Goodwill and Other Intangible Assets (Intangible Assets) (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 243,589	$ 244,647
Accumulated Amortization	89,074	72,164
Net Carrying Amount	154,515	172,483
Indefinite-lived other intangible asset	4,432	4,525
Total other intangible assets	248,021	249,172
Other intangible assets, net of amortization	158,947	177,008
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	149,317	149,753
Accumulated Amortization	39,018	30,078
Net Carrying Amount	110,299	119,675
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	80,938	81,535
Accumulated Amortization	45,190	38,624
Net Carrying Amount	35,748	42,911
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,994	12,019
Accumulated Amortization	4,361	3,213
Net Carrying Amount	7,633	8,806
Covenants not to compete
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,340	1,340
Accumulated Amortization	505	249
Net Carrying Amount	$ 835	$ 1,091