Fair Value Of Financial Instruments (Tables)

6 Months Ended

Oct. 31, 2012

Fair Value Disclosures [Abstract]

Fair Value Of Financial Instruments

									(in 000s)
As of		October 31, 2012				April 30, 2012
		Carrying		Estimated		Carrying		Estimated	Fair Value
		Amount		Fair Value		Amount		Fair Value	Hierarchy
Assets:
Cash and cash equivalents	$	1,260,901	$	1,260,901	$	1,944,334	$	1,944,334	Level 1
Cash and cash equivalents – restricted		38,667		38,667		48,100		48,100	Level 1
Receivables, net – short-term		124,511		124,511		193,858		193,858	Level 1
Mortgage loans held for investment, net		370,850		226,885		406,201		248,535	Level 3
Investments in available-for- sale securities		389,654		389,654		372,352		372,352	Level 2
Receivables, net – long-term		134,359		134,359		127,468		127,468	Level 1 & 3
Note receivable (including interest)		58,049		64,508		55,444		55,444	Level 3
Liabilities:
Deposits		795,519		795,227		833,047		831,251	Level 1 & 3
Long-term debt		1,506,803		1,540,333		1,040,549		1,077,223	Level 3