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Cash flow information (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Interest, net | $ 15,978,000 | $ 19,067,000 |
Income taxes paid (refunded), net | (1,000) | 29,000 |
AFUDC borrowed | 627,000 | 556,000 |
Right-of-use assets obtained in exchange for new operating lease liabilities | 10,655,000 | 2,731,000 | $ 54,880,000
Property, plant and equipment additions in accounts payable | 27,425,000 | 27,655,000 | 46,119,000
Accrual for holdback payment related to a business combination | 5,000,000 | 0 | 0
Debt assumed in connection with a business combination | 0 | 1,163,000 | $ 1,163,000
Continuing and discontinued operations |  |  |
Income taxes paid (refunded), net | $ 146,000 | $ 132,000 |

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