Credit Facility	12 Months Ended
Jul. 31, 2011
Credit Facility [Abstract]
Credit Facility	(8) Credit Facility We have a committed $150,000,000 unsecured revolving credit facility ("Credit Facility") with a syndicate of bank lenders. The Credit Facility, as amended on September 21, 2010, expires on January 31, 2014 and provides for the extension of credit to us in the form of revolving loans, including letters of credit, at any time and from time to time during its term, in an aggregate principal amount at any time outstanding not to exceed $150,000,000 for both revolving loans and letters of credit, with sub-limits of $15,000,000 for commercial letters of credit and $35,000,000 for standby letters of credit. The Credit Facility may be used for acquisitions, stock repurchases, dividends, working capital and other general corporate purposes. At our election, borrowings under the Credit Facility will bear interest either at LIBOR plus an applicable margin or at the base rate plus an applicable margin. The interest rate margin over LIBOR ranges from 2.25 percent, up to a maximum amount of 2.75 percent. The base rate is a fluctuating rate equal to the highest of (i) the Prime Rate; (ii) the Federal Funds Effective Rate from time to time plus 0.5 percent; and (iii) two hundred (200) basis points in excess of the floating rate of interest determined, on a daily basis, in accordance with the terms of the agreement. The interest rate margin over the base rate ranges from 1.25 percent up to a maximum amount of 1.75 percent. In both cases, the applicable interest rate is based on the ratio of our consolidated total indebtedness to our consolidated earnings before interest, taxes, depreciation and amortization ("Consolidated EBITDA"). As defined in the Credit Facility, Consolidated EBITDA is adjusted for certain items. The Credit Facility contains covenants, including covenants limiting certain debt, certain liens on assets, certain sales of assets and receivables, certain payments (including dividends), certain repurchases of shares of our common stock, certain sale and leaseback transactions, certain guaranties and certain investments. The Credit Facility also contains financial condition covenants including that we (i) maintain a minimum Consolidated EBITDA (as defined in the Credit Facility), measured on a consolidated basis based on the four prior consecutive fiscal quarters then ending; (ii) not exceed a maximum ratio of consolidated total indebtedness to Consolidated EBITDA (each as defined in the Credit Facility), and; (iii) maintain a minimum fixed charge ratio (as defined in the Credit Facility); in each case measured on the last day of each fiscal quarter. The Credit Facility includes certain events of default, including: failure to make payments; failure to perform or observe terms, covenants and agreements; material inaccuracy of any representation or warranty; payment default relating to any indebtedness, as defined, with a principal amount in excess of $7,500,000 or acceleration of such indebtedness; occurrence of one or more final judgments or orders for the payment of money in excess of $7,500,000 that remain unsatisfied; incurrence of certain liabilities in connection with failure to maintain or comply with the Employee Retirement Income Security Act of 1974 ("ERISA"); any bankruptcy or insolvency; or a change of control, including if a person or group becomes the beneficial owner of 50 percent or more of our voting stock. If an event of default occurs, the interest rate on outstanding borrowings increases by an incremental default rate and the lenders may, among other things, terminate their commitments and declare all outstanding borrowings to be immediately due and payable together with accrued interest and fees. All amounts borrowed or outstanding under the Credit Facility are due and mature on January 31, 2014, unless the commitments are terminated earlier either at our request or if certain events of default occur. At July 31, 2011, we had $1,327,000 of standby letters of credit outstanding related to our guarantees of future performance on certain customer contracts and no outstanding commercial letters of credit. At July 31, 2011, had borrowings been outstanding under the Credit Facility, the applicable interest rate margin above LIBOR and base rate borrowings would have been 2.50 percent and 1.50 percent, respectively. We are also subject to an undrawn line fee based on the ratio of our consolidated total indebtedness to our Consolidated EBITDA, as defined and adjusted for certain items in the Credit Facility. Interest expense, including amortization of deferred financing costs, related to our credit facility recorded during fiscal 2011, 2010 and 2009 was $752,000, $625,000 and $69,000, respectively. In July 2011, we entered into an amendment to the Credit Facility which provides for, among other things, an increase in the basket amount for repurchases of equity securities and to eliminate, in its entirety, the requirement to maintain $100,000,000 of unrestricted cash and cash equivalents. The Credit Facility currently provides for, among other things, (i) an allowance of dividend payments of up to $30,000,000 during any four consecutive fiscal-quarter period (and the related exclusion of such amounts from the calculation of the fixed charge coverage ratio), (ii) an allowance for equity security repurchases (and the related exclusion of such amount from the calculation of the fixed charge coverage ratio), and (iii) a combined allowance for cash dividends and equity security repurchases (the portion of which amount is in excess of the above allowances) that is equal to 50 percent of our prior fiscal year net income. The Credit Facility requires us to achieve certain amounts of Consolidated EBITDA (as defined in the Credit Facility) during any four consecutive fiscal-quarter period beginning with the fiscal quarter ended October 31, 2010. At July 31, 2011, based on our Consolidated EBITDA (as defined in the Credit Facility) and our business outlook and related business plans, we believe we will be able to meet or obtain waivers for any applicable financial covenants that we are required to maintain.

We have a committed $150,000,000 unsecured revolving credit facility ("Credit Facility") with a syndicate of bank lenders. The Credit Facility, as amended on September 21, 2010, expires on January 31, 2014 and provides for the extension of credit to us in the form of revolving loans, including letters of credit, at any time and from time to time during its term, in an aggregate principal amount at any time outstanding not to exceed $150,000,000 for both revolving loans and letters of credit, with sub-limits of $15,000,000 for commercial letters of credit and $35,000,000 for standby letters of credit. The Credit Facility may be used for acquisitions, stock repurchases, dividends, working capital and other general corporate purposes.

At our election, borrowings under the Credit Facility will bear interest either at LIBOR plus an applicable margin or at the base rate plus an applicable margin. The interest rate margin over LIBOR ranges from 2.25 percent, up to a maximum amount of 2.75 percent. The base rate is a fluctuating rate equal to the highest of (i) the Prime Rate; (ii) the Federal Funds Effective Rate from time to time plus 0.5 percent; and (iii) two hundred (200) basis points in excess of the floating rate of interest determined, on a daily basis, in accordance with the terms of the agreement. The interest rate margin over the base rate ranges from 1.25 percent up to a maximum amount of 1.75 percent. In both cases, the applicable interest rate is based on the ratio of our consolidated total indebtedness to our consolidated earnings before interest, taxes, depreciation and amortization ("Consolidated EBITDA"). As defined in the Credit Facility, Consolidated EBITDA is adjusted for certain items.

The Credit Facility contains covenants, including covenants limiting certain debt, certain liens on assets, certain sales of assets and receivables, certain payments (including dividends), certain repurchases of shares of our common stock, certain sale and leaseback transactions, certain guaranties and certain investments. The Credit Facility also contains financial condition covenants including that we (i) maintain a minimum Consolidated EBITDA (as defined in the Credit Facility), measured on a consolidated basis based on the four prior consecutive fiscal quarters then ending; (ii) not exceed a maximum ratio of consolidated total indebtedness to Consolidated EBITDA (each as defined in the Credit Facility), and; (iii) maintain a minimum fixed charge ratio (as defined in the Credit Facility); in each case measured on the last day of each fiscal quarter.

The Credit Facility includes certain events of default, including: failure to make payments; failure to perform or observe terms, covenants and agreements; material inaccuracy of any representation or warranty; payment default relating to any indebtedness, as defined, with a principal amount in excess of $7,500,000 or acceleration of such indebtedness; occurrence of one or more final judgments or orders for the payment of money in excess of $7,500,000 that remain unsatisfied; incurrence of certain liabilities in connection with failure to maintain or comply with the Employee Retirement Income Security Act of 1974 ("ERISA"); any bankruptcy or insolvency; or a change of control, including if a person or group becomes the beneficial owner of 50 percent or more of our voting stock. If an event of default occurs, the interest rate on outstanding borrowings increases by an incremental default rate and the lenders may, among other things, terminate their commitments and declare all outstanding borrowings to be immediately due and payable together with accrued interest and fees. All amounts borrowed or outstanding under the Credit Facility are due and mature on January 31, 2014, unless the commitments are terminated earlier either at our request or if certain events of default occur.

At July 31, 2011, we had $1,327,000 of standby letters of credit outstanding related to our guarantees of future performance on certain customer contracts and no outstanding commercial letters of credit.

At July 31, 2011, had borrowings been outstanding under the Credit Facility, the applicable interest rate margin above LIBOR and base rate borrowings would have been 2.50 percent and 1.50 percent, respectively. We are also subject to an undrawn line fee based on the ratio of our consolidated total indebtedness to our Consolidated EBITDA, as defined and adjusted for certain items in the Credit Facility. Interest expense, including amortization of deferred financing costs, related to our credit facility recorded during fiscal 2011, 2010 and 2009 was $752,000, $625,000 and $69,000, respectively.

In July 2011, we entered into an amendment to the Credit Facility which provides for, among other things, an increase in the basket amount for repurchases of equity securities and to eliminate, in its entirety, the requirement to maintain $100,000,000 of unrestricted cash and cash equivalents.

The Credit Facility currently provides for, among other things, (i) an allowance of dividend payments of up to $30,000,000 during any four consecutive fiscal-quarter period (and the related exclusion of such amounts from the calculation of the fixed charge coverage ratio), (ii) an allowance for equity security repurchases (and the related exclusion of such amount from the calculation of the fixed charge coverage ratio), and (iii) a combined allowance for cash dividends and equity security repurchases (the portion of which amount is in excess of the above allowances) that is equal to 50 percent of our prior fiscal year net income. The Credit Facility requires us to achieve certain amounts of Consolidated EBITDA (as defined in the Credit Facility) during any four consecutive fiscal-quarter period beginning with the fiscal quarter ended October 31, 2010. At July 31, 2011, based on our Consolidated EBITDA (as defined in the Credit Facility) and our business outlook and related business plans, we believe we will be able to meet or obtain waivers for any applicable financial covenants that we are required to maintain.