Leases (Lease Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Leases [Abstract]
Operating lease cost	$ 2,180	$ 2,179	$ 4,363	$ 4,358
Variable lease costs	324	117	440	290
Net lease cost	$ 2,504	$ 2,296	$ 4,803	$ 4,648