Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net sales	$ 376,701	$ 346,350	$ 266,814
Costs and expenses:
Cost of goods sold	247,772	224,653	170,462
Selling and administrative expenses	107,282	96,710	70,592
Other periodic pension costs	1,962	385	1,224
Interest expense	4,399	3,207	802
	361,415	324,955	243,080
Gain on sale of property, plant and equipment			1,048
Income before taxes on income	15,286	21,395	24,782
Income tax expense	3,220	4,420	9,760
Net income	$ 12,066	$ 16,975	$ 15,022
Net income per share:
Net income per share, basic (in dollars per share)	$ 0.81	$ 1.14	$ 1.04
Net income per share, diluted (in dollars per share)	$ 0.79	$ 1.10	$ 0.99
Weighted average number of shares outstanding during the period
Weighted average number of shares outstanding during the period, basic (in shares)	14,945,165	14,937,786	14,510,156
Weighted average number of shares outstanding during the period, diluted (in shares)	15,266,408	15,472,133	15,118,768
Other comprehensive income (loss), net of tax:
Recognition of net losses included in net periodic pension costs	$ 968	$ 862	$ 652
Recognition of settlement loss included in net periodic pension costs	835		272
Current period loss	1,354	1,253	1,948
Gain (loss) on cash flow hedging activities	22	(203)	111
Foreign currency translation adjustments	(74)	518	(20)
Other comprehensive income (loss)	501	(706)	(1,115)
Comprehensive income	$ 12,567	$ 16,269	$ 13,907
Cash dividends per common share (in dollars per share)	$ 400	$ 390	$ 365