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Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Taxes and Interest Paid: |  |  |
Income taxes paid | $ 13,615 | $ 10,916 | $ 14,817
Interest paid | 22,762 | 22,305 | 21,822
Non-Cash Transactions: |  |  |
Accrued payables for investment in utility plant | 20,131 | 17,236 | 20,655
Property installed by developers and conveyed | 2,082 | 5,395 | 3,284
GSWC |  |  |
Taxes and Interest Paid: |  |  |
Income taxes paid | 4,822 | 8,437 | 1,541
Interest paid | 22,282 | 22,078 | 21,797
Non-Cash Transactions: |  |  |
Accrued payables for investment in utility plant | 20,128 | 17,207 | 20,655
Property installed by developers and conveyed | $ 2,082 | $ 5,395 | $ 3,284

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