Fair Value Fair Value (Summary Of Carrying Amounts And Estimated Fair Values Of Company's Financial Instruments) (Details) - USD ($) $ in Thousands	Oct. 31, 2015	Sep. 01, 2015	Apr. 30, 2015	Oct. 31, 2014	Apr. 30, 2014
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash & cash equivalents	$ 360,681		$ 2,007,190	$ 627,490	$ 2,185,307
Cash and cash equivalents, Estimated Fair Value	360,681		2,007,190
Cash and cash equivalents - restricted, Carrying Amount	42,781		91,972	55,543
Cash and cash equivalents - restricted, Estimated Fair Value	42,781		91,972
Receivables, net	94,760		167,964	107,705
Receivables, net - short-term, Estimated Fair Value	94,760		167,964
Mortgage loans held for investment, less allowance for loan losses of $7,412, $9,761 and $7,886	220,671		239,338	251,092
Loans Receivable, Fair Value Disclosure	180,437		190,196
Investments in available-for-sale securities, Estimated Fair Value	3,173		441,709	390,954
Accounts Receivable, Net, Noncurrent	75,275		80,867	101,805
Receivables, net - long-term, Estimated Fair Value	75,275		80,867	101,805
Total Portfolio	226,224		245,216	258,728
Deposits, Carrying Amount		$ 419,000
Deposits, Estimated Fair Value	0		737,261	452,351
Long-term Debt	1,502,746		506,088
Long-term borrowings, Estimated Fair Value	1,553,633		556,769
Contingent consideration payments, carrying amount	11,932		10,667
Contingent consideration payments, estimated fair value	11,932		10,667
Level 1
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and cash equivalents, Estimated Fair Value				627,490
Cash and cash equivalents - restricted, Estimated Fair Value				55,543
Receivables, net - short-term, Estimated Fair Value				107,705
Level 3
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans Receivable, Fair Value Disclosure				192,411
Long-term Debt				506,360
Long-term borrowings, Estimated Fair Value				550,332
Contingent consideration payments, carrying amount				10,555
Contingent consideration payments, estimated fair value				10,555
Level 2
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments in available-for-sale securities, Estimated Fair Value				390,954
HRB Bank [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Deposits, Carrying Amount	$ 0		$ 744,699	$ 455,308