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Property and Equipment - Schedule of property and equipment (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Property, Plant and Equipment [Line Items] |  |
Total property and equipment | $ 224,998 | $ 286,515
Less: accumulated depreciation | (144,982) | (171,825)
Total property and equipment, net | 80,016 | 114,690
Software |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | 106,250 | 126,796
Computer hardware and other equipment |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | 69,428 | 76,558
Leasehold Improvements |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | 32,584 | 54,293
Furniture, fixtures, and other |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | $ 16,736 | $ 28,868

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