Goodwill and Other Intangibles - Summary of Other Intangible Assets and Accumulated Amortization Balances (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
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