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Summary of Significant Accounting Policies (Details 2) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Dec. 01, 2018 | Dec. 02, 2017 | Dec. 01, 2018 | Dec. 02, 2017 | Mar. 03, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Net sales | $ 357,718 | $ 356,506 | $ 1,056,382 | $ 972,721 |
Cost of sales | 273,628 | 264,947 | 807,096 | 724,868 |
Gross profit | 84,090 | 91,559 | 249,286 | 247,853 |
Selling, general and administrative expenses | 52,682 | 57,024 | 167,224 | 161,438 |
Operating income | 31,408 | 34,535 | 82,062 | 86,415 |
Income tax expense | 6,730 | 9,704 | 18,030 | 26,517 |
Net earnings | 21,891 | $ 23,646 | 57,778 | $ 57,159 |
Inventories | 79,847 |  | 79,847 |  | $ 80,908
Costs and earnings on contracts in excess of billings | 60,140 |  | 60,140 |  | 4,120
Billings on contracts in excess of costs and earnings | 26,961 |  | 26,961 |  | 12,461
Other current liabilities | 59,230 |  | 59,230 |  | 79,696
Retained earnings | 400,289 |  | 400,289 |  | $ 373,259
Without adoption of ASC 606 |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Net sales | 355,765 |  | 1,042,600 |  |
Cost of sales | 272,087 |  | 796,802 |  |
Gross profit | 83,678 |  | 245,798 |  |
Selling, general and administrative expenses | 52,692 |  | 166,560 |  |
Operating income | 30,986 |  | 79,238 |  |
Income tax expense | 6,627 |  | 17,355 |  |
Net earnings | 21,572 |  | 55,628 |  |
Inventories | 89,250 |  | 89,250 |  |
Costs and earnings on contracts in excess of billings | 30,756 |  | 30,756 |  |
Billings on contracts in excess of costs and earnings | 25,923 |  | 25,923 |  |
Other current liabilities | 57,802 |  | 57,802 |  |
Retained earnings | $ 398,139 |  | $ 398,139 |  |

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