XML 84 R58.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Goodwill and Other Intangible Assets, Net - Components of Goodwill and Other Intangible Assets, Net (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]      
Goodwill $ 588,213 $ 564,300 $ 528,424
Intangible assets:      
Total intangible assets 198,780 191,011  
Total goodwill and other intangibles assets 786,993 755,311  
Accumulated amortization:      
Total accumulated amortization (132,322) (118,302)  
Goodwill and other intangible assets, net 654,671 637,009  
Client Lists [Member]      
Intangible assets:      
Total intangible assets 188,898 181,564  
Accumulated amortization:      
Total accumulated amortization (125,887) (112,905)  
Other Intangible Assets [Member]      
Intangible assets:      
Total intangible assets 9,882 9,447  
Accumulated amortization:      
Total accumulated amortization $ (6,435) $ (5,397)