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Discontinued Operations - Assets and Liabilities Held for Sale (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Contract assets | $ 1,012,109 | $ 859,675
Other accrued liabilities | 536,909 | 402,483
Discontinued Operations |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Accounts receivable, net | 235,697 | 298,377
Contract assets | 159,579 | 110,340
Other current assets | 66,263 | 119,002
Current assets held for sale | 461,539 | 527,719
PP&E, net | 98,703 | 164,638
Goodwill | 118,710 | 141,889
Investments | 3,522 | 4,649
Other assets | 136,141 | 149,231
Noncurrent assets held for sale | 357,076 | 460,407
Total assets held for sale | 818,615 | 988,126
Accounts payable | 104,603 | 133,981
Short-term borrowings | 17,953 | 20,525
Contract liabilities | 40,204 | 47,779
Accrued salaries, wages and benefits | 61,672 | 64,778
Other accrued liabilities | 222,748 | 125,942
Current liabilities held for sale | 447,180 | 393,005
Noncurrent liabilities held for sale | 89,729 | 108,418
Total liabilities held for sale | 536,909 | 501,423
Discontinued Operations | Stork |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Accounts receivable, net | 196,104 | 245,105
Contract assets | 159,579 | 108,152
Other current assets | 44,638 | 45,384
Current assets held for sale | 400,321 | 398,641
PP&E, net | 94,686 | 97,258
Goodwill | 118,710 | 141,889
Investments | 3,522 | 4,649
Other assets | 120,826 | 135,421
Noncurrent assets held for sale | 337,744 | 379,217
Total assets held for sale | 738,065 | 777,858
Accounts payable | 97,651 | 116,580
Short-term borrowings | 17,953 | 20,525
Contract liabilities | 40,194 | 46,997
Accrued salaries, wages and benefits | 60,573 | 57,626
Other accrued liabilities | 175,220 | 113,965
Current liabilities held for sale | 391,591 | 355,693
Noncurrent liabilities held for sale | 82,961 | 98,940
Total liabilities held for sale | 474,552 | 454,633
Discontinued Operations | AMECO |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Accounts receivable, net | 29,117 | 42,797
Contract assets | 0 | 2,188
Other current assets | 21,625 | 73,618
Current assets held for sale | 50,742 | 118,603
PP&E, net | 4,017 | 67,380
Goodwill | 0 | 0
Investments | 0 | 0
Other assets | 15,315 | 13,810
Noncurrent assets held for sale | 19,332 | 81,190
Total assets held for sale | 70,074 | 199,793
Accounts payable | 6,684 | 17,388
Short-term borrowings | 0 | 0
Contract liabilities | 10 | 782
Accrued salaries, wages and benefits | 1,099 | 7,152
Other accrued liabilities | 47,528 | 11,977
Current liabilities held for sale | 55,321 | 37,299
Noncurrent liabilities held for sale | 6,768 | 9,478
Total liabilities held for sale | 62,089 | 46,777
Discontinued Operations | Other |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Accounts receivable, net | 10,476 | 10,475
Contract assets | 0 | 0
Other current assets | 0 | 0
Current assets held for sale | 10,476 | 10,475
PP&E, 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 | 10,476 | 10,475
Accounts payable | 268 | 13
Short-term borrowings | 0 | 0
Contract liabilities | 0 | 0
Accrued salaries, wages and benefits | 0 | 0
Other accrued liabilities | 0 | 0
Current liabilities held for sale | 268 | 13
Noncurrent liabilities held for sale | 0 | 0
Total liabilities held for sale | 268 | 13
Continuing Operations |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Accounts receivable, net | 0 | 0
Contract assets | 0 | 0
Other current assets | 0 | 0
Current assets held for sale | 0 | 0
PP&E, net | 24,326 | 24,538
Goodwill | 0 | 0
Investments | 5,712 | 5,064
Other assets | 0 | 0
Noncurrent assets held for sale | 30,038 | 29,602
Total assets held for sale | 30,038 | 29,602
Accounts payable | 0 | 0
Short-term borrowings | 0 | 0
Contract liabilities | 0 | 0
Accrued salaries, wages and benefits | 0 | 0
Other accrued liabilities | 0 | 0
Current liabilities held for sale | 0 | 0
Noncurrent liabilities held for sale | 0 | 0
Total liabilities held for sale | 0 | 0
Total |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Accounts receivable, net | 235,697 | 298,377
Contract assets | 159,579 | 110,340
Other current assets | 66,263 | 119,002
Current assets held for sale | 461,539 | 527,719
PP&E, net | 123,029 | 189,176
Goodwill | 118,710 | 141,889
Investments | 9,234 | 9,713
Other assets | 136,141 | 149,231
Noncurrent assets held for sale | 387,114 | 490,009
Total assets held for sale | 848,653 | 1,017,728
Accounts payable | 104,603 | 133,981
Short-term borrowings | 17,953 | 20,525
Contract liabilities | 40,204 | 47,779
Accrued salaries, wages and benefits | 61,672 | 64,778
Other accrued liabilities | 222,748 | 125,942
Current liabilities held for sale | 447,180 | 393,005
Noncurrent liabilities held for sale | 89,729 | 108,418
Total liabilities held for sale | $ 536,909 | $ 501,423

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