Stock Based Compensation - Activity In Stock Option Plans (Detail) (USD $)	6 Months Ended
	Jan. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Available for Grant, Beginning of year	315,944
Shares Available For Grant, Granted	0
Shares Available For Grant, Exercised	0
Shares Available For Grant, Cancelled	0
Shares Available for Grant, End of year	315,944
Options Outstanding, Beginning of year	60,333
Options Outstanding, Granted	0
Options Outstanding, Exercised	0
Options Outstanding, Cancelled	0
Options Outstanding, End of year	60,333
Weighted Average Exercise Price, Beginning of year	$ 11.78
Weighted Average Exercise Price, Granted	$ 0
Weighted Average Exercise Price, Exercised	$ 0
Weighted Average Exercise Price, Cancelled	$ 0
Weighted Average Exercise Price, End of year	$ 11.78