Quarterly report pursuant to Section 13 or 15(d)

Acquisitions - Summary of Amounts Allocated to Acquired Assets and Assumed Liabilities (Parenthetical) (Detail)

v3.20.2
Acquisitions - Summary of Amounts Allocated to Acquired Assets and Assumed Liabilities (Parenthetical) (Detail)
9 Months Ended
Sep. 30, 2020
Cortina Asset Management, LLC | Customer Relationships  
Business Acquisition [Line Items]  
Customer relationships term 15 years