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Consolidated 50% Owned Subsidiaries Consolidated 50% Owned Subsidiaries - Balance Sheet Information (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Jan. 01, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Schedule of Equity Method Investments [Line Items] |  |  |
Cash and cash equivalents | $ 76,530 |  | $ 94,095
Accounts receivable, including retainage | 160,512 |  | 145,026
Other current assets | 11,065 |  | 8,074
Total current assets | 332,746 |  | 302,616
Property and equipment, net | 48,584 |  | 51,999
Operating lease right-of-use assets | 14,589 | $ 13,600 |
Goodwill | 85,231 |  | 85,231
Total assets | 521,969 |  | 482,573
Accounts payable | 110,624 |  | 99,426
Other current liabilities | 6,982 |  | 4,676
Total current liabilities | 213,659 |  | 179,174
Other long-term liabilities | 1,088 |  | 1,229
Total liabilities | 338,710 |  | 310,313
Variable Interest Entity, Primary Beneficiary |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Cash and cash equivalents | 11,202 |  | 8,745
Accounts receivable, including retainage | 24,314 |  | 24,109
Other current assets | 15,079 |  | 14,533
Total current assets | 50,595 |  | 47,387
Property and equipment, net | 6,008 |  | 7,219
Operating lease right-of-use assets | 3,020 |  |
Goodwill | 1,501 |  | 1,501
Total assets | 61,124 |  | 56,107
Accounts payable | 21,869 |  | 22,211
Other current liabilities | 15,459 |  | 9,811
Total current liabilities | 37,328 |  | 32,022
Other long-term liabilities | 1,123 |  | 1,976
Total liabilities | $ 38,451 |  | $ 33,998

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