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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2018
Accounting Policies [Abstract] |
Schedule of inventories, net of reserves |
|  | 2018 |  |  | 2017 |
Chassis |  | $ | 8,921 |  |  | $ | 7,525 |
Raw materials |  |  | 40,021 |  |  |  | 30,109 |
Work in process |  |  | 14,995 |  |  |  | 13,521 |
Finished goods |  |  | 29,830 |  |  |  | 17,412 |
|  | $ | 93,767 |  |  | $ | 68,567 |
Schedule of property, plant and equipment |
|  | 2018 |  |  | 2017 |
Land and improvements |  | $ | 11,807 |  |  | $ | 11,333 |
Buildings and improvements |  |  | 68,717 |  |  |  | 66,826 |
Machinery and equipment |  |  | 43,961 |  |  |  | 44,161 |
Furniture and fixtures |  |  | 7,786 |  |  |  | 10,227 |
Software costs |  |  | 5,695 |  |  |  | 10,345 |
|  |  | 137,966 |  |  |  | 142,892 |
Less accumulated depreciation |  |  | (55,116 | ) |  |  | (65,264 | )
|  | $ | 82,850 |  |  | $ | 77,628 |
Schedule of accrued liabilities |
|  | 2018 |  |  | 2017 |
Accrued wages, commissions, bonuses and benefits |  | $ | 9,152 |  |  | $ | 8,632 |
Accrued products warranty |  |  | 3,752 |  |  |  | 3,147 |
Accrued taxes |  |  | 1,039 |  |  |  | 828 |
Other |  |  | 10,920 |  |  |  | 9,394 |
|  | $ | 24,863 |  |  | $ | 22,001 |
Schedule of product warranty liability |
|  | 2018 |  |  | 2017 |
Accrual at beginning of the year |  | $ | 3,147 |  |  | $ | 2,821 |
Provision |  |  | 3,793 |  |  |  | 2,618 |
Settlement and Other |  |  | (3,188 | ) |  |  | (2,292 | )
Accrual at end of year |  | $ | 3,752 |  |  | $ | 3,147 |
Schedule of adoption to reported results |
|  | Balance at December 31, 2017 |  |  | Cumulative Effect Adjustment |  |  | Balance at January 1, 2018 |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Accounts Receivable, net |  | $ | 132,699 |  |  | $ | (2,496 | ) |  | $ | 130,203 |
Inventories, net |  |  | 68,567 |  |  |  | 1,996 |  |  |  | 70,563 |
Liabilities and Shareholders' Equity |  |  |  |  |  |  |  |  |  |  |  |
Accrued Liabilities |  |  | 22,001 |  |  |  | (176 | ) |  |  | 21,825 |
Accumulated Surplus |  |  | 55,580 |  |  |  | (324 | ) |  |  | 55,256 |
|  | Year Ended December 31, 2018 |
|  | As Reported |  |  | Balances Without Adoption of ASU 2014-09 |  |  | Effect of Adoption Increase/(Decrease) |
Statement of Income |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  |
Net Sales |  | $ | 711,706 |  |  | $ | 711,672 |  |  | $ | 34 |
Costs and Expenses |  |  |  |  |  |  |  |  |  |  |  |
Costs of Operations |  |  | 628,370 |  |  |  | 628,343 |  |  |  | 27 |
Income Tax Provision |  |  | 7,917 |  |  |  | 7,916 |  |  |  | 1 |
Net Income |  |  | 33,746 |  |  |  | 33,740 |  |  |  | 6 |
|  | December 31, 2018 |
|  | As Reported |  |  | Balances Without Adoption of ASU 2014-09 |  |  | Effect of Adoption Increase/(Decrease) |
Balance Sheet |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Accounts Receivable, net |  | $ | 149,142 |  |  | $ | 149,108 |  |  | $ | 34 |
Inventories, net |  |  | 93,767 |  |  |  | 93,794 |  |  |  | (27 | )
Liabilities and Shareholders’ Equity |  |  |  |  |  |  |  |  |  |  |  |
Accrued Liabilities |  |  | 24,863 |  |  |  | 24,862 |  |  |  | 1 |
Accumulated Surplus |  |  | 81,354 |  |  |  | 81,348 |  |  |  | 6 |

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