Organization and Significant Accounting Policies Activity in Polaris Accrued Warranty Reserve (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Activity in Product Warranty Reserve [Roll Forward]
Balance at beginning of period	$ 53,104	$ 52,818	$ 47,723
Additions to warranty reserve through acquisitions	250	160	1,602
Additions charged to expense	73,716	61,888	56,857
Warranty claims paid	(70,596)	(61,762)	(53,364)
Balance at end of period	$ 56,474	$ 53,104	$ 52,818