Property and Equipment, net (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Property and Equipment, net
Property and equipment, gross	$ 95,872		$ 96,695
Less: Accumulated depreciation	(76,992)		(77,540)
Total property and equipment, net	18,880		19,155
Property and equipment capitalized but not placed in service	1,200		1,300
Total depreciation and amortization expense	3,660	$ 4,312
Property and Equipment
Property and Equipment, net
Total depreciation and amortization expense	3,200	3,900
Computer equipment, software, and internally developed software
Property and Equipment, net
Property and equipment, gross	80,052		77,237
Furniture and fixtures
Property and Equipment, net
Property and equipment, gross	3,211		3,794
Leasehold improvements
Property and Equipment, net
Property and equipment, gross	12,609		$ 15,664
Internally developed software
Property and Equipment, net
Amortization	$ 2,800	$ 3,200

The amount of capitalized assets that have not yet been placed in service as of the balance sheet date.

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives.

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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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