XML 73 R59.htm IDEA: XBRL DOCUMENT v3.19.3
Leases Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2018
Dec. 31, 2018
Lessee, Lease, Description [Line Items]      
Lease expense $ 3,965 $ 10,658  
Equipment      
Lessee, Lease, Description [Line Items]      
Assets under equipment leases, gross     $ 657
Leased assets, depreciation expense $ 3 $ 113