Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Oct. 31, 2014	Oct. 31, 2013
Statement of Cash Flows [Abstract]
Repayments of Long-term Debt	$ 400,000	$ 0
NET CASH USED IN OPERATING ACTIVITIES	(627,577)	(492,373)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of available-for-sale securities	(100)	(45,158)
Maturities of and payments received on available-for-sale securities	49,013	55,615
Principal payments on mortgage loans held for investment, net	13,451	24,340
Purchases of property and equipment	(70,927)	(86,926)
Payments made for business acquisitions, net of cash acquired	94,230	20,927
Franchise loans:
Loans funded	(18,251)	(22,114)
Payments received	29,637	15,883
Other, net	10,685	15,255
Net cash provided by (used in) investing activities	(80,722)	(64,032)
CASH FLOWS FROM FINANCING ACTIVITIES:
Customer banking deposits, net	(316,269)	(275,800)
Dividends paid	(109,871)	(109,324)
Proceeds from exercise of stock options	14,477	24,536
Other, net	(33,639)	(31,948)
Net cash used in financing activities	(845,302)	(392,536)
Effects of exchange rates on cash	(4,216)	(7,871)
Net decrease in cash and cash equivalents	(1,557,817)	(956,812)
Cash and cash equivalents at beginning of the period	2,185,307	1,747,584
Cash and cash equivalents at end of the period	627,490	790,772
SUPPLEMENTARY CASH FLOW DATA:
Income taxes paid, net of refunds received	157,680	116,099
Interest paid on borrowings	27,379	27,804
Interest paid on deposits	341	1,180
Transfers of foreclosed loans to other assets	3,155	3,889
Accrued additions to property and equipment	3,243	6,729
Transfer of mortgage loans held for investment to held for sale	0	7,608
Conversion of investment security	$ 5,000	$ 0