Asset-Backed Financing (Servicing Activities) (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Apr. 01, 2018	Dec. 31, 2018
Transfers and Servicing [Abstract]
Current unpaid balance - on-balance sheet retail motorcycle finance receivables	$ 6,159,058	$ 5,923,564	$ 6,185,350
Current unpaid balance - off-balance sheet retail motorcycle finance receivables	67,062	127,643	79,613
Current unpaid balance - total serviced retail motorcycle finance receivables	6,226,120	6,051,207	6,264,963
Delinquent - on-balance sheet retail motorcycle finance receivables	201,142	166,560	228,015
Delinquent - off-balance sheet retail motorcycle finance receivables	1,194	1,652	1,658
Delinquent - total serviced retail motorcycle finance receivables	202,336	168,212	$ 229,673
Credit losses net of recoveries - on-balance sheet retail motorcycle finance receivables	33,504	32,173
Credit losses net of recoveries - off-balance sheet retail motorcycle finance receivables	231	361
Credit losses net of recoveries - total serviced retail motorcycle finance receivables	$ 33,735	$ 32,534

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

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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (e)(5)
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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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- Definition

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+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
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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://fasb.org/us-gaap/role/ref/legacyRef
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- References

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