Restructuring Activity - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended	9 Months Ended
Sep. 30, 2017	Sep. 30, 2016
Restructuring Cost and Reserve [Line Items]
Charges (gains)	$ 0
Inventory Valuation Reserve
Restructuring Cost and Reserve [Line Items]
Charges (gains)		$ 452

Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan and expenses resulting from the write-down of assets. Excludes expenses related to a business combination, a discontinued operation or an asset retirement obligation.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

Name:	us-gaap_RestructuringCostsAndAssetImpairmentCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration