Property and Equipment - Property, Plant and Equipment Balances (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 180,943	$ 165,374
Accumulated depreciation and amortization	(115,988)	(106,301)
Total property and equipment, net	64,955	59,073
Equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	87,061	81,034
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	6,999	7,498
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	20,365	19,517
Software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	57,575	50,230
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 8,943	$ 7,095

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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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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