Quarterly report pursuant to Section 13 or 15(d)

Leases - Components of operating lease costs (Details)

v3.19.1
Leases - Components of operating lease costs (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2019
USD ($)
Lessee, Lease, Description [Line Items]  
Operating lease cost $ 6,012
Variable lease cost 252
Lease cost 6,264
Unrelated Parties [Member]  
Lessee, Lease, Description [Line Items]  
Operating lease cost 5,436
Variable lease cost 101
Lease cost 5,537
Related Parties [Member]  
Lessee, Lease, Description [Line Items]  
Operating lease cost 576
Variable lease cost 151
Lease cost $ 727