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Property and Equipment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Property, Plant and Equipment [Line Items] |  |  |
Total cost of property and equipment | $ 123,042 | $ 121,685 |
Leasehold improvements | 4,903 | 4,904 |
Less: accumulated depreciation and amortization | (76,029) | (70,311) |
Property and equipment, net | 47,013 | 51,374 |
Depreciation and amortization expense | 15,700 | 17,300 | $ 12,100
Capitalized development costs | 9,900 | 8,100 |
Impaired capitalized development costs | 900 | 1,100 | 3,700
Building and building improvements |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Total cost of property and equipment | 29,856 | 29,850 |
Land |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Total cost of property and equipment | 6,456 | 6,437 |
Internal-use software |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Total cost of property and equipment | 60,946 | 56,756 |
Less: accumulated depreciation and amortization | (42,500) | (38,700) | (29,900)
Amortization expense | 11,600 | 12,300 | $ 7,300
Purchased software |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Total cost of property and equipment | 2,609 | 3,370 |
Furniture and office equipment |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Total cost of property and equipment | 3,332 | 3,868 |
Computer hardware |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Total cost of property and equipment | 13,762 | 12,195 |
Software development in-progress |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Total cost of property and equipment | $ 1,178 | $ 4,305 |

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