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Earnings Per Share and Capital Stock (Details 2) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Additional disclosure |  |  |
Common Shares issued under DRP and the 2000 and 2008 Employee Plans | 114,821 | 77,038 | 138,868
Value of Common Shares issued under DRP and the 2000 and 2008 Employee Plans |  |  | $ 1,658,000
Common Shares authorized for issuance but unissued under DRP | 1,055,948 |  |
Common Shares authorized for issuance but unissued under 401(k) Plan | 387,300 |  |
Common Shares issued as a result of the exercise of stock options | 131,448 | 819,400 | 177,426
Value of Common Shares issued as a result of the exercise of stock options | 2,111,000 | 13,295,000 | 2,350,000
Common Shares repurchased in the open market under DRP and 401(k) Plan | 598,573 | 1,351,934 | 882,820
Amount available for issuance of securities under registration statement | 115,000,000 |  |
GSWC |  |  |
Additional disclosure |  |  |
Value of Common Shares issued under DRP and the 2000 and 2008 Employee Plans | $ 0 | $ 895,000 | $ 10,000,000

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