Revenue, Receivables and Contract Assets and Liabilities (Details 2) - USD ($) $ in Thousands	Jun. 01, 2019	Mar. 02, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	$ 214,048	$ 197,139
Less: allowance for doubtful accounts	(4,710)	(4,372)
Net receivables	209,338	192,767
Trade accounts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	160,135	145,693
Construction contracts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	19,626	19,050
Construction contracts - retainage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	$ 34,287	$ 32,396