Income Taxes (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2010
Federal:
Current	$ 102,152	$ 84,119	$ 83,791
Deferred	(14,557)	278	(3,714)
Federal Income Tax Expense (Benefit), Continuing Operations	87,595	84,397	80,077
State:
Current	3,332	7,186	6,664
Deferred	(461)	(128)	473
State and Local Income Tax Expense (Benefit), Continuing Operations	2,871	7,058	7,137
Foreign:
Current	8,460	5,818	1,916
Deferred	(2,989)	229	(1,262)
Foreign Income Tax Expense (Benefit), Continuing Operations	5,471	6,047	654
Income tax expense (benefit), total	$ 95,937	$ 97,502	$ 87,868

The component of income tax expense for the period representing amounts paid or payable (or refundable) as determined by applying the provisions of enacted federal tax law to the domestic taxable Income or Loss from continuing operations.

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