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Transaction and Other Costs Transaction and Other Costs | 12 Months Ended
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Dec. 31, 2019
Other Income and Expenses [Abstract] |
Schedule of Other Operating Cost and Expense, by Component [Table Text Block] | Transaction and Other Costs The following is a summary of transaction and other costs:
| Year Ended December 31,
| 2019 |  | 2018 |  | 2017
| (In thousands)
Relocation of corporate headquarters (1) | $ | 10,900 |  |  | $ | — |  |  | $ | — |
Demolition costs (2) | 5,432 |  |  | — |  |  | — |
Formation transaction and integration costs (3) | 5,252 |  |  | 15,907 |  |  | 127,739 |
Completed, potential and pursued transaction expenses | 651 |  |  | 9,008 |  |  | — |
Other (4) | 1,000 |  |  | 2,791 |  |  | — |
Transaction and other costs | $ | 23,235 |  |  | $ | 27,706 |  |  | $ | 127,739 |
__________________________
(1) | In November 2019, we relocated our corporate headquarters. Upon the relocation of our corporate headquarters, we incurred an impairment charge on the right-of-use assets for leases related to our former corporate headquarters as well as other costs. See Note 17 for more information.
(2) | Related to 1900 Crystal Drive.
(3) | For the year ended December 31, 2019 includes integration and severance costs. For the year ended December 31, 2018 includes transition services provided by our former parent, and integration and severance costs. For the year ended December 31, 2017 includes severance and transaction bonus expense of $40.8 million, investment banking fees of $33.6 million, legal fees of $13.9 million and accounting fees of $10.8 million.
(4) For the year ended December 31, 2019 represents a contribution to the Washington Housing Conservancy. For the year ended December 31, 2018 represents costs related to the successful pursuit of Amazon's additional headquarters at our properties in National Landing.

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- Definition Tabular disclosure of each detailed component of other operating costs and expenses that are applicable to sales and revenues, but not included in the cost of sales in the income statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 + Details
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