Working Capital (Schedule of Receivables) (Details) - USD ($) $ in Thousands	Mar. 03, 2018	Mar. 04, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	$ 213,382	$ 187,235
Less allowance for doubtful accounts	(1,530)	(1,495)
Net receivables	211,852	185,740
Trade accounts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	157,562	122,149
Construction contracts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	26,545	31,923
Contract retainage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	26,388	29,191
Other receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total receivables	$ 2,887	$ 3,972