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CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Income Statement    
Net sales $ 71,040 $ 63,665
Cost of goods sold 56,134 50,977
Gross profit 14,906 12,688
Selling, general and administrative expenses 8,008 7,043
Operating income 6,898 5,645
Interest income 51 92
Income before income taxes 6,949 5,737
Income tax provision 1,688 1,816
Net income $ 5,261 $ 3,921
Earnings per share    
Basic (in dollars per share) $ 0.15 $ 0.10
Diluted (in dollars per share) 0.15 0.10
Dividends paid per share (in dollars per share) $ 0.07 $ 0.06