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Cash flow information (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Interest, net | $ 83,009,000 | $ 79,638,000 | $ 87,920,000
Income taxes paid, net | 16,041,000 | 112,137,000 | 105,908,000
AFUDC borrowed | 2,300,000 | 966,000 | 914,000
Property, plant and equipment additions in accounts payable | 42,355,000 | 29,263,000 | 22,712,000
Issuance of common stock in connection with acquisition | 18,186,000 | 0 | 0
Continuing and discontinued operations |  |  |
Income taxes paid, net | $ 5,500,000 | $ 9,700,000 | $ 1,300,000

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