XML 53 R42.htm IDEA: XBRL DOCUMENT v3.21.2
Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Business Acquisition [Line Items]        
Amortization expense $ 2.4 $ 2.6 $ 4.8 $ 5.3
CDI        
Business Acquisition [Line Items]        
Useful life     10 years