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Summary of Significant Accounting Policies (Details 1) $ in Thousands | 1 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jan. 10, 2019 USD ($) shares | Dec. 01, 2018 USD ($) business | Mar. 03, 2018 USD ($)
Disaggregation of Revenue [Line Items] |  |  |
Number of businesses which operate under long-term, fixed-price contracts | business |  | 3 |
Revenue from businesses which operate under long-term, fixed-price contracts (as a percent) |  | 33.00% |
Number of businesses which changed revenue recognition practices due to the adoption of the new guidance | business |  | 1 |
Number of businesses that recognize revenue following an over-time output method | business |  | 1 |
Revenue from businesses that recognize revenue following an over-time output method (as a percent) |  | 21.00% |
Increase to retained earnings |  | $ 400,289 | $ 373,259
Subsequent Event |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Number of shares repurchased during period (in shares) | shares | 504,004 |  |
Value of shares repurchased during period | $ 14,900 |  |
Recognized at the time products are shipped |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percentage of total revenue |  | 46.00% |
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09 |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Increase to retained earnings |  |  | $ 3,000
AOCI |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Reclassification of tax effects (see Note 1) |  | $ 737 |
Retained earnings |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Reclassification of tax effects (see Note 1) |  | (737) |
New Accounting Pronouncement, Early Adoption, Effect | AOCI | Accounting Standards Update 2018-02 |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Reclassification of tax effects (see Note 1) |  | (700) |
New Accounting Pronouncement, Early Adoption, Effect | Retained earnings | Accounting Standards Update 2018-02 |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Reclassification of tax effects (see Note 1) |  | $ 700 |

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