Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
VIE finance receivables, allowances for losses	$ 6,832	$ 6,443
Other finance receivables, allowances for losses	1,684	1,899
Other receivables, allowance for losses	252	243
Fixed assets, accumulated depreciation	4,933	4,544
Intangible assets, accumulated amortization	$ 18,472	$ 17,781
Class A Common Stock
Common stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Common stock, authorized shares	500,000,000	500,000,000
Common stock, shares issued	12,037,816	11,220,358
Common stock, shares outstanding	12,033,887	11,216,429
Class B Common Stock
Common stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Common stock, authorized shares	500,000,000	500,000,000
Common stock, shares issued	14,001,583	14,001,583
Common stock, shares outstanding	13,161,563	13,984,065
Class C Common Stock
Common stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Common stock, authorized shares	500,000,000	500,000,000
Common stock, shares issued	0	0
Common stock, shares outstanding	0	0