Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Total net sales	$ 154,276	$ 167,094	$ 505,678	$ 462,438
Total cost of sales	126,584	135,791	411,696	375,880
Gross profit	27,692	31,303	93,982	86,558
Selling and administrative expenses	22,264	21,662	67,036	65,488
Amortization expense	1,655	1,762	5,046	5,322
Interest expense - net	1,079	1,296	4,031	4,813
Other (income) expense - net	(421)	157	(823)	(320)
Total expenses	24,577	24,877	75,290	75,303
Income before income taxes	3,115	6,426	18,692	11,255
Income tax expense	51	18	2,374	1,271
Net income	$ 3,064	$ 6,408	$ 16,318	$ 9,984
Basic earnings per common share (usd per share)	$ 0.29	$ 0.62	$ 1.57	$ 0.96
Diluted earnings per common share (usd per share)	$ 0.29	$ 0.61	$ 1.53	$ 0.95
Product
Total net sales	$ 119,256	$ 120,272	$ 392,566	$ 339,176
Total cost of sales	97,663	99,045	322,432	279,478
Service
Total net sales	35,020	46,822	113,112	123,262
Total cost of sales	$ 28,921	$ 36,746	$ 89,264	$ 96,402