Income Taxes (Narrative) (Details) (USD $)	12 Months Ended			1 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012	Aug. 31, 2014 Subsequent Event [Member]
Income Tax [Line Items]
Prepaid tax assets	$ 4,392,000	$ 4,015,000
Effective tax rate	27.90%	29.00%	28.70%
Additional undistributed earnings of non-U.S. subsidiaries	914,000,000
Cash held by foreign subsidiaries that was repatriated				52,400,000
Existing valuation allowance	3,471,000	3,228,000
Recognized interest expense, net of tax benefit	300,000
Accrued interest and penalties on unrecognized tax benefits	1,700,000	1,100,000
Statute of limitations period, average, years	5 years
Maximum possible reduction in amount of unrecognized tax benefits	1,000,000
Unrecognized tax benefits in dispute with various taxing authorities	$ 200,000