Organization and Significant Accounting Policies - Activity in Polaris Accrued Warranty Reserve (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Activity in Product Warranty Reserve [Roll Forward]
Balance at beginning of year	$ 56,474	$ 53,104	$ 52,818
Additions to reserve through acquisitions	147	250	160
Additions charged to expense	194,996	73,716	61,888
Less: warranty claims paid	(132,343)	(70,596)	(61,762)
Balance at end of year	$ 119,274	$ 56,474	$ 53,104