Fair Value Fair Value (Summary Of Carrying Amounts And Estimated Fair Values Of Company's Financial Instruments) (Details) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2014	Apr. 30, 2014	Oct. 31, 2013	Apr. 30, 2013
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash & cash equivalents	$ 627,490	$ 2,185,307	$ 790,772	$ 1,747,584
Cash and cash equivalents, Estimated Fair Value	627,490	2,185,307
Cash and cash equivalents - restricted, Carrying Amount	55,543	115,319	47,521
Cash and cash equivalents - restricted, Estimated Fair Value	55,543	115,319
Receivables, net - short-term, Carrying Amount	107,705	191,618	131,701
Receivables, net - short-term, Estimated Fair Value	107,705	191,618
Mortgage loans held for investment, less allowance for loan losses of $9,761, $12,704 and $11,272	251,092	268,428	295,907
Loans Receivable, Fair Value Disclosure	192,411	192,281
Investments in available-for-sale securities, Carrying Amount	9,774	4,329	465,344
Investments in available-for-sale securities, Estimated Fair Value	390,954	427,824	465,344
Accounts Receivable, Net, Noncurrent	101,805	111,795	198,597
Receivables, net - long-term, Estimated Fair Value	101,805	111,795
Total Portfolio	258,728	277,423	306,103
Deposits, Carrying Amount	437,000
Deposits, Estimated Fair Value	452,351	765,376
Long-term Debt	506,360	906,474
Long-term borrowings, Estimated Fair Value	550,332	955,050
Cusiness Combination, Contingent Consideration, at Fair Value	10,555	9,206
Business Combination, Contingent Consideration, Liability	10,555	9,206
Level 1
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and cash equivalents, Estimated Fair Value			790,772
Cash and cash equivalents - restricted, Estimated Fair Value			47,521
Receivables, net - short-term, Estimated Fair Value			133,884
Level 3
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans Receivable, Fair Value Disclosure			211,690
Long-term Debt			906,581
Long-term borrowings, Estimated Fair Value			947,350
Cusiness Combination, Contingent Consideration, at Fair Value			12,454
Business Combination, Contingent Consideration, Liability			12,454
Level 2
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments in available-for-sale securities, Estimated Fair Value			465,344
Level 1 And 3
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Receivables, net - long-term, Estimated Fair Value			206,481
Deposits, Carrying Amount			656,305
Deposits, Estimated Fair Value			656,300
HRB Bank [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Deposits, Carrying Amount	$ 455,308	$ 770,288