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Goodwill and Other Intangibles - Summary of Other Intangible Assets and Accumulated Amortization Balances (Detail) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
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Intangible Assets [Line Items] |  |
Gross Carrying Value | $ 148,466 | $ 138,895
Accumulated Amortization | (101,037) | (89,112)
Net Carrying Value | 47,429 | 49,783
Net Carrying Value | 47,429 | 49,783
Customer Relationships |  |
Intangible Assets [Line Items] |  |
Gross Carrying Value | 93,431 | 89,208
Accumulated Amortization | (58,565) | (50,687)
Net Carrying Value | 34,866 | 38,521
Technology |  |
Intangible Assets [Line Items] |  |
Gross Carrying Value | 29,409 | 25,106
Accumulated Amortization | (22,445) | (19,866)
Net Carrying Value | 6,964 | 5,240
Product Development Costs |  |
Intangible Assets [Line Items] |  |
Gross Carrying Value | 20,956 | 19,911
Accumulated Amortization | (20,027) | (18,559)
Net Carrying Value | 929 | 1,352
Tradenames |  |
Intangible Assets [Line Items] |  |
Net Carrying Value | $ 4,670 | $ 4,670

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