Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Allowance for credit losses	$ 2,439	$ 2,427
Amounts pledged	501,643	518,123
Net accumulated depreciation	105,809	103,547
Deferred Tax Assets, Gross	62,254	68,622
Notes Receivable, Accumulated Amortization	35,596	42,211
Notes Receivable, Allowance for Credit Losses	$ 9,062	$ 8,606
Class A Stock [Member]
Common Stock, Shares Authorized	50,000,000	50,000,000
Common stock, shares issued	13,634,831	13,530,688
Common stock, shares outstanding	13,634,831	13,530,688
Common Stock, Par or Stated Value Per Share	$ 0.001	$ 0.001
Class B Stock [Member]
Common Stock, Shares Authorized	99,680	99,680
Common stock, shares issued	99,680	99,680
Common stock, shares outstanding	99,680	99,680
Common Stock, Par or Stated Value Per Share	$ 0.001	$ 0.001