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Significant Accounting Policies - Activity in Polaris Accrued Warranty Reserve (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Activity in Product Warranty Reserve [Roll Forward]
Balance at beginning of period	$ 47,723	$ 44,355
Additions charged to expense	8,836	8,392
Warranty claims paid	(15,618)	(12,317)
Balance at end of period	$ 40,941	$ 40,430

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

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