Quarterly report pursuant to Section 13 or 15(d)

Leases - Components of lease expense (Details)

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Leases - Components of lease expense (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2019
USD ($)
Components of lease expense:  
Operating lease cost $ 12,158
Short-term lease cost 3,005
Variable lease cost 1,377
Sublease income (154)
Net lease cost $ 16,386