SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

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