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Summary of Significant Accounting Policies - Estimated Useful Lives of Intangible Assets Acquired (Detail)
 3 Months Ended
Mar. 31, 2020
Customer-Related Intangible Assets | Minimum  
Acquired Finite Lived Intangible Assets [Line Items]  
Intangible assets estimated useful lives 1 year
Customer-Related Intangible Assets | Maximum  
Acquired Finite Lived Intangible Assets [Line Items]  
Intangible assets estimated useful lives 11 years
Marketing-Related Intangible Assets | Minimum  
Acquired Finite Lived Intangible Assets [Line Items]  
Intangible assets estimated useful lives 2 years
Marketing-Related Intangible Assets | Maximum  
Acquired Finite Lived Intangible Assets [Line Items]  
Intangible assets estimated useful lives 8 years
Technology-related intangible assets | Minimum  
Acquired Finite Lived Intangible Assets [Line Items]  
Intangible assets estimated useful lives 2 years
Technology-related intangible assets | Maximum  
Acquired Finite Lived Intangible Assets [Line Items]  
Intangible assets estimated useful lives 8 years