Leases (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) Day	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease ROU asset (Note 10)	$ 1,977	$ 614
Total operating lease liability	$ 6,113	12,900
Number of leases abandoned | Day	14
Gain on settlement of leases	$ 3,483	0	$ 0
Restricted cash in prepaid expenses and other current assets	1,686	0	0
Lease expense for operating leases	13,000	$ 13,500	$ 13,000
Israel
Lessee, Lease, Description [Line Items]
Restricted cash in prepaid expenses and other current assets	1,500
Australia
Lessee, Lease, Description [Line Items]
Restricted cash in prepaid expenses and other current assets	$ 200
Minimum
Lessee, Lease, Description [Line Items]
Operating leases remaining lease term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating leases remaining lease term	5 years