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Goodwill and Intangible Assets - Additional Information (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Finite And Indefinite Lived Intangible Assets [Line Items]      
Impairment of goodwill and indefinite-lived intangible assets $ 0 $ 0 $ 0
Amortization of Intangible Assets 8,099,000 8,378,000 $ 9,277,000
Estimated amortization expense, 2019 7,571,000    
Estimated amortization expense, 2020 4,819,000    
Estimated amortization expense, 2021 2,278,000    
Estimated amortization expense, 2022 2,278,000    
Estimated amortization expense, 2023 2,278,000    
Trade Names [Member]      
Finite And Indefinite Lived Intangible Assets [Line Items]      
Carrying value of indefinite-lived intangible assets $ 9,782,000 $ 9,972,000