Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

v3.8.0.1
Document and Entity Information - USD ($)
9 Months Ended
Sep. 30, 2017
Nov. 03, 2017
Jun. 30, 2017
Document and Entity Information [Abstract]      
Entity Registrant Name Synalloy Corporation    
Entity Central Index Key 0000095953    
Current Fiscal Year End Date --12-31    
Entity Filer Category Accelerated Filer    
Entity Public Float     $ 92,943,780
Entity Common Stock, Shares Outstanding   8,728,498  
Document Fiscal Year Focus 2017    
Document Fiscal Period Focus Q3    
Document Type 10-Q    
Amendment Flag false    
Document Period End Date Sep. 30, 2017