Basis of Presentation Cash and Cash Equivalents and Restricted Cash reconciliation (Details) - USD ($) $ in Thousands	Sep. 29, 2018	Mar. 31, 2018	Sep. 30, 2017	Apr. 01, 2017
Cash and Cash Equivalents [Line Items]
Cash and Cash Equivalents, at Carrying Value	$ 66,183	$ 76,792	$ 47,973
Restricted Cash, Current	1,100	0	0
Restricted Cash	0	1,093	1,098
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 67,283	$ 77,885	$ 49,071	$ 57,732