Goodwill And Intangible Assets Intangible Assets Acquired (Details) $ in Thousands	12 Months Ended
	Apr. 30, 2016 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 74,855
Weighted-Average Life (in years)	5 years
Reacquired franchise rights
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 23,412
Weighted-Average Life (in years)	6 years
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 36,162
Weighted-Average Life (in years)	6 years
Computer Software, Intangible Asset [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 14,469
Weighted-Average Life (in years)	3 years
Noncompete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 812
Weighted-Average Life (in years)	5 years