Fair Value Fair Value (Summary Of Carrying Amounts And Estimated Fair Values Of Company's Financial Instruments) (Details) - USD ($) $ in Thousands	Jul. 31, 2016	Apr. 30, 2016	Jul. 31, 2015	Apr. 30, 2015
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash & cash equivalents	$ 306,871	$ 896,801	$ 1,299,382	$ 2,007,190
Cash and cash equivalents, Estimated Fair Value	306,871	896,801
Cash and cash equivalents - restricted, Carrying Amount	122,025	104,110	61,040
Cash and cash equivalents - restricted, Estimated Fair Value	122,025	104,110
Receivables, net	103,425	153,116	103,194
Receivables, net - short-term, Estimated Fair Value	103,425	153,116
Mortgage loans held for investment, less allowance for loan losses of $5,310, $7,659 and $5,518	192,375	202,385	230,130
Loans Receivable, Fair Value Disclosure	185,057	190,503
Investments in available-for-sale securities, Estimated Fair Value	1,123	1,133
Accounts Receivable, Net, Noncurrent	56,514	60,407	72,427
Receivables, net - long-term, Estimated Fair Value	56,514	60,407	72,427
Total Portfolio	196,074	206,208	235,848
Deposits, Estimated Fair Value	0	0	473,720
Long-term Debt	1,492,654	1,492,201
Long-term borrowings, Estimated Fair Value	1,606,364	1,566,098
Contingent consideration payments, carrying amount	8,347	8,657
Contingent consideration payments, estimated fair value	8,347	8,657
Level 1
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and cash equivalents, Estimated Fair Value			1,299,382
Cash and cash equivalents - restricted, Estimated Fair Value			61,040
Receivables, net - short-term, Estimated Fair Value			103,194
Level 3
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans Receivable, Fair Value Disclosure			184,277
Long-term Debt			502,759
Long-term borrowings, Estimated Fair Value			552,431
Contingent consideration payments, carrying amount			10,650
Contingent consideration payments, estimated fair value			10,650
Level 2
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments in available-for-sale securities, Estimated Fair Value			407,426
HRB Bank [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Deposits, Carrying Amount	$ 0	$ 0	$ 477,145