Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Abstract]
Valuation allowance	$ 460	$ 460
Undistributed earnings in its foreign operations	19,700
Net increase (decrease) in unrecognized tax benefit	(4,000)	4,000	$ (2,200)
Gross unrecognized tax benefits	$ 7,574	$ 3,612	$ 7,636	$ 5,459