XML 70 R55.htm IDEA: XBRL DOCUMENT v3.20.4
Goodwill and Other Identifiable Intangible Assets - Additional Information (Details)
12 Months Ended
Dec. 31, 2020
USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]  
Goodwill, accumulated impairment loss $ 0
Impairment of finite lived intangible assets $ 0