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Fixed Assets
12 Months Ended
Dec. 31, 2021
Fixed Assets [Abstract]  
Property, Plant and Equipment Disclosure [Text Block] Fixed Assets
As of December 31, 2021 and 2020, fixed assets consisted of the following:
 As of December 31,
 20212020
 (dollars in thousands)
Telecommunication and computer equipment$9,379 $7,921 
Computer software13,715 11,813 
Furniture and fixtures3,607 3,387 
Leasehold improvements42,749 40,468 
Finance lease right-of-use asset (See Note 16)6,468 6,172 
Airplane and related equipment — 3,932 
Other75 — 
75,993 73,693 
Less: Accumulated depreciation and amortization(50,017)(40,670)
$25,976 $33,023 
Depreciation and amortization expense related to fixed assets was $11.0 million, $9.6 million and $7.3 million for the years ended December 31, 2021, 2020, and 2019, respectively, and are included in depreciation and amortization expense in the accompanying consolidated statements of operations.
During the fourth quarter of 2020 the Company purchased an aircraft and related equipment of $4.5 million. This aircraft was subsequently sold during the fourth quarter of 2021 for a gain of $0.3 million, within the accompanying consolidated statement of operations.
Assets acquired under finance leases were $6.5 million and $6.2 million as of December 31, 2021 and 2020, respectively. If the assets acquired under finance leases transfer title at the end of the lease term or contain a bargain purchase option, the assets are amortized over their estimated useful lives; otherwise, the assets are amortized over the respective lease term. The depreciation of assets capitalized under finance leases is included in depreciation and amortization expenses and was $1.3 million, $1.2 million, and $1.3 million for the years ended December 31, 2021, 2020, and 2019, respectively. As of December 31, 2021 and 2020, accumulated depreciation related to assets acquired under finance leases was $4.7 million and $3.4 million, respectively.