Debt	9 Months Ended
Dec. 01, 2012
Debt Disclosure [Abstract]
Debt	Debt During the third quarter of fiscal 2013, the Company entered into an amendment to its existing credit agreement. The amount of the revolving credit facility was increased from $80.0 million to $100.0 million and the expiration date was extended to October 2017. The Company's minimum required adjusted debt-to-EBITDA ratio was raised from 2.75 to 3.00. The credit facility also includes a letter of credit facility in the amount of up to $60.0 million, the outstanding amounts of which decrease the available commitment. No other provisions of the original agreement were materially amended by the amended credit agreement. No borrowings were outstanding under the amended credit agreement as of December 1, 2012 or under the original agreement as of March 3, 2012. The credit facility requires the Company to maintain a minimum level of net worth as defined in the credit facility based on certain quarterly financial calculations. The minimum required net worth computed in accordance with the credit agreement at December 1, 2012 was $260.1 million, whereas the Company’s net worth as defined in the credit facility was $330.1 million. The credit facility also requires that the Company maintain an adjusted debt-to-EBITDA ratio of not more than 3.00. This ratio is computed quarterly, with EBITDA computed on a rolling four-quarter basis. For purposes of calculating the adjusted debt in the adjusted debt-to-EBITDA ratio, the Company reduces non-credit facility debt for up to $25 million to the extent of unrestricted cash balances, cash equivalents and short-term marketable securities available for sale in excess of $15 million. The Company’s ratio was 0.11 at December 1, 2012. If the Company is not in compliance with either of these covenants, the lenders may terminate the commitment and/or declare any loan then outstanding to be immediately due and payable. At December 1, 2012, the Company was in compliance with the financial covenants of the credit facility. During the first quarter of fiscal 2013, $10.0 million of industrial development bonds were issued and made available for current and future investment in the Company’s storefront and entrance business in Michigan. The interest rate on the bonds resets weekly and is equal to the market rate of interest earned for similar revenue bonds or other tax-free securities. The bonds will mature in April 2042. The proceeds are reported as restricted investments in the consolidated balance sheet until disbursed. $5.1 million of proceeds were disbursed during the first nine months of fiscal 2013. Debt at December 1, 2012 consists of $12.0 million of recovery zone facility bonds, $18.4 million of industrial development bonds, including the newly issued $10.0 million noted above, and other debt held by GlassecViracon. The industrial development and recovery zone facility bonds mature in fiscal years 2021 through 2043, and the other debt matures in fiscal years 2013 through 2021. The fair value of the industrial development and recovery zone facility bonds approximates carrying value at December 1, 2012 due to the variable interest rates on these instruments. The bonds are classified as level 2 within the fair value hierarchy. Interest payments were $0.6 million and $0.8 million for the nine-months ended December 1, 2012 and November 26, 2011, respectively, and primarily relate to fees associated with our revolving credit facility.

Debt

During the third quarter of fiscal 2013, the Company entered into an amendment to its existing credit agreement. The amount of the revolving credit facility was increased from $80.0 million to $100.0 million and the expiration date was extended to October 2017. The Company's minimum required adjusted debt-to-EBITDA ratio was raised from 2.75 to 3.00. The credit facility also includes a letter of credit facility in the amount of up to $60.0 million, the outstanding amounts of which decrease the available commitment. No other provisions of the original agreement were materially amended by the amended credit agreement. No borrowings were outstanding under the amended credit agreement as of December 1, 2012 or under the original agreement as of March 3, 2012.

The credit facility requires the Company to maintain a minimum level of net worth as defined in the credit facility based on certain quarterly financial calculations. The minimum required net worth computed in accordance with the credit agreement at December 1, 2012 was $260.1 million, whereas the Company’s net worth as defined in the credit facility was $330.1 million. The credit facility also requires that the Company maintain an adjusted debt-to-EBITDA ratio of not more than 3.00. This ratio is computed quarterly, with EBITDA computed on a rolling four-quarter basis. For purposes of calculating the adjusted debt in the adjusted debt-to-EBITDA ratio, the Company reduces non-credit facility debt for up to $25 million to the extent of unrestricted cash balances, cash equivalents and short-term marketable securities available for sale in excess of $15 million. The Company’s ratio was 0.11 at December 1, 2012. If the Company is not in compliance with either of these covenants, the lenders may terminate the commitment and/or declare any loan then outstanding to be immediately due and payable. At December 1, 2012, the Company was in compliance with the financial covenants of the credit facility.

During the first quarter of fiscal 2013, $10.0 million of industrial development bonds were issued and made available for current and future investment in the Company’s storefront and entrance business in Michigan. The interest rate on the bonds resets weekly and is equal to the market rate of interest earned for similar revenue bonds or other tax-free securities. The bonds will mature in April 2042. The proceeds are reported as restricted investments in the consolidated balance sheet until disbursed. $5.1 million of proceeds were disbursed during the first nine months of fiscal 2013.

Debt at December 1, 2012 consists of $12.0 million of recovery zone facility bonds, $18.4 million of industrial development bonds, including the newly issued $10.0 million noted above, and other debt held by GlassecViracon. The industrial development and recovery zone facility bonds mature in fiscal years 2021 through 2043, and the other debt matures in fiscal years 2013 through 2021. The fair value of the industrial development and recovery zone facility bonds approximates carrying value at December 1, 2012 due to the variable interest rates on these instruments. The bonds are classified as level 2 within the fair value hierarchy.

Interest payments were $0.6 million and $0.8 million for the nine-months ended December 1, 2012 and November 26, 2011, respectively, and primarily relate to fees associated with our revolving credit facility.