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Contract Assets and Liabilities (Tables) | 3 Months Ended
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Mar. 31, 2019
Contract with Customer, Asset and Liability [Abstract] |
Schedule of Contract Assets and Contract Liabilities | As of March 31, 2019 and December 31, 2018 Contract assets and contract liabilities consisted of the following:
(in thousands) | March 31, 2019 | December 31, 2018
Contract assets | $57,869 | $57,447
Contract liabilities | 9,865 | 9,025

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