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Commitments And Contingencies (Tables)
 6 Months Ended
Oct. 31, 2016
Commitments and Contingencies Disclosure [Abstract]  
Schedule Of Deferred Revenue Related To The Peace Of Mind Program
Changes in deferred revenue balances related to our Peace of Mind® Extended Service Plan (POM) for both company-owned and franchise offices, which is included in deferred revenue and other liabilities in the consolidated balance sheets, are as follows:
(in 000s)
 
Six months ended October 31,
 
2016

 
2015

Balance, beginning of the period
 
$
204,342

 
$
189,779

Amounts deferred for new extended service plans issued
 
2,561

 
2,608

Revenue recognized on previous deferrals
 
(58,921
)
 
(54,943
)
Balance, end of the period
 
$
147,982

 
$
137,444