Quarterly report pursuant to Section 13 or 15(d)

Leases - Assets and Liabilities (Details)

v3.19.1
Leases - Assets and Liabilities (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
Lessee, Lease, Description [Line Items]      
Right-of-use assets, net $ 21,939 $ 24,800  
Other non-current assets 333    
Property and equipment, net 180,555   $ 176,577
Lease liabilities      
Other current liabilities 4,197    
Other non-current liabilities 20,818    
Revenue - equipment 333    
Cost of sales - equipment 148    
Accounting Standards Update 2016-02      
Lessee, Lease, Description [Line Items]      
Right-of-use assets, net (21,939)    
Other non-current assets (333)    
Lease liabilities      
Other current liabilities (4,197)    
Other non-current liabilities (20,818)    
Revenue - equipment (333)    
Cost of sales - equipment (148)    
Assets Leased to Others      
Lessee, Lease, Description [Line Items]      
Property and equipment, net (148)    
Assets Leased to Others | Accounting Standards Update 2016-02      
Lessee, Lease, Description [Line Items]      
Property and equipment, net $ (148)