Commitments And Contingencies (Tables)

9 Months Ended

Jan. 31, 2013

Commitments And Contingencies Disclosure [Abstract]

Schedule Of Deferred Revenue Related To The Peace Of Mind Program

				(in 000s)
Nine months ended January 31,		2013		2012
Balance, beginning of period	$	141,080	$	140,603
Amounts deferred for new guarantees issued		14,202		19,471
Revenue recognized on previous deferrals		(57,505)		(57,254)
Balance, end of period	$	97,777	$	102,820