Purchased Intangible Assets and Goodwill (Changes in Purchased Intangibles Balances) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Intangible Assets [Roll Forward]
Beginning balance	$ 14,565	$ 15,225
Amortization	(1,049)	(1,073)
Foreign currency impact	(131)	413
Ending balance	$ 13,385	$ 14,565

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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