Income Taxes (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014
Federal:
Current	$ 103,127	$ 95,468	$ 90,207
Deferred	7,019	5,841	(9,589)
Federal Income Tax Expense (Benefit), Continuing Operations	110,146	101,309	80,618
State:
Current	5,347	1,160	1,912
Deferred	151	(86)	(279)
State and Local Income Tax Expense (Benefit), Continuing Operations	5,498	1,074	1,633
Foreign:
Current	10,855	11,062	10,077
Deferred	(994)	(1,159)	(980)
Foreign Income Tax Expense (Benefit), Continuing Operations	9,861	9,903	9,097
Income tax expense (benefit), total	$ 125,505	$ 112,286	$ 91,348