Revenue, Receivables and Contract Assets and Liabilities (Details 2) - USD ($) $ in Thousands	Dec. 01, 2018	Mar. 03, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	$ 203,056	$ 213,382
Less: allowance for doubtful accounts	(1,558)	(1,530)
Net receivables	201,498	211,852
Trade accounts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	155,651	157,562
Construction contracts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	14,229	26,545
Construction contracts - retainage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	33,176	26,388
Other receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	$ 0	$ 2,887