Income Tax (Components of Deferred Tax Asset) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 21, 2017	Dec. 31, 2016
Deferred tax assets relating to:
Net operating loss carryforwards	$ 20,476		$ 25,880
Loan loss reserve	27,186		40,897
Imputed interest income	424		800
Deferred rent	1,892		2,670
Miscellaneous items	45		174
Total gross deferred tax assets	50,023		70,421
Deferred tax liabilities:
Internally developed software	3,912		2,224
Property, equipment and software	4,242		6,747
Origination costs	4,078		7,417
Miscellaneous items	40		430
Total gross deferred tax liabilities	12,272		16,818
Net deferred tax asset	37,751		53,603
Less: valuation allowance	(37,751)	$ (56,600)	(53,603)
Net deferred tax asset less valuation allowance	$ 0		$ 0