XML 29 R1.htm IDEA: XBRL DOCUMENT v2.4.0.6
Document and Entity Information
 9 Months Ended
Sep. 30, 2012
Oct. 25, 2012
Dec. 31, 2011
Document and Entity Information      
Entity Registrant Name COMFORT SYSTEMS USA INC    
Entity Central Index Key 0001035983    
Document Type 10-Q    
Document Period End Date Sep. 30, 2012    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Entity Current Reporting Status Yes    
Entity Filer Category Accelerated Filer    
Entity Common Stock, Shares Outstanding   37,279,210  
Treasury Stock, Shares 3,820,660 3,844,155 3,714,506
Document Fiscal Year Focus 2012    
Document Fiscal Period Focus Q3