Annual report pursuant to Section 13 and 15(d)

Deferred Costs Additional Details (Details)

v3.20.4
Deferred Costs Additional Details (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Finite-lived intangible assets, accumulated amortization $ 60,330 $ 57,150
Amortization of intangible assets $ 5,970 $ 9,300