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CONSOLIDATED STATEMENTS OF CAPITALIZATION (Parenthetical) - shares | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Common stock, shares authorized | 60,000,000 | 60,000,000
Common stock, shares outstanding | 36,501,914 | 38,286,626
GSWC |  |
Common stock, shares outstanding | 146 | 146
6.87% notes due 2023 | GSWC |  |
Interest rate per annum (as a percent) | 6.87% |
7.00% notes due 2023 | GSWC |  |
Interest rate per annum (as a percent) | 7.00% |
6.81% notes due 2028 |  |
Interest rate per annum (as a percent) | 6.81% | 6.81%
6.81% notes due 2028 | GSWC |  |
Interest rate per annum (as a percent) | 6.81% | 6.81%
6.59% notes due 2029 |  |
Interest rate per annum (as a percent) | 6.59% | 6.59%
6.59% notes due 2029 | GSWC |  |
Interest rate per annum (as a percent) | 6.59% | 6.59%
7.875% notes due 2030 |  |
Interest rate per annum (as a percent) | 7.875% | 7.875%
7.875% notes due 2030 | GSWC |  |
Interest rate per annum (as a percent) | 7.875% | 7.875%
7.23% notes due 2031 |  |
Interest rate per annum (as a percent) | 7.23% | 7.23%
7.23% notes due 2031 | GSWC |  |
Interest rate per annum (as a percent) | 7.23% | 7.23%
6.00% notes due 2041 |  |
Interest rate per annum (as a percent) | 6.00% | 6.00%
6.00% notes due 2041 | GSWC |  |
Interest rate per annum (as a percent) | 6.00% | 6.00%
3.45% private placement notes due 2029 |  |
Interest rate per annum (as a percent) | 3.45% | 3.45%
3.45% private placement notes due 2029 | GSWC |  |
Interest rate per annum (as a percent) | 3.45% | 3.45%
9.56% private placement notes due 2031 |  |
Interest rate per annum (as a percent) | 9.56% | 9.56%
9.56% private placement notes due 2031 | GSWC |  |
Interest rate per annum (as a percent) | 9.56% | 9.56%
5.87% private placement notes due 2028 |  |
Interest rate per annum (as a percent) | 5.87% | 5.87%
5.87% private placement notes due 2028 | GSWC |  |
Interest rate per annum (as a percent) | 5.87% | 5.87%
6.70% private placement notes due 2019 |  |
Interest rate per annum (as a percent) | 6.70% | 6.70%
6.70% private placement notes due 2019 | GSWC |  |
Interest rate per annum (as a percent) | 6.70% | 6.70%
5.50% tax-exempt obligation due 2026 |  |
Interest rate per annum (as a percent) | 5.50% | 5.50%
5.50% tax-exempt obligation due 2026 | GSWC |  |
Interest rate per annum (as a percent) | 5.50% | 5.50%

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