Leases (Lease Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Components of lease expense:
Operating lease expense	$ 1,926	$ 1,912	$ 3,956	$ 3,820
Less sublease income	63	126	186	252
Net lease expense	1,863	1,786	3,770	3,568
Cash flows information related to leases:
Operating Lease, Payments	$ 1,829	$ 1,808	$ 3,469	$ 3,608