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Goodwill and Other Intangibles - Summary of Other Intangible Assets and Accumulated Amortization Balances (Detail) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
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Intangible Assets [Line Items] |  |
Gross Carrying Value | $ 147,701 | $ 155,264
Accumulated Amortization | (108,561) | (108,843)
Net Carrying Value | 39,140 | 46,421
Net Carrying Value | 39,140 | 46,421
Customer Relationships |  |
Intangible Assets [Line Items] |  |
Gross Carrying Value | 92,257 | 97,815
Accumulated Amortization | (63,990) | (63,432)
Net Carrying Value | 28,267 | 34,383
Technology |  |
Intangible Assets [Line Items] |  |
Gross Carrying Value | 29,993 | 30,615
Accumulated Amortization | (24,423) | (24,075)
Net Carrying Value | 5,570 | 6,540
Product Development Costs |  |
Intangible Assets [Line Items] |  |
Gross Carrying Value | 20,781 | 22,164
Accumulated Amortization | (20,148) | (21,336)
Net Carrying Value | 633 | 828
Tradenames |  |
Intangible Assets [Line Items] |  |
Net Carrying Value | $ 4,670 | $ 4,670

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