Basis of Presentation New Accounting Pronouncements (Details) - USD ($)	3 Months Ended			9 Months Ended
	Dec. 29, 2018	Mar. 31, 2018	Dec. 30, 2017	Dec. 29, 2018	Dec. 30, 2017	Apr. 01, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash and Cash Equivalents, at Carrying Value	$ 192,869,000	$ 186,766,000	$ 138,974,000	$ 192,869,000	$ 138,974,000
Restricted cash	11,284,000	11,228,000	9,993,000	11,284,000	9,993,000
Restricted cash, Noncurrent	454,000	1,264,000	728,000	454,000	728,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	204,607,000	199,258,000	149,695,000	204,607,000	149,695,000	$ 144,839,000
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	5,900,000		$ 5,500,000	18,700,000	$ 15,600,000
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	454,000			454,000
Accounting Standards Update 2016-01 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	1,621,000			1,621,000
Nonoperating Income (Expense) [Member] | Accounting Standards Update 2016-01 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ (2,931,000)			(1,528,000)
Accrued Liabilities [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		$ 600,000		$ 2,488,000