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

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- Definition

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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- Definition

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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- Definition

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 of divestiture of long-lived, 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, furniture and fixtures, and computer equipment.

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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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Property and Equipment, net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Property and Equipment, net
Property and equipment, gross	$ 91,206		$ 91,206		$ 86,535
Less: Accumulated depreciation	(71,750)		(71,750)		(65,114)
Total property and equipment, net	19,456		19,456		21,421
Property and equipment capitalized but not placed in service	1,100		1,100		900
Total depreciation and amortization expense	4,591	$ 5,175	8,903	$ 10,204
Property and Equipment
Property and Equipment, net
Total depreciation and amortization expense	4,200	4,600	8,100	9,000
Computer equipment, software, and internally developed software
Property and Equipment, net
Property and equipment, gross	71,771		71,771		66,198
Property and equipment disposals			900
Furniture and fixtures
Property and Equipment, net
Property and equipment, gross	3,803		3,803		4,610
Leasehold improvements
Property and Equipment, net
Property and equipment, gross	15,632		15,632		$ 15,727
Internally developed software
Property and Equipment, net
Amortization	$ 3,100	$ 3,300	$ 6,300	$ 6,400