Other Comprehensive Income (Loss) (The Effect Of The Reclassifications From Other Comprehensive Income (Loss) To Earnings) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustments, Before Tax	$ 161	$ (76)	$ 430	$ 194
Foreign currency translation adjustments, Tax	(59)	0	(138)	0
Foreign currency translation adjustments, Net of Tax	102	(76)	292	194
Net change related to available-for-sale securities: Unrealized gains, Before Tax	11	15	31	68
Net change related to available-for-sale securities: Unrealized gains, Tax	(4)	0	(11)	0
Net change related to available-for-sale securities: Unrealized gains, Net of Tax	7	15	20	68
Reclassification adjustment, Before Tax	0	0	0	0
Reclassification adjustment, Tax	0	0	0	0
Reclassification adjustment, Net of Tax	0	0	0	0
Total unrealized gains on available-for-sale securities	11	15	31	68
Total net changes related to available-for-sale securities, Tax	(4)	0	(11)	0
Total net changes related to available-for-sale securities, Net of Tax	7	15	20	68
Net changes related to foreign exchange forward contracts: Unrealized gains (losses), Before Tax	0	(7)	0	53
Net changes related to foreign exchange forward contracts: Unrealized gains (losses), Tax	0	0	0	0
Net changes related to foreign exchange forward contracts: Unrealized gains (losses), Net of Tax	0	(7)	0	53
Reclassification adjustment, Before Tax	0	5	0	36
Total unrealized gains (losses) on foreign exchange forward contracts	0	(2)	0	89
Total net changes related to foreign exchange forward contracts, Tax	0	0	0	0
Total net changes related to foreign exchange forward contracts, Net of Tax	0	(2)	0	89
Other comprehensive income (loss), before tax	172	(63)	461	351
Other comprehensive income (loss), Tax	(63)	0	(149)	0
Other comprehensive income (loss), net of tax	109	(63)	312	351
Cost of Revenues [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustment, Before Tax	0	2	0	27
Reclassification adjustment, Tax	0	0	0	0
Reclassification adjustment , Net of Tax	0	2	0	27
Research and Development Expense [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustment, Before Tax	0	2	0	6
Reclassification adjustment, Tax	0	0	0	0
Reclassification adjustment , Net of Tax	0	2	0	6
Selling, General and Administrative Expenses [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustment, Before Tax	0	1	0	3
Reclassification adjustment, Tax	0	0	0	0
Reclassification adjustment , Net of Tax	$ 0	$ 1	$ 0	$ 3