Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Income Tax Disclosure [Abstract]
Prepaid tax assets	$ 4,421	$ 4,392
Effective tax rate	27.90%	27.90%	29.00%
Additional undistributed earnings of non-U.S. subsidiaries	$ 938,000
Existing valuation allowance	2,737	$ 3,471
Recognized interest expense, net of tax benefit	400
Unrecognized tax benefits	$ 18,187	$ 15,005	$ 18,419	$ 16,514
Statute of limitations period, average, years	5 years
Maximum possible reduction in amount of unrecognized tax benefits	$ 1,100
Cash held by foreign subsidiaries that was repatriated	$ 125,000