Schedule of Segment Reporting Information, by Segment [Table Text Block] |
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| | $ | 116,210 | | | $ | 113,133 | | | $ | 240,810 | | | $ | 226,331 | |
| | | 153,207 | | | | 151,496 | | | | 298,250 | | | | 293,323 | | Elimination of inter-company sales
| | | (72,350 | ) | | | (71,525 | ) | | | (151,287 | ) | | | (144,891 | ) |
| | $ | 197,067 | | | $ | 193,104 | | | $ | 387,773 | | | $ | 374,763 | | | | | | | | | | | | | | | | | | |
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| | $ | 13,155 | | | $ | 14,366 | | | $ | 34,697 | | | $ | 30,498 | |
| | | 2,953 | | | | 4,206 | | | | 4,715 | | | | 4,002 | | Adjustment of inter-company profit (1)
| | | 1,552 | | | | 1,278 | | | | (1,282 | ) | | | 1,294 | |
| | $ | 17,660 | | | $ | 19,850 | | | $ | 38,130 | | | $ | 35,794 | | | | | | | | | | | | | | | | | | | Depreciation & Amortization:
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| | $ | 1,995 | | | $ | 1,915 | | | $ | 4,089 | | | $ | 3,806 | |
| | | 2,680 | | | | 2,495 | | | | 5,305 | | | | 4,893 | |
| | $ | 4,675 | | | $ | 4,410 | | | $ | 9,394 | | | $ | 8,699 | | | | | | | | | | | | | | | | | | |
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| | $ | 3,048 | | | $ | 3,018 | | | $ | 7,009 | | | $ | 4,492 | |
| | | 4,657 | | | | 2,235 | | | | 6,106 | | | | 4,066 | |
| | | - | | | | - | | | | 1,991 | | | | - | |
| | $ | 7,705 | | | $ | 5,253 | | | $ | 15,106 | | | $ | 8,558 | |
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Schedule of Segment Reporting Information, by Segment [Table Text Block] |
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| | $ | 330,770 | | | $ | 339,271 | |
| | | 350,864 | | | | 344,025 | | Inventory profit elimination (2)
| | | (29,567 | ) | | | (28,862 | ) |
| | $ | 652,067 | | | $ | 654,434 | |
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