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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
--- | --- | --- | --- | --- | --- | ---
Balances at Dec. 31, 2015 | $ 465,945 | $ 423,730 | $ 245,022 | $ 238,795 | $ 220,923 | $ 184,935
Balances (in shares) at Dec. 31, 2015 |  |  | 36,502,000 | 146 |  |
Balances (in shares) at Dec. 31, 2016 |  |  | 36,571,000 | 146 |  |
Add: |  |  |  |  |  |
Net Income | 59,743 | 46,969 |  |  | 59,743 | 46,969
Exercise of stock options and other issuance of Common Shares | $ 235 |  | $ 235 |  |  |
Issuance of Common Shares (in shares) | 56,900 |  | 69,000 |  |  |
Tax benefit from employee stock-based awards | $ 581 | 501 | $ 581 | $ 501 |  |
Compensation on stock-based awards | 1,201 | 1,020 | 1,201 | 1,020 |  |
Dividend equivalent rights on stock-based awards not paid in cash | 193 | 166 | 193 | 166 |  |
Deduct: |  |  |  |  |  |
Dividends on Common Shares | 33,408 | 25,450 |  |  | 33,408 | 25,450
Dividend equivalent rights on stock-based awards | 193 | 166 |  |  | 193 | 166
Balances at Dec. 31, 2016 | 494,297 | 446,770 | $ 247,232 | $ 240,482 | 247,065 | 206,288
Balances (in shares) at Dec. 31, 2017 |  |  | 36,681,000 | 146 |  |
Add: |  |  |  |  |  |
Net Income | 69,367 | 53,757 |  |  | 69,367 | 53,757
Exercise of stock options and other issuance of Common Shares | $ 909 |  | $ 909 |  |  |
Issuance of Common Shares (in shares) | 56,498 |  | 110,000 |  |  |
Compensation on stock-based awards | $ 1,789 | 1,527 | $ 1,789 | $ 1,527 |  |
Dividend equivalent rights on stock-based awards not paid in cash | 194 | 172 | 194 | 172 |  |
Deduct: |  |  |  |  |  |
Dividends on Common Shares | 36,417 | 27,680 |  |  | 36,417 | 27,680
Dividend equivalent rights on stock-based awards | 194 | 172 |  |  | 194 | 172
Balances at Dec. 31, 2017 | 529,945 | 474,374 | $ 250,124 | $ 242,181 | 279,821 | 232,193
Balances (in shares) at Dec. 31, 2018 |  |  | 36,758,000 | 165 |  |
Add: |  |  |  |  |  |
Net Income | 63,871 | 48,012 |  |  |  | 48,012
Exercise of stock options and other issuance of Common Shares | $ 546 |  | $ 546 |  |  |
Issuance of Common Shares (in shares) | 44,906 |  | 77,000 | 19 |  |
Compensation on stock-based awards | $ 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

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