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Operating Segments - Operating Profit (Loss) Per Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Net sales to customers: |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 104,850 | $ 95,031 | $ 88,252 | $ 87,956 | $ 88,193 | $ 86,333 | $ 85,753 | $ 87,169 | $ 376,089 | $ 347,448 | $ 318,263
Gross profit: |  |  |  |  |  |  |  |  |  |  |
Gross profit | 25,608 | 19,599 | 19,441 | 18,951 | 19,525 | 18,625 | 18,825 | 19,041 | 83,599 | 76,016 | 65,283
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 11,362 | 11,308 | 11,253
Income (loss) before income taxes: |  |  |  |  |  |  |  |  |  |  |
Income (loss) before income taxes | $ 16,274 | $ 11,681 | $ 10,843 | $ 10,182 | $ 10,282 | $ 21,628 | $ 9,316 | $ 11,532 | 48,980 | 52,758 | 44,717
Distillery products |  |  |  |  |  |  |  |  |  |  |
Net sales to customers: |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 314,055 | 291,008 | 265,243
Ingredient solutions |  |  |  |  |  |  |  |  |  |  |
Net sales to customers: |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 62,034 | 56,440 | 53,020
Operating Segments | Distillery products |  |  |  |  |  |  |  |  |  |  |
Net sales to customers: |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 314,055 | 291,008 | 265,243
Gross profit: |  |  |  |  |  |  |  |  |  |  |
Gross profit |  |  |  |  |  |  |  |  | 71,793 | 66,817 | 56,836
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 8,739 | 8,490 | 8,371
Income (loss) before income taxes: |  |  |  |  |  |  |  |  |  |  |
Income (loss) before income taxes |  |  |  |  |  |  |  |  | 64,791 | 60,424 | 53,583
Operating Segments | Ingredient solutions |  |  |  |  |  |  |  |  |  |  |
Net sales to customers: |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 62,034 | 56,440 | 53,020
Gross profit: |  |  |  |  |  |  |  |  |  |  |
Gross profit |  |  |  |  |  |  |  |  | 11,806 | 9,199 | 8,447
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 1,567 | 1,660 | 1,655
Income (loss) before income taxes: |  |  |  |  |  |  |  |  |  |  |
Income (loss) before income taxes |  |  |  |  |  |  |  |  | 9,336 | 6,613 | 5,836
Corporate |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 1,056 | 1,158 | 1,227
Income (loss) before income taxes: |  |  |  |  |  |  |  |  |  |  |
Income (loss) before income taxes |  |  |  |  |  |  |  |  | $ (25,147) | $ (14,279) | $ (14,702)

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