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Leases - Narrative (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2019
USD ($)
lease_agreement
Jun. 30, 2019
USD ($)
lease_agreement
Lessee, Lease, Description [Line Items]    
Number of operating leases related to corporate headquarters and data center facility | lease_agreement 2 2
Right-of-use assets $ 7,300 $ 7,300
Lease liabilities 8,393 8,393
Right-of-use assets obtained in exchange for new operating lease liabilities   8,100
Cash paid for amounts included in the measurement of operating lease liabilities 600 1,200
Operating lease expense $ 600 $ 1,100
Minimum    
Lessee, Lease, Description [Line Items]    
Operating lease terms 3 years 3 years
Maximum    
Lessee, Lease, Description [Line Items]    
Operating lease terms 5 years 5 years
Corporate Headquarters    
Lessee, Lease, Description [Line Items]    
Operating lease option to renew, term 5 years 5 years