| Schedule of Segment Reporting Information, by Segment [Table Text Block] |
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| | $ | 306,813 | | | $ | 295,949 | | |
| | | 341,598 | | | | 341,886 | | Inventory profit elimination (2) | | | (33,319 | ) | | | (31,858 | ) | |
| | $ | 615,092 | | | $ | 605,977 | | |
| Schedule of Segment Reporting Information, by Segment [Table Text Block] |
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| | $ | 120,455 | | | $ | 124,600 | | |
| | | 146,040 | | | | 145,043 | | Elimination of inter-company sales | | | (76,104 | ) | | | (78,937 | ) | |
| | $ | 190,391 | | | $ | 190,706 | | | | | | | | | | | | |
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| | $ | 20,587 | | | $ | 21,542 | | |
| | | 1,640 | | | | 1,762 | | Adjustment of inter-company profit (1) | | | (1,327 | ) | | | (2,834 | ) | |
| | $ | 20,900 | | | $ | 20,470 | | | | | | | | | | | | Depreciation & Amortization: | | | | | | | | | |
| | $ | 1,911 | | | $ | 2,094 | | |
| | | 2,872 | | | | 2,625 | | |
| | $ | 4,783 | | | $ | 4,719 | | | | | | | | | | | | |
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| | $ | 1,516 | | | $ | 3,961 | | |
| | | 1,622 | | | | 1,449 | | |
| | | - | | | | 1,991 | | |
| | $ | 3,138 | | | $ | 7,401 | | |