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Construction Contract and Other Service Revenues (Details 2) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018 | Dec. 31, 2017
Change in Accounts Receivable |  |  |  |
Beginning balance | $ 25,261 |  | $ 26,277 |
Ending balance | 25,261 |  | 26,277 |
Construction Contract Revenue |  |  |  |
Change in Accounts Receivable |  |  |  |
Beginning balance | 6,569 | $ 4,021 | 6,701 | $ 4,577
Ending balance | 6,569 | 4,021 | 6,701 | 4,577
Change in Contract with Customer, Asset |  |  |  |
Beginning balance | 14,834 | 4,250 | 3,189 | 4,884
Ending balance | 14,834 | 4,250 | 3,189 | 4,884
Change in Contract with Customer, Liability |  |  |  |
Beginning balance | 1,005 | 8,279 | 568 | 27,402
Ending balance | 1,005 | 8,279 | $ 568 | $ 27,402
Revenue recognized included in beginning balance | $ 439 | $ 19,297 |  |

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