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Discontinued Operations - Assets and Liabilities Held for Sale (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Contract assets | $ 1,310,686 | $ 1,238,173
Other accrued liabilities | 425,897 | 470,351
Discontinued Operations |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Accounts and notes receivable, net | 65,230 | 85,051
Contract assets | 3,930 | 3,497
Other current assets | 46,014 | 54,116
Current assets held for sale | 115,174 | 142,664
Property, plant and equipment, net | 132,315 | 232,792
Goodwill | 37 | 12,338
Investments | 0 | 0
Other assets | 5,135 | 5,868
Noncurrent assets held for sale | 137,487 | 250,998
Total assets held for sale | 252,661 | 393,662
Accounts payable | 14,446 | 24,692
Contract liabilities | 2,462 | 4,466
Accrued salaries, wages and benefits | 8,177 | 8,913
Other accrued liabilities | 8,065 | 9,451
Current liabilities held for sale | 33,150 | 47,522
Noncurrent liabilities held for sale | 3,638 | 4,272
Total liabilities held for sale | 36,788 | 51,794
Discontinued Operations | AMECO |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Accounts and notes receivable, net | 49,305 | 69,126
Contract assets | 3,930 | 3,497
Other current assets | 46,014 | 54,116
Current assets held for sale | 99,249 | 126,739
Property, plant and equipment, net | 132,315 | 232,792
Goodwill | 37 | 12,338
Investments | 0 | 0
Other assets | 5,135 | 5,868
Noncurrent assets held for sale | 137,487 | 250,998
Total assets held for sale | 236,736 | 377,737
Accounts payable | 14,438 | 24,692
Contract liabilities | 2,462 | 4,466
Accrued salaries, wages and benefits | 8,177 | 8,913
Other accrued liabilities | 7,604 | 9,451
Current liabilities held for sale | 32,681 | 47,522
Noncurrent liabilities held for sale | 3,638 | 4,272
Total liabilities held for sale | 36,319 | 51,794
Discontinued Operations | Other |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Accounts and notes receivable, net | 15,925 | 15,925
Contract assets | 0 | 0
Other current assets | 0 | 0
Current assets held for sale | 15,925 | 15,925
Property, plant and equipment, net | 0 | 0
Goodwill | 0 | 0
Investments | 0 | 0
Other assets | 0 | 0
Noncurrent assets held for sale | 0 | 0
Total assets held for sale | 15,925 | 15,925
Accounts payable | 8 | 0
Contract liabilities | 0 | 0
Accrued salaries, wages and benefits | 0 | 0
Other accrued liabilities | 461 | 0
Current liabilities held for sale | 469 | 0
Noncurrent liabilities held for sale | 0 | 0
Total liabilities held for sale | 469 | 0
Continuing Operations |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Accounts and notes receivable, net | 14,927 | 17,513
Contract assets | 4,603 | 3,779
Other current assets | 7,029 | 8,112
Current assets held for sale | 26,559 | 29,404
Property, plant and equipment, net | 59,683 | 106,762
Goodwill | 7,311 | 9,295
Investments | 6,118 | 7,293
Other assets | 14,307 | 12,654
Noncurrent assets held for sale | 87,419 | 136,004
Total assets held for sale | 113,978 | 165,408
Accounts payable | 7,384 | 6,702
Contract liabilities | 55 | 25
Accrued salaries, wages and benefits | 118 | 919
Other accrued liabilities | 10,288 | 11,562
Current liabilities held for sale | 17,845 | 19,208
Noncurrent liabilities held for sale | 10,706 | 11,320
Total liabilities held for sale | 28,551 | 30,528
Total |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Accounts and notes receivable, net | 80,157 | 102,564
Contract assets | 8,533 | 7,276
Other current assets | 53,043 | 62,228
Current assets held for sale | 141,733 | 172,068
Property, plant and equipment, net | 191,998 | 339,554
Goodwill | 7,348 | 21,633
Investments | 6,118 | 7,293
Other assets | 19,442 | 18,522
Noncurrent assets held for sale | 224,906 | 387,002
Total assets held for sale | 366,639 | 559,070
Accounts payable | 21,830 | 31,394
Contract liabilities | 2,517 | 4,491
Accrued salaries, wages and benefits | 8,295 | 9,832
Other accrued liabilities | 18,353 | 21,013
Current liabilities held for sale | 50,995 | 66,730
Noncurrent liabilities held for sale | 14,344 | 15,592
Total liabilities held for sale | $ 65,339 | $ 82,322

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