XML 53 R42.htm IDEA: XBRL DOCUMENT v3.20.2
Acquired Intangible Assets, Acquired Assets and Liabilities and Amortization Expense (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Amortization of acquired intangible assets [Abstract]        
Amortization expense $ 2.0 $ 2.1 $ 4.1 $ 3.9
Estimated amortization expense, remainder of 2020 4.1   4.1  
Estimated amortization expense in year 2021 6.8   6.8  
Estimated amortization expense in year 2022 5.2   5.2  
Estimated amortization expense in year 2023 4.9   4.9  
Estimated amortization expense in years 2024 through 2034 33.7   33.7  
Trademarks and Trade Names [Member]        
Intangible assets acquired [Abstract]        
Amount of acquired indefinite-lived intangible assets $ 5.2   $ 5.2