Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Allowance for credit losses	$ 2,573	$ 2,545
Amounts pledged	705,835	546,334
Accumulated amortization	58,350	54,919
Accumulated allowance	8,722	8,444
Net accumulated depreciation	106,206	104,961
Unamortized Debt Issuance Expense	1,011	1,132
Deferred tax assets, gross	$ 61,346	$ 63,481
Class A Stock [Member]
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	13,263,532	13,238,486
Common stock, shares outstanding (in shares)	13,263,532	13,238,486
Common stock, par value (dollars per share)	$ 0.001	$ 0.001
Class B Stock [Member]
Common stock, shares authorized (in shares)	99,665	99,665
Common stock, shares issued (in shares)	99,665	99,665
Common stock, shares outstanding (in shares)	99,665	99,665
Common stock, par value (dollars per share)	$ 0.001	$ 0.001