Leases (Lease Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Components of lease expense:
Operating lease expense	$ 1,832	$ 1,910	$ 5,788	$ 5,730
Less sublease income	53	119	239	371
Net lease expense	1,779	1,791	5,549	5,359
Cash flows information related to leases:
Operating cash outflow from operating leases	$ 1,796	$ 1,812	$ 5,265	$ 5,420