Leases (Narrative) (Details) $ in Thousands	1 Months Ended	12 Months Ended
	Dec. 31, 2020 USD ($) item	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Leases [Abstract]
Lease renewal term	1 year	1 year
Operating lease liability	$ 35,783	$ 35,783	$ 22,124
Operating lease asset	34,325	34,325	20,858
Minimum operating lease payments of lessee that has not yet commenced	$ 900	900
Cash paid for leases expenses		6,600	6,900
Right-of-use assets in exchange for new operating lease liabilities		$ 19,400	$ 1,600
Number of leases executed | item	2