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Lease Abandonment and Other Restructuring Costs (Details) ft² in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 USD ($) ft² | Jun. 30, 2023 USD ($) | Jun. 30, 2024 USD ($) ft² | Jun. 30, 2023 USD ($) | [1]
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Lease abandonment charge | $ 12,857 | $ 0 | $ 12,857 | [1] | $ 0
Contract Termination | Vienna, VA |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Net rentable area (in square foot) | ft² | 4 |  | 4 |  |
Lease Abandonment | Contract Termination | Alexandria, VA |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Net rentable area (in square foot) | ft² | 95 |  | 95 |  |
Lease abandonment charge | $ 12,900 |  |  |  |
Reduction in operating lease right-of-use assets | 6,700 |  |  |  |
Exit and disposal costs | 3,700 |  |  |  |
Lease abandonment liability | 13,900 |  | $ 13,900 |  |
Lease Abandonment | Contract Termination | Alexandria, VA | Leasehold Improvements |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Tangible asset impairment charges | 2,500 |  |  |  |
Cancellation of contracts and leasing agreements | Other Restructuring |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring charges | 3,800 |  | 3,800 |  |
Restructuring reserve | $ 1,100 |  | $ 1,100 |  |
[1] | (a) The cash flows related to discontinued operations and held-for-sale assets and liabilities have not been segregated, and remain included in the major classes of assets and liabilities. Accordingly, the Consolidated Statements of Cash Flows include the results of continuing and discontinued operations.

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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
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- Definition Amount of gain (loss) on termination of lease before expiration of lease term. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 40 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479092/842-20-40-1 + Details
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