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Intangible Assets - Expected Amortization of Intangible Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Intangible Assets      
December 31, 2021 $ 5,886    
December 31, 2022 4,718    
December 31, 2023 4,088    
December 31, 2024 4,089    
December 31, 2025 3,079    
Thereafter 4,600    
Subject to amortization 26,460    
Trademarks 736    
Total intangible assets $ 27,196 $ 36,209 $ 45,462