Debt (Schedule of Cash Paid for Interest) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Long-term Debt, Unclassified [Abstract]
Interest expense, net	$ 12,064	$ 14,032	$ 14,577
Interest income	2,156	574	136
Other non-cash adjustments	(529)	(647)	(671)
Cash paid for interest	$ 13,691	$ 13,959	$ 14,042