Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 13,271	$ 37,678
Accounts receivable - net	96,310	76,582
Inventories - net	101,343	97,543
Prepaid income tax	347	188
Other current assets	12,090	9,120
Total current assets	223,361	221,111
Property, plant, and equipment - net	89,467	96,096
Other assets:
Goodwill	19,566	19,785
Other intangibles - net	53,675	57,440
Investments	159	162
Other assets	1,416	1,962
Total assets	387,644	396,556
Current liabilities:
Accounts payable	73,667	52,404
Deferred revenue	12,221	10,136
Accrued payroll and employee benefits	10,007	11,888
Accrued warranty	8,705	8,682
Current maturities of long-term debt	631	656
Other accrued liabilities	9,208	9,764
Total current liabilities	114,439	93,530
Long-term debt	98,406	129,310
Deferred tax liabilities	8,231	9,744
Other long-term liabilities	17,352	17,493
Stockholders' equity:
Common stock, par value $0.01, authorized 20,000,000 shares; shares issued at June 30, 2018 and December 31, 2017, 11,115,779; shares outstanding at June 30, 2018 and December 31, 2017, 10,365,345 and 10,340,576, respectively	111	111
Paid-in capital	46,129	45,017
Retained earnings	140,393	137,780
Treasury stock - at cost, common stock, shares at June 30, 2018 and December 31, 2017, 750,434 and 775,203, respectively	(18,180)	(18,662)
Accumulated other comprehensive loss	(19,237)	(17,767)
Total stockholders' equity	149,216	146,479
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 387,644	$ 396,556