Debt Obligations (Summarizes Securitized Financings) (Details) - USD ($) $ in Thousands		3 Months Ended
		Jun. 30, 2018	Mar. 31, 2018	Jul. 01, 2017	Apr. 01, 2017
Line of Credit Facility [Line Items]
Line of Credit Facility, Interest Rate During Period		4.90%
Line of Credit Facility, Remaining Borrowing Capacity		$ 5,000
Maximum Advance under Secured Credit Facility		80.00%
Line of Credit Facility, Frequency of Payment and Payment Terms		20 or 25 year amortization period with a balloon payment due upon maturity
Acquired Securitized Financings
Securitized financings - contractual amount		$ 44,226	$ 46,591
Purchase Discount
Accretable yield		(2,697)	(3,515)	$ (6,666)	$ (7,636)
Non-accretable difference	[1]	0	0
Total securitized financings, net		$ 41,529	$ 43,076

[1] There is no non-accretable difference, as the contractual payments on acquired securitized financing are determined by the cash collections from the underlying loans.