Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011
Operating Loss Carryforwards [Line Items]
Prepaid tax assets	$ 4,015,000	$ 4,251,000
Effective tax rate	29.00%	28.70%	27.90%
Additional undistributed earnings of non-U.S. subsidiaries	757,000,000
Cumulative pre-tax loss carryforwards	3,100,000
Remaining net operating loss carryforwards expiration period	5 years
Existing valuation allowance	800,000
Largest amount of tax benefit that in the Company's judgment is likely to be realized, in percentage	50.00%
Recognized interest expense, net of tax benefit	300,000
Accrued interest and penalties on unrecognized tax benefits	1,100,000	1,300,000
Statute of limitations period, average, years	5 years
Maximum possible reduction in amount of unrecognized tax benefits	800,000
Unrecognized tax benefits in dispute with various taxing authorities	200,000
State And Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Cumulative pre-tax loss carryforwards	$ 900,000