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Leases - Lease Cost (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
Leases [Abstract]  
Operating lease cost $ 4,768
Short-term lease cost 815
Variable lease cost 1,242
Sublease income (336)
Total lease cost 6,489
Operating cash flows 5,600
Operating leases $ 4,066