Fair Value Of Financial Instruments And Long-Term Debt (Tables)

12 Months Ended

Apr. 30, 2012

Fair Value Of Financial Instruments And Long-Term Debt [Abstract]

Long-Term Debt At Carrying Amount

		As of April 30,
		2012	2011
Capitalized lease obligations discounted at 5.22% to 7.09% due in
various monthly installments through 2048 (Note 7)	$	9,645	10,344
Mortgage notes payable due in various installments through January
2013 with interest at 6%		22	503
5.72% senior notes due in 14 installments beginning September 30, 2012
and ending March 30, 2020		100,000	100,000
5.22% senior notes due August 9, 2020		569,000	569,000
		678,667	679,847
Less current maturities		10,737	1,167
	$	667,930	678,680

Aggregate Maturities Of Long-Term Debt

Years ended April 30,
2013	$	10,737
2014		15,759
2015		439
2016		15,278
2017		15,250
Thereafter		621,204
	$	678,667