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Summary of Significant Accounting Policies (Details 2) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Sep. 01, 2018 | Sep. 02, 2017 | Sep. 01, 2018 | Sep. 02, 2017 | Mar. 03, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Net sales | $ 362,133 | $ 343,907 | $ 698,664 | $ 616,214 |
Cost of sales | 277,667 | 257,906 | 533,468 | 459,919 |
Gross profit | 84,466 | 86,001 | 165,196 | 156,295 |
Selling, general and administrative expenses | 55,806 | 58,227 | 114,542 | 104,415 |
Operating income | 28,660 | 27,774 | 50,654 | 51,880 |
Income tax expense | 6,420 | 8,909 | 11,300 | 16,813 |
Net earnings | 20,513 | $ 17,409 | 35,887 | $ 33,512 |
Inventories | 81,933 |  | 81,933 |  | $ 80,908
Costs and earnings on contracts in excess of billings | 44,585 |  | 44,585 |  | 4,120
Billings on contracts in excess of costs and earnings | 24,907 |  | 24,907 |  | 12,461
Other current liabilities | 69,707 |  | 69,707 |  | 79,696
Retained earnings | 402,619 |  | 402,619 |  | $ 373,259
Without adoption of ASC 606 |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Net sales | 359,584 |  | 686,835 |  |
Cost of sales | 276,058 |  | 524,715 |  |
Gross profit | 83,526 |  | 162,120 |  |
Selling, general and administrative expenses | 55,481 |  | 113,868 |  |
Operating income | 28,045 |  | 48,252 |  |
Income tax expense | 6,274 |  | 10,726 |  |
Net earnings | 20,044 |  | 34,059 |  |
Inventories | 90,006 |  | 90,006 |  |
Costs and earnings on contracts in excess of billings | 16,943 |  | 16,943 |  |
Billings on contracts in excess of costs and earnings | 23,657 |  | 23,657 |  |
Other current liabilities | 68,373 |  | 68,373 |  |
Retained earnings | $ 407,446 |  | $ 407,446 |  |

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