Other Comprehensive Income (Loss) (The Effect Of The Reclassifications From Other Comprehensive Income (Loss) To Earnings) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustments, Before Tax	$ (50)	$ 157	$ (252)	$ 587
Foreign currency translation adjustments, Tax	0	(35)	0	(173)
Foreign currency translation adjustments, Net of Tax	(50)	122	(252)	414
Net change related to available-for-sale securities: Unrealized gains (losses), Before Tax	3	0	(33)	31
Net change related to available-for-sale securities: Unrealized gains (losses), Tax	0	0	8	(11)
Net change related to available-for-sale securities: Unrealized gains (losses), Net of Tax	3	0	(25)	20
Reclassification adjustments for gain included in interest income and other, Before Tax	(3)	0	(3)	0
Reclassification adjustments for gain included in interest income and other, Tax	0	0	0	0
Reclassification adjustments for gain included in interest income and other, Net of Tax	(3)	0	(3)	0
Net changes related to available-for-sale securities	0	0	(36)	31
Net changes related to available-for-sale securities, Tax	0	0	8	(11)
Net changes related to available-for-sale securities, Net of Tax	0	0	(28)	20
Other comprehensive income (loss), before tax	(50)	157	(288)	618
Other comprehensive income (loss), Tax	0	(35)	8	(184)
Other comprehensive income (loss), net of tax	$ (50)	$ 122	$ (280)	$ 434