Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 10,984	$ 37,678
Accounts receivable - net	76,828	76,582
Inventories - net	101,052	97,543
Prepaid income tax	246	188
Other current assets	12,418	9,120
Total current assets	201,528	221,111
Property, plant, and equipment - net	93,892	96,096
Other assets:
Goodwill	20,129	19,785
Other intangibles - net	56,001	57,440
Investments	159	162
Other assets	1,711	1,962
Total assets	373,420	396,556
Current liabilities:
Accounts payable	63,595	52,404
Deferred revenue	10,221	10,136
Accrued payroll and employee benefits	6,282	11,888
Accrued warranty	8,706	8,682
Current maturities of long-term debt	652	656
Other accrued liabilities	10,197	9,764
Total current liabilities	99,653	93,530
Long-term debt	101,752	129,310
Deferred tax liabilities	8,554	9,744
Other long-term liabilities	17,661	17,493
Stockholders' equity:
Common stock, par value $0.01, authorized 20,000,000 shares; shares issued at March 31, 2018 and December 31, 2017, 11,115,779; shares outstanding at March 31, 2018 and December 31, 2017, 10,365,345 and 10,340,576, respectively	111	111
Paid-in capital	45,307	45,017
Retained earnings	135,453	137,780
Treasury stock - at cost, common stock, shares at March 31, 2018 and December 31, 2017, 750,434 and 775,203, respectively	(18,180)	(18,662)
Accumulated other comprehensive loss	(16,891)	(17,767)
Total stockholders' equity	145,800	146,479
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 373,420	$ 396,556