Supplemental Cash Flow Information - Net Effect of Changes in Operating Assets and Liabilities, Net of Non-Cash Transactions, on Cash Flows from Operating Activities of Continuing Operations (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
Supplemental Cash Flow Elements [Abstract] | |||
Accounts and notes receivable | $ (475,919) | $ (425,313) | $ 144,877 |
Contract assets | (92,838) | 15,999 | (152,702) |
Inventories | (28,131) | 14,110 | (9,905) |
Prepaid expenses and other current assets | (40,187) | (32,079) | 25,133 |
Accounts payable and accrued expenses and other non-current liabilities | 247,897 | 28,547 | 81,246 |
Contract liabilities | (23) | 139,114 | (124,680) |
Other, net | (11,332) | 17,858 | (12,635) |
Net change in operating assets and liabilities, net of non-cash transactions | $ (400,533) | $ (241,764) | $ (48,666) |