- | --- | ---
Common stock, shares outstanding |  |  | 36,681,000 | 146 |  |
Balances at Dec. 31, 2017 | $ 529,945 | $ 474,374 | $ 250,124 | $ 242,181 | $ 279,821 | $ 232,193
Add: |  |  |  |  |  |
Net Income | 63,871 | 48,012 |  |  | 63,871 | 48,012
Exercise of stock options and other issuance of Common Shares |  |  | 77,000 | 19 |  |
Exercise of stock options and other issuance of Common Shares | 546 | 47,500 | $ 546 | $ 47,500 |  |
Stock-based compensation, net of taxes paid from shares withheld from employees related to net share settlements | 2,798 | 2,539 | 2,798 | 2,539 |  |
Dividend equivalent rights on stock-based awards not paid in cash | 221 | 192 | 221 | 192 |  |
Deduct: |  |  |  |  |  |
Dividends on Common Shares | 38,937 | 68,850 |  |  | 38,937 | 68,850
Dividend equivalent rights on stock-based awards | 221 | 192 |  |  | 221 | 192
Balances at Dec. 31, 2018 | 558,223 | 503,575 | $ 253,689 | $ 292,412 | 304,534 | 211,163
Common stock, shares outstanding |  |  | 36,758,000 | 165 |  |
Add: |  |  |  |  |  |
Net Income | 84,342 | 66,663 |  |  | 84,342 | 66,663
Exercise of stock options and other issuance of Common Shares |  |  | 89,000 | 0 |  |
Exercise of stock options and other issuance of Common Shares | 519 |  | $ 519 |  |  |
Stock-based compensation, net of taxes paid from shares withheld from employees related to net share settlements | 1,148 | 1,150 | 1,148 | $ 1,150 |  |
Dividend equivalent rights on stock-based awards not paid in cash | 210 | 192 | 210 | 192 |  |
Deduct: |  |  |  |  |  |
Dividends on Common Shares | 42,702 | 20,200 |  |  | 42,702 | 20,200
Dividend equivalent rights on stock-based awards | 210 | 192 |  |  | 210 | 192
Balances at Dec. 31, 2019 | $ 601,530 | $ 551,188 | $ 255,566 | $ 293,754 | 345,964 | 257,434
Common stock, shares outstanding | 36,846,614 | 165 | 36,847,000 | 165 |  |
Add: |  |  |  |  |  |
Net Income | $ 86,425 | $ 64,971 |  |  | 86,425 | 64,971
Exercise of stock options and other issuance of Common Shares |  |  | 42,000 | 5 |  |
Exercise of stock options and other issuance of Common Shares | 30 | 60,000 | $ 30 | $ 60,000 |  |
Stock-based compensation, net of taxes paid from shares withheld from employees related to net share settlements | 894 | 983 | 894 | 983 |  |
Dividend equivalent rights on stock-based awards not paid in cash | 176 | 169 | 176 | 169 |  |
Deduct: |  |  |  |  |  |
Dividends on Common Shares | 47,206 | 22,500 |  |  | 47,206 | 22,500
Dividends |  | 71,344 |  |  |  | 71,344
Dividend equivalent rights on stock-based awards | 176 | 169 |  |  | 176 | 169
Balances at Dec. 31, 2020 | $ 641,673 | $ 583,298 | $ 256,666 | $ 354,906 | $ 385,007 | $ 228,392
Common stock, shares outstanding | 36,889,103 | 170 | 36,889,000 | 170 |  |

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