Revenue, Receivables and Contract Assets and Liabilities (Details 2) - USD ($) $ in Thousands	Feb. 29, 2020	Mar. 02, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	$ 199,275	$ 197,139
Less: allowance for doubtful accounts	(2,469)	(4,372)
Receivables, net	196,806	192,767
Trade accounts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	141,126	145,693
Construction contracts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	20,808	19,050
Contract retainage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	$ 37,341	$ 32,396