Fair Value Fair Value (Summary Of Carrying Amounts And Estimated Fair Values Of Company's Financial Instruments) (Details) - USD ($) $ in Thousands	Jan. 31, 2016	Sep. 01, 2015	Apr. 30, 2015	Jan. 31, 2015	Apr. 30, 2014
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash & cash equivalents	$ 189,511		$ 2,007,190	$ 1,321,134	$ 2,185,307
Cash and cash equivalents, Estimated Fair Value	189,511		2,007,190
Cash and cash equivalents - restricted, Carrying Amount	69,649		91,972	51,085
Cash and cash equivalents - restricted, Estimated Fair Value	69,649		91,972
Receivables, net	829,774		167,964	777,453
Receivables, net - short-term, Estimated Fair Value	829,774		167,964
Mortgage loans held for investment, less allowance for loan losses of $6,931, $9,375 and $7,886	212,106		239,338	245,663
Loans Receivable, Fair Value Disclosure	174,813		190,196
Investments in available-for-sale securities, Estimated Fair Value	1,145		441,709	375,728
Accounts Receivable, Net, Noncurrent	76,471		80,867	102,428
Receivables, net - long-term, Estimated Fair Value	76,471		80,867	102,428
Total Portfolio	217,249		245,216	252,965
Deposits, Carrying Amount		$ 419,000
Deposits, Estimated Fair Value	0		737,261	1,273,283
Long-term Debt	2,627,750		506,088
Long-term borrowings, Estimated Fair Value	2,709,807		556,769
Contingent consideration payments, carrying amount	13,903		10,667
Contingent consideration payments, estimated fair value	13,903		10,667
Level 1
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and cash equivalents, Estimated Fair Value				1,321,134
Cash and cash equivalents - restricted, Estimated Fair Value				51,085
Receivables, net - short-term, Estimated Fair Value				777,453
Level 3
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans Receivable, Fair Value Disclosure				190,422
Long-term Debt				506,241
Long-term borrowings, Estimated Fair Value				558,693
Contingent consideration payments, carrying amount				12,848
Contingent consideration payments, estimated fair value				12,848
Level 2
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments in available-for-sale securities, Estimated Fair Value				375,728
HRB Bank [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Deposits, Carrying Amount	$ 0		$ 744,699	$ 1,286,582