Leases (Schedule of Lease Cost for All Leases) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Lease, Cost [Abstract]
Operating lease cost	$ 1,038
Short-term lease cost	46
Variable lease cost	90
Sublease income	(161)
Total lease cost	1,013
Cash paid for operating leases included in operating activities	$ 998