Fair Value Fair Value (Summary Of Carrying Amounts And Estimated Fair Values Of Company's Financial Instruments) (Details) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2014	Apr. 30, 2014	Jul. 31, 2013	Apr. 30, 2013
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash & cash equivalents	$ 1,429,489	$ 2,185,307	$ 1,163,876	$ 1,747,584
Cash and cash equivalents, Estimated Fair Value	1,429,489	2,185,307
Cash and cash equivalents - restricted, Carrying Amount	71,917	115,319	55,477
Cash and cash equivalents - restricted, Estimated Fair Value	71,917	115,319
Receivables, net - short-term, Carrying Amount	122,315	191,618	121,309
Receivables, net - short-term, Estimated Fair Value	122,315	191,618
Mortgage loans held for investment, less allowance for loan losses of $10,561, $15,514 and $11,272	259,732	268,428	309,681
Loans Receivable, Fair Value Disclosure	193,920	192,281
Investments in available-for-sale securities, Carrying Amount	4,289	4,329	487,033
Investments in available-for-sale securities, Estimated Fair Value	408,063	427,824	487,033
Accounts Receivable, Net, Noncurrent	101,146	111,795	198,088
Receivables, net - long-term, Estimated Fair Value	101,146	111,795
Total Portfolio	268,087	277,423	322,454
Deposits, Carrying Amount	465,000
Deposits, Estimated Fair Value	480,729	765,376
Long-term borrowings, Carrying Amount	906,419	906,474
Long-term borrowings, Estimated Fair Value	965,650	955,050
Cusiness Combination, Contingent Consideration, at Fair Value	9,168	9,206
Business Combination, Contingent Consideration, Liability	9,168	9,206
Level 1
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and cash equivalents, Estimated Fair Value			1,163,876
Cash and cash equivalents - restricted, Estimated Fair Value			55,477
Receivables, net - short-term, Estimated Fair Value			124,218
Level 3
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Loans Receivable, Fair Value Disclosure			194,882
Long-term borrowings, Carrying Amount			906,632
Long-term borrowings, Estimated Fair Value			931,300
Cusiness Combination, Contingent Consideration, at Fair Value			10,766
Business Combination, Contingent Consideration, Liability			10,766
Level 2
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investments in available-for-sale securities, Estimated Fair Value			487,033
Level 1 And 3
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Accounts Receivable, Net, Noncurrent			198,088
Receivables, net - long-term, Estimated Fair Value			210,234
Deposits, Carrying Amount			759,745
Deposits, Estimated Fair Value			760,449
HRB Bank [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Deposits, Carrying Amount	$ 483,477	$ 770,288