Financial Information for Polaris Acceptance Reflecting Effects of Securitization Facility (Detail) (Polaris Acceptance, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Polaris Acceptance
Schedule of Investments [Line Items]
Revenues	$ 13,010	$ 8,811	$ 13,018
Interest and operating expenses	3,044	1,013	4,131
Net income	9,966	7,798	8,887
Finance receivables, net	226,742	166,025
Other assets	172	100
Total Assets	226,914	166,125
Notes payable/(receivable)	85,096	44,494
Other liabilities	3,384	7,655
Partners' capital	138,434	113,976
Total Liabilities and Partners' Capital	$ 226,914	$ 166,125