Guarantor Subsidiaries And Non-Guarantor Subsidiaries (Supplemental Condensed Consolidating Statement Of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Apr. 30, 2014	Apr. 30, 2013
Net cash (used in) provided by operating activities	$ 306,197	$ 291,345
Capital expenditures	(108,100)	(65,461)
Acquisition of businesses	0	(19,958)
Other investing activities, net	920	861
Net cash used in investing activities	(107,180)	(84,558)
Proceeds from Issuance of Other Long-term Debt	0	96,000
Repayments of Long-term Debt	(977)	(96,989)
Dividends paid	(29,998)	(20,905)
Other financing activities, net	732	6,778
Advances	0	0
Net cash provided by (used in) financing activities	(30,243)	(15,116)
Effect of exchange rate changes on cash and cash equivalents	53	11
Net increase (decrease) in cash and cash equivalents	168,827	191,682
Beginning of period	138,604	46,053
End of period	307,431	237,735
Parent Company [Member]
Net cash (used in) provided by operating activities	52,146	46,034
Capital expenditures	0	0
Acquisition of businesses		0
Other investing activities, net	0	0
Net cash used in investing activities	0	0
Proceeds from Issuance of Other Long-term Debt		0
Repayments of Long-term Debt	0	0
Dividends paid	(29,998)	(20,905)
Other financing activities, net	3,880	3,986
Advances	(26,028)	(29,115)
Net cash provided by (used in) financing activities	(52,146)	(46,034)
Effect of exchange rate changes on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	0	0
Beginning of period	0	0
End of period	0	0
100% Owned Guarantor Subsidiaries [Member]
Net cash (used in) provided by operating activities	252,610	244,970
Capital expenditures	(107,208)	(64,765)
Acquisition of businesses		(19,958)
Other investing activities, net	912	943
Net cash used in investing activities	(106,296)	(83,780)
Proceeds from Issuance of Other Long-term Debt		96,000
Repayments of Long-term Debt	(758)	(96,781)
Dividends paid	0	0
Other financing activities, net	(3,891)	2,608
Advances	26,028	29,065
Net cash provided by (used in) financing activities	21,379	30,892
Effect of exchange rate changes on cash and cash equivalents	(21)	(33)
Net increase (decrease) in cash and cash equivalents	167,672	192,049
Beginning of period	130,970	38,380
End of period	298,642	230,429
Other Subsidiaries [Member]
Net cash (used in) provided by operating activities	1,441	341
Capital expenditures	(892)	(696)
Acquisition of businesses		0
Other investing activities, net	8	(82)
Net cash used in investing activities	(884)	(778)
Proceeds from Issuance of Other Long-term Debt		0
Repayments of Long-term Debt	(219)	(208)
Dividends paid	0	0
Other financing activities, net	743	184
Advances	0	50
Net cash provided by (used in) financing activities	524	26
Effect of exchange rate changes on cash and cash equivalents	74	44
Net increase (decrease) in cash and cash equivalents	1,155	(367)
Beginning of period	7,634	7,673
End of period	$ 8,789	$ 7,306