| Selected Quarterly Financial Information (unaudited) |  
		
			13. Selected Quarterly Financial Information (unaudited)
		 
			The following tables present the Company’s unaudited quarterly results for fiscal 2018 and fiscal 2017.
		 
			
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						  | 
						  |  
				| 
						  | 
						  | 
						Fiscal 2018 |  
				| 
						(in thousands, except per share data) | 
						  | 
						First Quarter | 
						  | 
						Second Quarter | 
						  | 
						Third Quarter | 
						  | 
						Fourth Quarter |  
				| 
						Net sales | 
						  | 
						$ | 
						 402,948 | 
						  | 
						$ | 
						 434,279 | 
						  | 
						$ | 
						 435,882 | 
						  | 
						$ | 
						 436,739 |  
				| 
						Gross profit | 
						  | 
						  | 
						 165,386 | 
						  | 
						  | 
						 177,638 | 
						  | 
						  | 
						 178,226 | 
						  | 
						  | 
						 181,018 |  
				| 
						Income from continuing operations | 
						  | 
						  | 
						 36,506 | 
						  | 
						  | 
						 37,245 | 
						  | 
						  | 
						 34,237 | 
						  | 
						  | 
						 23,313 |  
				| 
						Basic earnings from continuing operations per share | 
						  | 
						  | 
						 0.38 | 
						  | 
						  | 
						 0.39 | 
						  | 
						  | 
						 0.35 | 
						  | 
						  | 
						 0.24 |  
				| 
						Diluted earnings from continuing operations per share | 
						  | 
						  | 
						 0.35 | 
						  | 
						  | 
						 0.35 | 
						  | 
						  | 
						 0.33 | 
						  | 
						  | 
						 0.22 |  
				| 
						Net income | 
						  | 
						  | 
						 31,871 | 
						  | 
						  | 
						 39,846 | 
						  | 
						  | 
						 26,568 | 
						  | 
						  | 
						 17,902 |  
				| 
						Basic earnings per share | 
						  | 
						  | 
						 0.33 | 
						  | 
						  | 
						 0.41 | 
						  | 
						  | 
						 0.27 | 
						  | 
						  | 
						 0.18 |  
				| 
						Diluted earnings per share | 
						  | 
						  | 
						 0.30 | 
						  | 
						  | 
						 0.38 | 
						  | 
						  | 
						 0.25 | 
						  | 
						  | 
						 0.17 | 
			 
		 
			
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						  | 
						  | 
						  | 
						  | 
						  | 
						  | 
						  | 
						  | 
						  | 
						  | 
						  | 
						  |  
				| 
						  | 
						  | 
						Fiscal 2017 |  
				| 
						(in thousands, except per share data) | 
						  | 
						First Quarter | 
						  | 
						Second Quarter | 
						  | 
						Third Quarter | 
						  | 
						Fourth Quarter |  
				| 
						Net sales | 
						  | 
						$ | 
						 307,296 | 
						  | 
						$ | 
						 344,047 | 
						  | 
						$ | 
						 343,923 | 
						  | 
						$ | 
						 389,501 |  
				| 
						Gross profit | 
						  | 
						  | 
						 125,471 | 
						  | 
						  | 
						 142,228 | 
						  | 
						  | 
						 142,491 | 
						  | 
						  | 
						 162,374 |  
				| 
						Income from continuing operations | 
						  | 
						  | 
						 22,672 | 
						  | 
						  | 
						 34,102 | 
						  | 
						  | 
						 28,596 | 
						  | 
						  | 
						 32,401 |  
				| 
						Basic earnings from continuing operations per share | 
						  | 
						  | 
						 0.27 | 
						  | 
						  | 
						 0.38 | 
						  | 
						  | 
						 0.30 | 
						  | 
						  | 
						 0.34 |  
				| 
						Diluted earnings from continuing operations per share | 
						  | 
						  | 
						 0.26 | 
						  | 
						  | 
						 0.34 | 
						  | 
						  | 
						 0.28 | 
						  | 
						  | 
						 0.31 |  
				| 
						Net income | 
						  | 
						  | 
						 11,128 | 
						  | 
						  | 
						 20,429 | 
						  | 
						  | 
						 23,255 | 
						  | 
						  | 
						 47,976 |  
				| 
						Basic earnings per share | 
						  | 
						  | 
						 0.13 | 
						  | 
						  | 
						 0.22 | 
						  | 
						  | 
						 0.25 | 
						  | 
						  | 
						 0.51 |  
				| 
						Diluted earnings per share | 
						  | 
						  | 
						 0.13 | 
						  | 
						  | 
						 0.20 | 
						  | 
						  | 
						 0.22 | 
						  | 
						  | 
						 0.46 | 
			 
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