Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 346,350	$ 266,814	$ 252,596
Costs and expenses:
Cost of goods sold	224,653	170,462	165,614
Selling and administrative expenses	96,710	70,592	65,124
Other periodic pension costs	385	1,224	1,272
Interest expense	3,207	802	688
	324,955	243,080	232,698
Gain on sale of property, plant and equipment		1,048
Income before taxes on income	21,395	24,782	19,898
Income tax expense	4,420	9,760	5,260
Net income	$ 16,975	$ 15,022	$ 14,638
Weighted average number of shares outstanding during the period
(Basic) (in shares)	14,937,786	14,510,156	14,082,243
(Diluted) (in shares)	15,472,133	15,118,768	14,897,489
Basic
Net earnings (in dollars per share)	$ 1.14	$ 1.04	$ 1.04
Diluted
Net earnings (in dollars per share)	$ 1.10	$ 0.99	$ 0.98
Other comprehensive income (loss), net of tax:
Recognition of net losses included in net periodic pension costs	$ 862	$ 652	$ 667
Recognition of settlement loss included in net periodic pension costs		272	287
Current period loss	(1,253)	(1,948)	(764)
Gain (loss) on cash flow hedging activities	203	(111)	95
Reclassification of gain on foreign currency transactions included in net income			(170)
Foreign currency translation adjustments	(518)	20	243
Other comprehensive (loss) income	(706)	(1,115)	358
Comprehensive income	$ 16,269	$ 13,907	$ 14,996
Cash dividends per common share (in dollars per share)	$ 0.39	$ 0.365	$ 0.34