Annual report pursuant to Section 13 and 15(d)

Leases (Narrative) (Details)

v3.20.4
Leases (Narrative) (Details)
$ in Thousands
Dec. 31, 2020
USD ($)
Lessee, Lease, Description [Line Items]  
Joint owner obligation $ 16,400
Future lease liabilities $ 23,728
Maximum [Member]  
Lessee, Lease, Description [Line Items]  
Lease terms 35 months
Minimum [Member]  
Lessee, Lease, Description [Line Items]  
Lease terms 21 months