Annual report pursuant to Section 13 and 15(d)

Leases (Details)

v3.20.4
Leases (Details) - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Lessee, Lease, Description [Line Items]      
Net gain on extinguishment of lease liabilities   $ (10,100,000)  
Operating Leases, Future Minimum Payments, Remainder of Fiscal Year $ 9,032,000    
Operating Leases, Future Minimum Payments, Due in Two Years 7,336,000    
Operating Leases, Future Minimum Payments, Due in Three Years 3,694,000    
Operating Leases, Future Minimum Payments, Due in Four Years 2,958,000    
Operating Leases, Future Minimum Payments, Due in Five Years 2,844,000    
Operating Leases, Future Minimum Payments, Due Thereafter 4,794,000    
Operating Leases, Future Minimum Payments Due 30,658,000    
Lessee, Operating Lease, Liability, Undiscounted Excess Amount 2,655,000    
Unrealized gain/loss on translation to reporting currency 1,013,000    
Operating Lease, Liability 29,006,000    
Operating Lease, Liability, Current $ 8,144,000 $ 4,810,000  
Lessee, Operating Lease, Renewal Term 5 years    
Operating Lease, Weighted Average Discount Rate, Percent 4.00% 5.00%  
Operating Lease, Weighted Average Remaining Lease Term 4 years 7 months 6 days 2 years 10 months 24 days  
Operating Lease, Cost $ 5,200,000 $ 3,100,000 $ 4,500,000
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability 15,900,000 500,000  
Operating Leases, Rent Expense, Sublease Rentals 400,000 1,200,000 2,400,000
Operating Lease, Liability, Noncurrent 20,862,000 9,335,000  
Operating Leases, Future Sublease Income, Due Thereafter 100,000    
Impairment of leased right-of-use assets 1,508,000 9,240,000 0
Income statement impact, lease termination   (1,200,000)  
Gain on extinguishment of lease liabilities 0 10,437,000 0
Other related liabilities, lease termination   300,000  
Impairment of Leasehold $ 319,000 $ 1,442,000 $ 735,000
Minimum [Member]      
Lessee, Lease, Description [Line Items]      
Lessee, Operating Lease, Term of Contract 2 years    
Maximum [Member]      
Lessee, Lease, Description [Line Items]      
Lessee, Operating Lease, Term of Contract 7 years