PROPERTY AND EQUIPMENT, NET - Summary of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment
Property and equipment, gross	$ 305,914	$ 284,444
Accumulated depreciation and amortization	(137,910)	(112,583)
Property and equipment, net	168,004	171,861
Land
Property, Plant and Equipment
Property and equipment, gross	18,653	18,653
Building and leasehold improvements
Property, Plant and Equipment
Property and equipment, gross	$ 147,729	137,448
Building and leasehold improvements \| Minimum
Property, Plant and Equipment
Useful Lives (years)	5 years
Building and leasehold improvements \| Maximum
Property, Plant and Equipment
Useful Lives (years)	39 years
Computer equipment and purchased software
Property, Plant and Equipment
Property and equipment, gross	$ 108,571	99,435
Computer equipment and purchased software \| Minimum
Property, Plant and Equipment
Useful Lives (years)	3 years
Computer equipment and purchased software \| Maximum
Property, Plant and Equipment
Useful Lives (years)	5 years
Furniture and fixtures
Property, Plant and Equipment
Property and equipment, gross	$ 30,666	28,506
Useful Lives (years)	5 years
Transportation equipment
Property, Plant and Equipment
Property and equipment, gross	$ 295	$ 402
Useful Lives (years)	5 years

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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