Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Allowance for credit losses	$ 2,491	$ 2,427
Amounts pledged	704,168	518,123
Net accumulated depreciation	101,972	103,547
Deferred Tax Assets, Gross	64,085	68,622
Notes Receivable, Accumulated Amortization	48,448	42,211
Notes Receivable, Allowance for Credit Losses	$ 9,135	$ 8,606
Class A Stock [Member]
Common Stock, Shares Authorized	50,000,000	50,000,000
Common stock, shares issued	13,650,149	13,530,688
Common stock, shares outstanding	13,650,149	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