Goodwill and Acquisition-Related Intangible Assets - Narrative (Details)	12 Months Ended
Dec. 31, 2018 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill impairment	$ 0
Intangible asset, accumulated amortization	$ 5,100,000

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
-Name Accounting Standards Codification
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