SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2015

Accounting Policies [Abstract]

Schedule of inventories, net of reserves

	2015		2014
Chassis	$	8,048	$	4,700
Raw materials		28,328		24,291
Work in process		10,850		10,477
Finished goods		19,006		16,992
	$	66,232	$	56,460

Schedule of property, plant and equipment

	2015			2014
Land and improvements	$	5,812		$	5,223
Buildings and improvements		42,230			34,478
Machinery and equipment		30,821			30,143
Furniture and fixtures		8,978			8,590
Software costs		10,066			8,921
		97,907			87,355
Less accumulated depreciation		(58,432	)		(55,305	)
	$	39,475		$	32,050

Schedule of accrued liabilities

	2015		2014
Accrued wages, commissions, bonuses and benefits	$	6,482	$	5,956
Accrued products warranty		3,140		2,622
Accrued income taxes		4,747		7,416
Other		6,720		5,105
	$	21,089	$	21,099

Schedule of product warranty liability

	2015			2014
Accrual at beginning of the year	$	2,622		$	3,084
Provision		3,076			1,958
Settlement and Other		(2,558	)		(2,420	)
Accrual at end of year	$	3,140		$	2,622