Additional Balance Sheet And Cash Flow Information (Inventories, Net) (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jul. 01, 2012
Inventory [Line Items]
Raw materials and work in process	$ 116,334	$ 111,335	$ 116,166
Inventory at lower of FIFO cost or market	353,606	439,413	367,405
Excess of FIFO over LIFO cost	(45,889)	(45,889)	(44,359)
Inventories, net	307,717	393,524	323,046
Motorcycle Finished Goods [Member]
Inventory [Line Items]
Finished goods	111,188	205,660	120,199
Parts and Accessories Finished Goods [Member]
Inventory [Line Items]
Finished goods	$ 126,084	$ 122,418	$ 131,040