| Quarterly Financial Information (Unaudited) | 
 
		
			 
		 
		
			
		 
		
			19. Quarterly Financial Information (Unaudited)
		 
		
			 
		 
		
			 
		 
		
			 
		 
		
			 
		 
		
			 
		 
		
			
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						2015 
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						First 
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						Second 
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						Third 
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						Fourth 
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						Net sales 
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						$ 
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53,890
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						$ 
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107,143
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						$ 
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120,565
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						$ 
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118,810
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						Gross profit 
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						$ 
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16,437
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						$ 
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37,010
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						$ 
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40,865
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						$ 
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38,551
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						Income before taxes 
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						$ 
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603
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						$ 
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20,954
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						$ 
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23,672
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						$ 
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21,034
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						Net income  
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						$ 
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383
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						$ 
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13,104
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						$ 
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15,548
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						$ 
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15,141
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						Basic net earnings per common share attributable to common shareholders 
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						$ 
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0.02
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						$ 
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0.58
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						$ 
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0.69
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						$ 
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0.66
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						Earnings per common share assuming dilution attributable to common shareholders 
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						$ 
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0.01
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						$ 
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0.57
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						$ 
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0.68
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						$ 
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0.68
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						Dividends per share 
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						$ 
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0.22
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						$ 
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0.22
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						$ 
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0.22
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						$ 
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0.22
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						2014 
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						First 
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						Second 
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						Third 
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						Fourth 
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						Net sales 
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						$ 
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36,396
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						$ 
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88,225
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						$ 
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78,836
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						$ 
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100,054
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						Gross profit 
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						$ 
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14,125
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						$ 
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34,415
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						$ 
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29,090
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						$ 
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38,696
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						Income (loss) before taxes 
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						$ 
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2,343
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						$ 
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22,417
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						$ 
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16,555
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						$ 
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20,682
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						Net income (loss)  
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						$ 
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1,575
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						$ 
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14,593
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						$ 
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10,762
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						$ 
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13,031
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						Basic net earnings per common share attributable to common shareholders 
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						$ 
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0.07
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						$ 
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0.65
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						$ 
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0.48
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						$ 
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0.58
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						Earnings per common share assuming dilution attributable to common shareholders 
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						$ 
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0.07
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						$ 
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0.64
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						$ 
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0.47
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						$ 
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0.58
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						Dividends per share 
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						$ 
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0.22
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						$ 
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0.22
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						$ 
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0.22
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						$ 
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0.22
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			Due to changes in stock prices during the year and timing of issuance of shares, the sum of quarterly earnings per share may not equal the annual earnings per share.
		 
 
  
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