Derivative Instruments and Hedging Activities - Gain Loss On Derivative Cash Flow Hedges Reclassified From AOCI Into Income (Details) - Not Designated as Hedging Instrument - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 29, 2019	Sep. 30, 2018	Sep. 29, 2019	Sep. 30, 2018
Derivative
Amount of Gain/(Loss) Recognized in Income	$ 1,703	$ (85)	$ 1,452	$ 59
Foreign currency contracts \| Motorcycle, Cost of Goods Sold
Derivative
Amount of Gain/(Loss) Recognized in Income	1,719	0	1,602	0
Commodity contracts \| Motorcycle, Cost of Goods Sold
Derivative
Amount of Gain/(Loss) Recognized in Income	(15)	(85)	(8)	59
Interest rate cap \| Interest rate cap
Derivative
Amount of Gain/(Loss) Recognized in Income	$ (1)	$ 0	$ (142)	$ 0

Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4CC
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL109998890-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959

Name:	us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration