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Leases - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2019
Jan. 01, 2019
Lessee, Lease, Description [Line Items]        
Operating right-of-use assets     $ 18,497  
Operating lease liabilities     24,097  
Finance lease ROU     6,303  
Finance lease liability     $ 6,370  
Rental expense $ 10,600 $ 6,900    
Accounting Standards Update 2016-02        
Lessee, Lease, Description [Line Items]        
Operating right-of-use assets       $ 31,100
Operating lease liabilities       37,100
Finance lease ROU       6,000
Finance lease liability       $ 6,000