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Leases - Components of Net Lease Cost (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2019
USD ($)
Finance leases  
Amortization of right-of-use assets $ 503
Interest on lease liabilities 81
Operating lease cost 1,300
Short-term lease cost 80
Variable lease cost 344
Sublease income (87)
Net lease cost $ 2,221