Leases (Lease Costs) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Components of lease expense:
Operating lease expense	$ 2,029	$ 1,908
Less sublease income	122	126
Net lease expense	1,907	1,782
Cash flows information related to leases:
Operating cash outflow from operating leases	$ 1,639	$ 1,800