Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net sales	$ 266,814	$ 252,596	$ 210,317
Costs and expenses:
Cost of goods sold	170,462	165,614	138,884
Selling and administrative expenses	71,816	66,396	52,018
Interest expense	802	688	519
	243,080	232,698	191,421
Gain on sale of property, plant and equipment	1,048
Income before taxes on income	24,782	19,898	18,896
Income tax expense	9,760	5,260	5,830
Net income	$ 15,022	$ 14,638	$ 13,066
Weighted average number of shares outstanding during the period
(Basic) (in shares)	14,510,156	14,082,243	13,761,009
(Diluted) (in shares)	15,118,768	14,897,489	14,578,644
Basic
Net earnings (in dollars per share)	$ 1.04	$ 1.04	$ 0.95
Diluted
Net earnings (in dollars per share)	$ 0.99	$ 0.98	$ 0.90
Other comprehensive income (loss), net of tax:
Recognition of net losses included in net periodic pension costs	$ 652	$ 667	$ 499
Recognition of settlement loss included in net periodic pension costs	272	287	297
Current period loss	(1,948)	(764)	(1,410)
(Loss) gain on cash flow hedging activities	(111)	95	37
Foreign Currency Translation Adjustment:
Reclassification of gain on foreign currency transactions included in net income		(170)
Foreign currency translation adjustments	20	243
Other comprehensive (loss) income	(1,115)	358	(577)
Comprehensive income	$ 13,907	$ 14,996	$ 12,489
Cash dividends per common share (in dollars per share)	$ 0.365	$ 0.34	$ 0.315