Debt Obligations (Changes in Accretable Yield on Securitized Financings) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jul. 01, 2017
Accretable Yield Movement on Acquired Securitized Financings
Balance at the beginning of the period	$ 3,515	$ 7,636
Accretion	(803)	(871)
Adjustment to cash flows	(15)	(99)
Balance at the end of the period	$ 2,697	$ 6,666