Document and Entity Information Consolidated Balance Sheets Consolidated Balance Sheets (Parenthetical) Consolidated Statements of Earnings Consolidated Statements of Cash Flows Consolidated Statements of Stockholders' Equity Consolidated Statements of Stockholders' Equity (Parenthetical) Summary Of Significant Accounting Policies Inventories Accrued Liabilities Treasury Stock Net Earnings per Share Stock-Based Compensation 401(k) Plan Income Taxes Commitments and Contingencies Concentrations Environmental Business Segments Operating Leases Interim Financial Information Line Of Credit And Commercial Letters Of Credit Business Acquisition Other Subsequent Event Schedule II - Valuation And Qualifying Accounts