Revenue, Receivables and Contract Assets and Liabilities (Details 2) - USD ($) $ in Thousands	Feb. 27, 2021	Feb. 29, 2020	Mar. 02, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	$ 177,864	$ 199,275
Less: allowance for credit losses	1,947	2,469	$ 4,372
Receivables, net	175,917	196,806
Trade accounts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	120,534	141,126
Construction contracts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	12,163	20,808
Contract retainage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	$ 45,167	$ 37,341