Acquisitions Student Brands (Details) - Student Brands [Member] $ in Thousands	12 Months Ended
	Apr. 28, 2018 USD ($) Rate
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill, Acquired During Period	$ 31,782
Business Acquisition, Percentage of Voting Interests Acquired | Rate	100.00%
Finite-lived Intangible Assets Acquired	$ 28,300
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets	1,593
Business Combination, Consideration Transferred	61,997
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	4,626
Media Content [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 14,500
Finite-Lived Intangible Asset, Useful Life	5 years
Technology-Based Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 8,000
Finite-Lived Intangible Asset, Useful Life	5 years
Noncompete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 4,000
Finite-Lived Intangible Asset, Useful Life	3 years
Customer Lists [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 1,800
Finite-Lived Intangible Asset, Useful Life	2 years