Debt Obligations (Changes in Accretable Yield on Securitized Financings) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016
Accretable Yield Movement on Acquired Securitized Financings
Balance at the beginning of the period	$ 6,666	$ 11,459	$ 7,636	$ 12,333
Accretion	(846)	(938)	(1,716)	(1,906)
Adjustment to cash flows	(111)	(731)	(211)	(637)
Balance at the end of the period	$ 5,709	$ 9,790	$ 5,709	$ 9,790