Guarantor Subsidiaries And Non-Guarantor Subsidiaries (Supplemental Condensed Consolidating Statement Of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Oct. 31, 2014	Oct. 31, 2013
Net cash (used in) provided by operating activities	$ 24,479	$ 16,346
Capital expenditures	(27,756)	(33,804)
Acquisition of businesses	(182,500)	0
Other investing activities, net	629	100
Net cash used in investing activities	(209,627)	(33,704)
Proceeds from Issuance of Other Long-term Debt	213,000	0
Repayments of Long-term Debt	(30,253)	0
Dividends paid	(15,061)	(7,489)
Other financing activities, net	2,912	445
Advances	0	0
Net cash provided by (used in) financing activities	170,598	(7,044)
Effect of exchange rate changes on cash and cash equivalents	(16)	23
Net increase (decrease) in cash and cash equivalents	(14,566)	(24,379)
Beginning of period	44,406	138,604
End of period	29,840	114,225
Parent Company [Member]
Net cash (used in) provided by operating activities	(38,937)	(44,375)
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
Dividends paid	(15,061)	(7,489)
Other financing activities, net	2,355	2,969
Advances	51,643	48,895
Net cash provided by (used in) financing activities	38,937	44,375
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	63,073	61,344
Capital expenditures	(27,471)	(33,530)
Acquisition of businesses	(182,500)
Other investing activities, net	617	93
Net cash used in investing activities	(209,354)	(33,437)
Proceeds from Issuance of Other Long-term Debt	213,000
Repayments of Long-term Debt	(30,022)
Dividends paid	0	0
Other financing activities, net	392	(2,858)
Advances	(51,643)	(48,895)
Net cash provided by (used in) financing activities	131,727	(51,753)
Effect of exchange rate changes on cash and cash equivalents	82	(71)
Net increase (decrease) in cash and cash equivalents	(14,472)	(23,917)
Beginning of period	35,070	130,970
End of period	20,598	107,053
Other Subsidiaries [Member]
Net cash (used in) provided by operating activities	343	(623)
Capital expenditures	(285)	(274)
Acquisition of businesses	0
Other investing activities, net	12	7
Net cash used in investing activities	(273)	(267)
Proceeds from Issuance of Other Long-term Debt	0
Repayments of Long-term Debt	(231)
Dividends paid	0	0
Other financing activities, net	165	334
Advances	0	0
Net cash provided by (used in) financing activities	(66)	334
Effect of exchange rate changes on cash and cash equivalents	(98)	94
Net increase (decrease) in cash and cash equivalents	(94)	(462)
Beginning of period	9,336	7,634
End of period	$ 9,242	$ 7,172