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Business Combinations - Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands | Jun. 26, 2020 | Mar. 06, 2020 | Sep. 27, 2019 | Jun. 12, 2019
--- | --- | --- | --- | ---
Assets |  |  |  |
Goodwill | $ 5,616,849 |  | $ 5,432,544 |
Wood Group |  |  |  |
Assets |  |  |  |
Cash and cash equivalents |  | $ 24,300 |  |
Receivables |  | 75,900 |  |
Other current assets |  | 5,200 |  |
Property, equipment and improvements, net |  | 8,300 |  |
Goodwill |  | 205,800 |  |
Identifiable intangible assets |  | 80,000 |  |
Miscellaneous |  | 19,400 |  |
Total Assets |  | 418,900 |  |
Liabilities |  |  |  |
Accounts payable, accrued expenses and other current liabilities |  | 71,800 |  |
Long term liabilities |  | 29,200 |  |
Total Liabilities |  | 101,000 |  |
Net assets acquired |  | $ 317,900 |  |
KeyW |  |  |  |
Assets |  |  |  |
Cash and cash equivalents |  |  |  | $ 29,100
Receivables |  |  |  | 79,100
Inventories, net |  |  |  | 19,300
Prepaid expenses and other |  |  |  | 2,400
Property, equipment and improvements, net |  |  |  | 24,500
Deferred tax asset and other |  |  |  | 37,800
Goodwill |  |  |  | 615,600
Identifiable intangible assets |  |  |  | 179,000
Total Assets |  |  |  | 986,800
Liabilities |  |  |  |
Accounts payable, accrued expenses and other current liabilities |  |  |  | 8,300
Accrued expenses |  |  |  | 69,100
Short term debt |  |  |  | 298,400
Other current liabilities |  |  |  | 3,900
Other non-current liabilities |  |  |  | 2,900
Total Liabilities |  |  |  | 382,600
Net assets acquired |  |  |  | $ 604,200

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- Definition Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
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