Guarantor Subsidiaries And Non-Guarantor Subsidiaries (Supplemental Condensed Consolidating Statement Of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Net cash (used in) provided by operating activities	$ 245,878	$ 222,423	$ 185,419
Capital expenditures	(118,305)	(94,946)	(132,625)
Acquisition of businesses	0	(19,958)	(23,479)
Proceeds from Sale of Real Estate		11,090
Cash received from sale of real property	0	11,090	0
Other investing activities, net	399	(4,424)	150
Net cash used in investing activities	(117,906)	(108,238)	(155,954)
Repurchases of common stock	0	0	(30,365)
Proceeds from borrowings under other long-term debt	0	96,000	56,000
Repayments of Subordinated Debt	175,000	0	0
Payments of other long-term debt	(998)	(97,011)	(57,052)
Dividends paid	(45,021)	(28,362)	(24,249)
Other financing activities, net	(1,193)	7,583	2,144
Advances	0	0	0
Net cash used in financing activities	(222,212)	(21,790)	(53,522)
Effect of exchange rate changes on cash and cash equivalents	42	156	(33)
Net (decrease) increase in cash and cash equivalents	(94,198)	92,551	(24,090)
Beginning of period	138,604	46,053	70,143
End of period	44,406	138,604	46,053
Parent Company [Member]
Net cash (used in) provided by operating activities	(4,187)	(2,845)	(6,789)
Capital expenditures	0	0	0
Acquisition of businesses		0	0
Proceeds from Sale of Real Estate		0
Other investing activities, net	0	0	0
Net cash used in investing activities	0	0	0
Repurchases of common stock			(30,365)
Proceeds from borrowings under other long-term debt		0	0
Repayments of Subordinated Debt	175,000
Payments of other long-term debt	0	0	0
Dividends paid	(45,021)	(28,362)	(24,249)
Other financing activities, net	4,303	4,565	1,637
Advances	219,905	26,642	59,766
Net cash used in financing activities	4,187	2,845	6,789
Effect of exchange rate changes on cash and cash equivalents	0	0	0
Net (decrease) increase in cash and cash equivalents	0	0	0
Beginning of period	0	0	0
End of period	0	0	0
100% Owned Guarantor Subsidiaries [Member]
Net cash (used in) provided by operating activities	248,889	225,434	191,831
Capital expenditures	(117,330)	(94,041)	(132,025)
Acquisition of businesses		(19,958)	(24,311)
Proceeds from Sale of Real Estate		11,090
Other investing activities, net	379	(4,344)	150
Net cash used in investing activities	(116,951)	(107,253)	(156,186)
Repurchases of common stock			0
Proceeds from borrowings under other long-term debt		96,000	56,000
Repayments of Subordinated Debt	0
Payments of other long-term debt	(779)	(96,803)	(56,855)
Dividends paid	0	0	0
Other financing activities, net	(7,165)	2,177	400
Advances	(219,905)	(26,867)	(60,175)
Net cash used in financing activities	(227,849)	(25,493)	(60,630)
Effect of exchange rate changes on cash and cash equivalents	11	(98)	0
Net (decrease) increase in cash and cash equivalents	(95,900)	92,590	(24,985)
Beginning of period	130,970	38,380	63,365
End of period	35,070	130,970	38,380
Other Subsidiaries [Member]
Net cash (used in) provided by operating activities	1,176	(166)	377
Capital expenditures	(975)	(905)	(600)
Acquisition of businesses		0	832
Proceeds from Sale of Real Estate		0
Other investing activities, net	20	(80)	0
Net cash used in investing activities	(955)	(985)	232
Repurchases of common stock			0
Proceeds from borrowings under other long-term debt		0	0
Repayments of Subordinated Debt	0
Payments of other long-term debt	(219)	(208)	(197)
Dividends paid	0	0	0
Other financing activities, net	1,669	841	107
Advances	0	225	409
Net cash used in financing activities	1,450	858	319
Effect of exchange rate changes on cash and cash equivalents	31	254	(33)
Net (decrease) increase in cash and cash equivalents	1,702	(39)	895
Beginning of period	7,634	7,673	6,778
End of period	$ 9,336	$ 7,634	$ 7,673