Asset-Backed Financing (Servicing Activities) (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 26, 2017	Mar. 27, 2016	Dec. 31, 2016
Transfers and Servicing [Abstract]
Servicing and ancillary fees	$ 600
Current unpaid balance - on-balance sheet retail motorcycle finance receivables	5,867,143	$ 5,868,921	$ 5,839,467
Current unpaid balance - off-balance sheet retail motorcycle finance receivables	212,764	0	236,706
Current unpaid balance - total serviced retail motorcycle finance receivables	6,079,907	5,868,921	6,076,173
Delinquent - on-balance sheet retail motorcycle finance receivables	162,386	147,954	221,393
Delinquent - off-balance sheet retail motorcycle finance receivables	1,476	0	1,858
Delinquent - total serviced retail motorcycle finance receivables	163,862	147,954	$ 223,251
Credit losses net of recoveries - on-balance sheet retail motorcycle finance receivables	32,902	28,117
Credit losses net of recoveries - off-balance sheet retail motorcycle finance receivables	414	0
Credit losses net of recoveries - total serviced retail motorcycle finance receivables	$ 33,316	$ 28,117

Assets And Any Other Financial Assets Managed Together, Delinquent Amount At End Of Period

No definition available.

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- Definition

Assets Securitized Or Asset-backed Financing Arrangement, Assets And Any Other Financial Assets Managed Together, Net Credit Losses During Period

+ References

No definition available.

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- Definition

Amount of net credit losses charged off.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (e)(5)
-URI http://asc.fasb.org/extlink&oid=64830801&loc=d3e107314-111719

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- Definition

Principal amount of transferred financial assets in which the transferor has continuing involvement with the assets underlying the transaction. Continuing involvement includes, but is not limited to, servicing, recourse, and restrictions on transferor's interests in transferred financial assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)(1)
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- Definition

The total amount of contractually specified servicing fees, late fees, and ancillary fees earned for each period for which results of operations are presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 2
-Subparagraph (c)
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- Definition

This is the amount of the financial instruments that are considered delinquent (past due) at the end of the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (e)(4)
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- Definition

Net credit losses are charge-offs and are based on total loans outstanding during the period.

+ References

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- Definition

Amount of transferred financial assets in which the transferor has continuing involvement with the assets underlying the transaction that have been derecognized. Continuing involvement includes, but is not limited to, servicing, recourse, and restrictions on transferor's interests in transferred financial assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
-Paragraph 4
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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (e)(4)
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- Definition

Amount of transferred financial assets in which the transferor has continuing involvement with the assets underlying the transaction that continue to be recognized in the statement of financial position. Includes, but is not limited to, servicing, recourse, and restrictions on transferor's interests in transferred financial assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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- References

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