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v3.10.0.1

Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Mar. 14, 2018 | May 08, 2017 | Aug. 30, 2017 | May 25, 2017 | Nov. 07, 2016 | Sep. 02, 2016 | Jan. 29, 2016 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2016
Net sales | $ 8,000 | $ 45,000 | $ 14,000 | $ 25,000 | $ 40,000 | $ 25,000 | $ 35,000 | $ 231,086 | $ 192,223 | $ 174,778 | $ 173,495 | $ 207,005 | $ 171,189 | $ 161,178 | $ 146,368 | $ 771,582 | $ 685,740 | $ 571,459
Net earnings |  |  |  |  |  |  |  | $ 28,452 | $ 19,019 | $ 9,994 | $ 34,671 | $ 19,174 | $ 12,645 | $ 11,157 | $ 10,727 | $ 92,136 | $ 53,703 | $ 45,882
Earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  |  |  |  |  |  | $ 1.10 | $ 0.73 | $ 0.39 | $ 1.34 | $ 0.74 | $ 0.49 | $ 0.43 | $ 0.42 | $ 3.56 | $ 2.08 | $ 1.78
Diluted |  |  |  |  |  |  |  | 1.09 | 0.73 | 0.38 | 1.33 | 0.74 | 0.49 | 0.43 | 0.41 | 3.54 | 2.07 | 1.77
Dividends declared per common share |  |  |  |  |  |  |  | 0.08 | 0.08 | 0.08 | 0.08 | 0.08 | 0.08 | 0.08 | 0.08 | $ 0.32 | $ 0.32 | $ 0.32
Common Stock per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
High |  |  |  |  |  |  |  | 70.20 | 60.25 | 66.80 | 65.95 | 63.80 | 61.40 | 58.95 | 58.75 |  |  |
Low |  |  |  |  |  |  |  | $ 57.00 | $ 54.35 | $ 57.15 | $ 51.55 | $ 50.30 | $ 55.15 | $ 51.80 | $ 42.95 |  |  |

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