Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Identifiable Intangible Assets - Additional Information (Details)

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Goodwill and Other Identifiable Intangible Assets - Additional Information (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]      
Impairment of finite lived intangible assets $ 0 $ 0  
Amortization of intangible assets $ 4,160,000 $ 1,265,000 $ 507,000