Property and Equipment - Balances (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Property and Equipment, Net
Property and equipment gross	$ 161,524	$ 112,533
Less: accumulated depreciation and amortization	(85,288)	(68,798)
Total	76,236	43,735
Computer equipment and software
Property and Equipment, Net
Property and equipment gross	92,493	79,161
Furniture, equipment and building improvements
Property and Equipment, Net
Property and equipment gross	16,487	14,132
Internal-use software development costs
Property and Equipment, Net
Property and equipment gross	$ 52,544	$ 19,240

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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